CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (Network Gateway ECU)

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Note
U1002 Lost Communication with Gateway Module (Network Gateway ECU) The network gateway ECU cannot receive signals from all ECUs that have been memorized as those connected to sub bus 2.

  • Open or short in sub bus 2 main line or connector

  • Open or short in sub bus 2 branch line or connector

  • Network gateway ECU

  • Absorber control ECU

    (w/ AVS System)

  • Driving support ECU assembly

    (w/ Pre-crash Safety System)

  • Clearance warning ECU assembly

    (w/ LEXUS parking assist-sensor system)

  • Option connector (Bus buffer ECU)

    (w/ Option connector)

  • Lane departure warning camera

    (w/ Lane departure alert system)

  • Blind spot monitor sensor LH

    (w/ Blind spot monitor system)

  • Open or short in No. 3 CAN junction connector

  • Open or short in No. 4 CAN junction connector

  • Open or short in No. 5 CAN junction connector

  • Open or short in No. 6 CAN junction connector

  • Open or short in No. 9 CAN junction connector

  • Open or short in No. 11 CAN junction connector

  • Open or short in No. 2 CAN junction terminal

Tech Tips

The network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Tech Tips

This diagnosis procedure is for when DTC U1002 is output by the network gateway ECU (GTS display: Gateway).

WIRING DIAGRAM

A001IOYE03
A001J7ME07
A001KOLE03
A001JNNE02

CAUTION / NOTICE / HINT

Note


  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Turn the engine switch on (IG) and wait at least 52 seconds, and then drive the vehicle at a speed of 40 km/h (25 mph) or more for 7 seconds or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.

    Click here

Tech Tips


  • Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    CHECK SUB BUS 2 Click here

    A

  2. CHECK SUB BUS 2


    1. Disconnect the cable from the negative (-) battery terminal.

    2. A001J4XC08
      *a

      Component with harness connector

      (Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or higher: Open circuit in a main bus line
      K47-13 (CA2H) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K47-12 (CA2L) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K47-13 (CA2H) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K47-12 (CA2L) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus line B
      Short circuit between bus lines C

      • Ground short

      • +B short

      		 D

    B

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU) Click here

    C

    CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU) Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 3 CAN JUNCTION CONNECTOR) Click here

    A

  3. CHECK FOR DTC OUTPUT


    1. Reconnect the cable to the negative (-) battery terminal.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Gateway > Clear DTCs

    6. Turn the engine switch off.

    7. Turn the engine switch on (IG).

    8. Check for DTCs.


      Body Electrical > Gateway > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 is not output A
      DTC U1002 is output B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE NETWORK GATEWAY ECU Click here

  4. CHECK SUB BUS 2


    1. Disconnect the cable from the negative (-) battery terminal.

    2. A001J4XC08
      *a

      Component with harness connector

      (Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or higher: Open circuit in a main bus line
      K47-13 (CA2H) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K47-12 (CA2L) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K47-13 (CA2H) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K47-12 (CA2L) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus line B
      Short circuit between bus lines C

      • Ground short

      • +B short

      		 D

    B

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU) Click here

    C

    CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU) Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 4 CAN JUNCTION CONNECTOR) Click here

    A

  5. CHECK FOR DTC OUTPUT


    1. Reconnect the cable to the negative (-) battery terminal.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Gateway > Clear DTCs

    6. Turn the engine switch off.

    7. Turn the engine switch on (IG).

    8. Check for DTCs.


      Body Electrical > Gateway > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 is not output A
      DTC U1002 is output B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE NETWORK GATEWAY ECU Click here

  6. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU)


    1. Disconnect the K47 network gateway ECU connector.

    2. A001ICSC26
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 2 CAN JUNCTION TERMINAL) Click here

  7. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU)


    1. Disconnect the K47 network gateway ECU connector.

    2. A001ICSC26
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 2 CAN JUNCTION TERMINAL) Click here

  8. CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU)


    1. Disconnect the K47 network gateway ECU connector.

    2. A001ICSC27
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 2 CAN JUNCTION TERMINAL) Click here

  9. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the K47 network gateway ECU connector.

    2. Disconnect the K107 No. 2 CAN junction terminal connector.

    3. B003TLKC07
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K107-3 (CANH) - K107-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 3 CAN JUNCTION CONNECTOR) Click here

  10. CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU)


    1. Disconnect the K47 network gateway ECU connector.

    2. A001ICSC32
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 2 CAN JUNCTION TERMINAL) Click here

  11. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the K47 network gateway ECU connector.

    2. Disconnect the K107 No. 2 CAN junction terminal connector.

    3. B003TLKC07
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal )

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K107-3 (CANH) - K107-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 4 CAN JUNCTION CONNECTOR) Click here

  12. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 3 CAN JUNCTION CONNECTOR)


    1. Disconnect the K111 No. 3 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

      A001IVGC52
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Connector)

      		 *b

      to Absorber Control ECU

      (w/ AVS System)
      *c to No. 5 CAN Junction Connector *d to Network Gateway ECU
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      K111-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Absorber control ECU*
      K111-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K111-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 5 CAN junction connector
      K111-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K111-4 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Network gateway ECU
      K111-15 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K111-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU*
      K111-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K111-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 5 CAN junction connector
      K111-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K111-4 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      K111-15 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *: w/ AVS system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (Network gateway ECU main line) B
      NG (ECU or sensor branch line) C
      NG (No. 5 CAN junction connector main line) D

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    B

    CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU) Click here

    C

    GO TO STEP 40 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 5 CAN JUNCTION CONNECTOR) Click here

  13. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the K47 network gateway ECU connector.

    2. Disconnect the K107 No. 2 CAN junction terminal connector.

    3. A001L1QC08
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K107-3 (CANH) - K107-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 3 CAN JUNCTION CONNECTOR) Click here

  14. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 3 CAN JUNCTION CONNECTOR)


    1. Reconnect the K107 No. 2 CAN junction terminal connector.

    2. Disconnect the K111 No. 3 CAN junction connector.

    3. A001JC8C03
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Connector)
      *b to No. 5 CAN Junction Connector
      *c to Network Gateway ECU

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K111-3 (CANH) - K111-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      K111-4 (CANH) - K111-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Network gateway ECU
      Result
      Result Proceed to
      OK A
      NG (Network gateway ECU main line) B
      NG (No. 5 CAN junction connector main line) C

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 3 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 5 CAN JUNCTION CONNECTOR) Click here

  15. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 4 CAN JUNCTION CONNECTOR)


    1. Disconnect the K112 No. 4 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

      A001IVGC45
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)

      		 *b

      to Absorber Control ECU

      (w/ AVS System)
      *c

      to Driving Support ECU Assembly

      (w/ Pre-crash Safety System)

      		 *d to No. 6 CAN Junction Connector
      *e to Network Gateway ECU - -
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      K112-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Absorber control ECU*1
      K112-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K112-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Driving support ECU assembly*2
      K112-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K112-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 6 CAN junction connector
      K112-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K112-4 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Network gateway ECU
      K112-15 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K112-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU*1
      K112-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Driving support ECU assembly*2
      K112-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      K112-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-4 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      K112-15 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ AVS system

      • *2: w/ Pre-crash safety system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (Network gateway ECU main line) B
      NG (ECU or sensor branch line) C
      NG (No. 6 CAN junction connector main line) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU) Click here

    C

    GO TO STEP 41 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 6 CAN JUNCTION CONNECTOR) Click here

  16. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the K47 network gateway ECU connector.

    2. Disconnect the K107 No. 2 CAN junction terminal connector.

    3. A001L1QC08
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K107-3 (CANH) - K107-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 4 CAN JUNCTION CONNECTOR) Click here

  17. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 4 CAN JUNCTION CONNECTOR)


    1. Reconnect the K107 No. 2 CAN junction terminal connector.

    2. Disconnect the K112 No. 4 CAN junction connector.

    3. A001JC8C15
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b to No. 6 CAN Junction Connector
      *c to Network Gateway ECU

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K112-3 (CANH) - K112-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      K112-4 (CANH) - K112-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Network gateway ECU
      Result
      Result Proceed to
      OK A
      NG (Network gateway ECU main line) B
      NG (No. 6 CAN junction connector main line) C

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 4 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 6 CAN JUNCTION CONNECTOR) Click here

  18. CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU)


    1. Reconnect the K111 No. 3 CAN junction connector.

    2. Disconnect the K47 network gateway ECU connector.

    3. A001ICSC28
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      K47-13 (CA2H) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K47-12 (CA2L) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K47-13 (CA2H) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K47-12 (CA2L) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 3 CAN JUNCTION CONNECTOR)

  19. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 3 CAN JUNCTION CONNECTOR)


    1. Reconnect the K107 No. 2 CAN junction terminal connector.

    2. Disconnect the K111 No. 3 CAN junction connector.

    3. A001JC8C28
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Connector)
      *b

      to Absorber Control ECU

      (w/ AVS System)
      *c to No. 5 CAN Junction Connector
      *d to Network Gateway ECU

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K111-1 (CANH) - K111-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU
      K111-3 (CANH) - K111-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      K111-4 (CANH) - K111-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Network gateway ECU

      • *: w/ AVS system

      Result
      Result Proceed to
      OK A
      NG (Network gateway ECU main line) B
      NG (ECU or sensor branch line) C
      NG (No. 5 CAN junction connector main line) D

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 3 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 43 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 5 CAN JUNCTION CONNECTOR) Click here

  20. CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU)


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the K47 network gateway ECU connector.

    3. A001ICSC33
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      K47-13 (CA2H) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K47-12 (CA2L) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K47-13 (CA2H) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K47-12 (CA2L) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 4 CAN JUNCTION CONNECTOR)

  21. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 4 CAN JUNCTION CONNECTOR)


    1. Reconnect the K107 No. 2 CAN junction terminal connector.

    2. Disconnect the K112 No. 4 CAN junction connector.

    3. A001JC8C19
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b

      to Absorber Control ECU

      (w/ AVS System)
      *c

      to Driving Support ECU Assembly

      (w/ Pre-crash Safety System)
      *d to No. 6 CAN Junction Connector
      *e to Network Gateway ECU

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K112-1 (CANH) - K112-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU*1
      K112-2 (CANH) - K112-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Driving support ECU assembly*2
      K112-3 (CANH) - K112-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      K112-4 (CANH) - K112-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Network gateway ECU

      • *1: w/ AVS system

      • *2: w/ Pre-crash safety system

      Result
      Result Proceed to
      OK A
      NG (Network gateway ECU main line) B
      NG (ECU or sensor branch line) C
      NG (No. 6 CAN junction connector main line) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 4 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 45 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 6 CAN JUNCTION CONNECTOR) Click here

  22. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the K111 No. 3 CAN junction connector.

    2. Disconnect the K113 No. 5 CAN junction connector.

    3. A001JC8C04
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b to No. 3 CAN Junction Connector
      *c to No. 11 CAN Junction Connector

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K113-1 (CANH) - K113-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 3 CAN junction connector
      K113-2 (CANH) - K113-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 3 CAN junction connector main line) B
      NG (No. 11 CAN junction connector main line) C

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 11 CAN JUNCTION CONNECTOR) Click here

  23. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the K114 No. 6 CAN junction connector.

    3. A001JC8C16
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to No. 4 CAN Junction Connector
      *c to No. 11 CAN Junction Connector

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K114-1 (CANH) - K114-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 4 CAN junction connector
      K114-2 (CANH) - K114-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 4 CAN junction connector main line) B
      NG (No. 11 CAN junction connector main line) C

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 11 CAN JUNCTION CONNECTOR) Click here

  24. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the K111 No. 3 CAN junction connector.

    2. Disconnect the K113 No. 5 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      A001IVGC39
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)

      		 *b to No. 3 CAN Junction Connector
      *c to No. 11 CAN Junction Connector *d

      to Option Connector (Bus Buffer ECU)

      (w/ Option Connector)
      *e

      to Driving Support ECU Assembly

      (w/ Pre-crash Safety System)

      		 *f

      to Clearance Warning ECU Assembly

      (w/ LEXUS Parking Assist-sensor System)
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      K113-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 3 CAN junction connector
      K113-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K113-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 11 CAN junction connector
      K113-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K113-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Option connector (Bus buffer ECU)*1
      K113-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K113-5 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Driving support ECU assembly*2
      K113-16 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K113-6 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Clearance warning ECU assembly*3
      K113-17 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K113-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 3 CAN junction connector
      K113-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K113-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      K113-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K113-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Option connector (Bus buffer ECU)*1
      K113-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K113-5 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Driving support ECU assembly*2
      K113-16 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K113-6 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Clearance warning ECU assembly*3
      K113-17 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Option connector

      • *2: w/ Pre-crash safety system

      • *3: w/ LEXUS parking assist-sensor system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 3 CAN junction connector main line) C
      NG (No. 11 CAN junction connector main line) D

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    GO TO STEP 40 Click here

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 11 CAN JUNCTION CONNECTOR) Click here

  25. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the K114 No. 6 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      A001IVGC46
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)

      		 *b to No. 4 CAN Junction Connector
      *c to No. 11 CAN Junction Connector *d

      to Clearance Warning ECU Assembly

      (w/ LEXUS Parking Assist-sensor System)
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      K114-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 4 CAN junction connector
      K114-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K114-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 11 CAN junction connector
      K114-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K114-6 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Clearance warning ECU assembly*
      K114-17 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K114-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 4 CAN junction connector
      K114-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K114-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      K114-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K114-6 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Clearance warning ECU assembly*
      K114-17 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ LEXUS parking assist-sensor system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 4 CAN junction connector main line) C
      NG (No. 11 CAN junction connector main line) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    GO TO STEP 41 Click here

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 11 CAN JUNCTION CONNECTOR) Click here

  26. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the K111 No. 3 CAN junction connector.

    2. Disconnect the K113 No. 5 CAN junction connector.

    3. A001JC8C06
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b to No. 3 CAN Junction Connector
      *c to No. 11 CAN Junction Connector
      *d

      to Option Connector (Bus Buffer ECU)

      (w/ Option Connector)
      *e

      to Driving Support ECU Assembly

      (w/ Pre-crash Safety System)
      *f

      to Clearance Warning ECU Assembly

      (w/ LEXUS Parking Assist-sensor System)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K113-1 (CANH) - K113-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 3 CAN junction connector
      K113-2 (CANH) - K113-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      K113-3 (CANH) - K113-14 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher Option connector (Bus buffer ECU)*1
      K113-5 (CANH) - K113-16 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Driving support ECU assembly*2
      K113-6 (CANH) - K113-17 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Clearance warning ECU assembly*3

      • *1: w/ Option connector

      • *2: w/ Pre-crash safety system

      • *3: w/ LEXUS parking assist-sensor system

      Result
      Result Proceed to
      OK A
      NG (No. 3 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 11 CAN junction connector main line) D

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 43 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 11 CAN JUNCTION CONNECTOR) Click here

  27. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 11 CAN JUNCTION CONNECTOR)


    1. Reconnect the K113 No. 5 CAN junction connector.

    2. Disconnect the S17 No. 11 CAN junction connector.

    3. A001JBPC13
      *a

      Front view of wire harness connector

      (to No. 11 CAN Junction Connector)
      *b to No. 5 CAN Junction Connector
      *c to No. 9 CAN Junction Connector

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      S17-1 (CANH) - S17-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      S17-2 (CANH) - S17-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 5 CAN junction connector main line) B
      NG (No. 9 CAN junction connector main line) C

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 9 CAN JUNCTION CONNECTOR) Click here

  28. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the K114 No. 6 CAN junction connector.

    3. A001JC8C20
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to No. 4 CAN Junction Connector
      *c to No. 11 CAN Junction Connector
      *d

      to Clearance Warning ECU Assembly

      (w/ LEXUS Parking Assist-sensor System)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K114-1 (CANH) - K114-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 4 CAN junction connector
      K114-2 (CANH) - K114-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      K114-6 (CANH) - K114-17 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Clearance warning ECU assembly*

      *: w/ LEXUS parking assist-sensor system

      Result
      Result Proceed to
      OK A
      NG (No. 4 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 11 CAN junction connector main line) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 45 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 11 CAN JUNCTION CONNECTOR) Click here

  29. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 11 CAN JUNCTION CONNECTOR)


    1. Reconnect the K114 No. 6 CAN junction connector.

    2. Disconnect the S17 No. 11 CAN junction connector.

    3. A001JBPC19
      *a

      Front view of wire harness connector

      (to No. 11 CAN Junction Connector)
      *b to No. 6 CAN Junction Connector
      *c to No. 9 CAN Junction Connector

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      S17-1 (CANH) - S17-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      S17-2 (CANH) - S17-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 6 CAN junction connector main line) B
      NG (No. 9 CAN junction connector main line) C

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 9 CAN JUNCTION CONNECTOR) Click here

  30. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 11 CAN JUNCTION CONNECTOR)


    1. Reconnect the K113 No. 5 CAN junction connector.

    2. Disconnect the S17 No. 11 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      A001J0XC02
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 11 CAN Junction Connector)

      		 *b to No. 5 CAN Junction Connector
      *c to No. 9 CAN Junction Connector *d

      to Lane Departure Warning Camera

      (w/ Lane Departure Alert System)
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      S17-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 5 CAN junction connector
      S17-7 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      S17-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 9 CAN junction connector
      S17-8 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      S17-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Lane departure warning camera*
      S17-9 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      S17-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 5 CAN junction connector
      S17-7 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      S17-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 9 CAN junction connector
      S17-8 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      S17-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Lane departure warning camera*
      S17-9 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ Lane departure alert system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 5 CAN junction connector main line) C
      NG (No. 9 CAN junction connector main line) D

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    GO TO STEP 40 Click here

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 9 CAN JUNCTION CONNECTOR) Click here

  31. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 9 CAN JUNCTION CONNECTOR)


    1. Reconnect the S17 No. 11 CAN junction connector.

    2. Disconnect the Q55 No. 9 CAN junction connector.

    3. A001JBPC14
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q55-1 (CANH) - Q55-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Q55-2 (CANH) - Q55-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector main line) B
      NG (No. 2 CAN junction terminal main line) C

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

  32. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 11 CAN JUNCTION CONNECTOR)


    1. Reconnect the K114 No. 6 CAN junction connector.

    2. Disconnect the S17 No. 11 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      A001J0XC05
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 11 CAN Junction Connector)

      		 *b to No. 6 CAN Junction Connector
      *c to No. 9 CAN Junction Connector *d

      to Lane Departure Warning Camera

      (w/ Lane Departure Alert System)
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      S17-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 6 CAN junction connector
      S17-7 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      S17-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 9 CAN junction connector
      S17-8 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      S17-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Lane departure warning camera*
      S17-9 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      S17-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      S17-7 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      S17-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 9 CAN junction connector
      S17-8 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      S17-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Lane departure warning camera*
      S17-9 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ Lane departure alert system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 6 CAN junction connector main line) C
      NG (No. 9 CAN junction connector main line) D

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    GO TO STEP 41 Click here

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 9 CAN JUNCTION CONNECTOR) Click here

  33. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 9 CAN JUNCTION CONNECTOR)


    1. Reconnect the S17 No. 11 CAN junction connector.

    2. Disconnect the Q55 No. 9 CAN junction connector.

    3. A001JBPC22
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q55-1 (CANH) - Q55-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Q55-2 (CANH) - Q55-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector main line) B
      NG (No. 2 CAN junction terminal main line) C

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

  34. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 11 CAN JUNCTION CONNECTOR)


    1. Reconnect the K113 No. 5 CAN junction connector.

    2. Disconnect the S17 No. 11 CAN junction connector.

    3. A001JBPC15
      *a

      Front view of wire harness connector

      (to No. 11 CAN Junction Connector)
      *b to No. 5 CAN Junction Connector
      *c to No. 9 CAN Junction Connector
      *d

      to Lane Departure Warning Camera

      (w/ Lane Departure Alert System)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      S17-1 (CANH) - S17-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      S17-2 (CANH) - S17-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      S17-3 (CANH) - S17-9 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Lane departure warning camera*

      *: w/ Lane departure alert system

      Result
      Result Proceed to
      OK A
      NG (No. 5 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 9 CAN junction connector main line) D

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 43 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 9 CAN JUNCTION CONNECTOR) Click here

  35. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 11 CAN JUNCTION CONNECTOR)


    1. Reconnect the K114 No. 6 CAN junction connector.

    2. Disconnect the S17 No. 11 CAN junction connector.

    3. A001JBPC20
      *a

      Front view of wire harness connector

      (to No. 11 CAN Junction Connector)
      *b to No. 6 CAN Junction Connector
      *c to No. 9 CAN Junction Connector
      *d

      to Lane Departure Warning Camera

      (w/ Lane Departure Alert System)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      S17-1 (CANH) - S17-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      S17-2 (CANH) - S17-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      S17-3 (CANH) - S17-9 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Lane departure warning camera*

      *: w/ Lane departure alert system

      Result
      Result Proceed to
      OK A
      NG (No. 6 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 9 CAN junction connector main line) D

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 45 Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 9 CAN JUNCTION CONNECTOR) Click here

  36. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 9 CAN JUNCTION CONNECTOR)


    1. Reconnect the S17 No. 11 CAN junction connector.

    2. Disconnect the Q55 No. 9 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      A001J0XC03
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)

      		 *b to No. 11 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal *d

      to Blind Spot Monitor Sensor LH

      (w/ Blind Spot Monitor System)
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      Q55-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 11 CAN junction connector
      Q55-7 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q55-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 2 CAN junction terminal
      Q55-8 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q55-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Blind spot monitor sensor LH*
      Q55-9 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q55-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      Q55-7 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q55-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 2 CAN junction terminal
      Q55-8 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q55-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Blind spot monitor sensor LH*
      Q55-9 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ Blind spot monitor system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 2 CAN junction terminal main line) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 2 CAN JUNCTION TERMINAL) Click here

  37. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 9 CAN JUNCTION CONNECTOR)


    1. Reconnect the S17 No. 11 CAN junction connector.

    2. Disconnect the Q55 No. 9 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      A001J0XC06
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)

      		 *b to No. 11 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal *d

      to Blind Spot Monitor Sensor LH

      (w/ Blind Spot Monitor System)
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      Q55-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 11 CAN junction connector
      Q55-7 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q55-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 2 CAN junction terminal
      Q55-8 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q55-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Blind spot monitor sensor LH*
      Q55-9 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q55-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      Q55-7 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q55-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 2 CAN junction terminal
      Q55-8 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q55-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Blind spot monitor sensor LH*
      Q55-9 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ Blind spot monitor system

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 2 CAN junction terminal main line) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 2 CAN JUNCTION TERMINAL) Click here

  38. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 9 CAN JUNCTION CONNECTOR)


    1. Reconnect the S17 No. 11 CAN junction connector.

    2. Disconnect the Q55 No. 9 CAN junction connector.

    3. A001JBPC16
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal
      *d

      to Blind Spot Monitor Sensor LH

      (w/ Blind Spot Monitor System)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q55-1 (CANH) - Q55-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Q55-2 (CANH) - Q55-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      Q55-3 (CANH) - Q55-9 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Blind spot monitor sensor LH*

      *: w/ Blind spot monitor system

      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 2 CAN junction terminal main line) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

    D

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

  39. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 9 CAN JUNCTION CONNECTOR)


    1. Reconnect the S17 No. 11 CAN junction connector.

    2. Disconnect the Q55 No. 9 CAN junction connector.

    3. A001JBPC21
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal
      *d

      to Blind Spot Monitor Sensor LH

      (w/ Blind Spot Monitor System)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q55-1 (CANH) - Q55-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Q55-2 (CANH) - Q55-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      Q55-3 (CANH) - Q55-9 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Blind spot monitor sensor LH*

      *: w/ Blind spot monitor system

      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (No. 2 CAN junction terminal main line) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

    D

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

  40. CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the bus line shorted to +B or shorted to GND is connected.

      Click here

    3. A001J4XC09
      *a

      Component with harness connector

      (Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      K47-13 (CA2H) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K47-12 (CA2L) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K47-13 (CA2H) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K47-12 (CA2L) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • If the resistance becomes normal when the connector is disconnected from the ECU, there may be a short in the ECU.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINES OR CONNECTOR

  41. CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the bus line shorted to +B or shorted to GND is connected.

      Click here

    3. A001J4XC10
      *a

      Component with harness connector

      (Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      K47-13 (CA2H) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K47-12 (CA2L) - K47-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K47-13 (CA2H) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K47-12 (CA2L) - K47-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • If the resistance becomes normal when the connector is disconnected from the ECU, there may be a short in the ECU.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINES OR CONNECTOR

  42. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the Q55 No. 9 CAN junction connector.

    2. Disconnect the K107 No. 2 CAN junction terminal connector.

    3. A001KNBC01
      *1 DLC3
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      K107-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K107-2 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K107-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K107-2 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

  43. CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the short circuited branch line is connected.

      Click here

    3. A001J4XC07
      *a

      Component with harness connector

      (Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor).

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINES OR CONNECTOR

  44. CHECK FOR SHORT IN SUB BUS 2 LINE (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the Q55 No. 9 CAN junction connector.

    2. Disconnect the K107 No. 2 CAN junction terminal connector.

    3. A001KNBC03
      *1 DLC3
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      K107-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K107-2 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K107-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K107-2 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

  45. CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the short circuited branch line is connected.

      Click here

    3. A001J4XC07
      *a

      Component with harness connector

      (Network Gateway ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K47-13 (CA2H) - K47-12 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor).

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR