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 (w/o VGRS System) or sub bus 18 (w/ VGRS System).

  • Open or short in sub bus 2 (w/o VGRS System) or sub bus 18 (w/ VGRS System) main lines or connector

  • Short in sub bus 2 (w/o VGRS System) or sub bus 18 (w/ VGRS System) branch lines 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. 5 CAN junction connector (for LHD)

  • Open or short in No. 6 CAN junction connector (for RHD)

  • Open or short in No. 7 CAN junction connector (for LHD)

  • Open or short in No. 8 CAN junction connector (for RHD)

  • 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 (w/o VGRS System) or sub bus 18 (w/ VGRS System).

Tech Tips

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

WIRING DIAGRAM

B0073S0E01
B00731LE02
B0074AAE01
B0075EVE01

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 or any 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

    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), wait at least 60 seconds, and then drive the vehicle at a speed of 60 km/h (37 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 Click here

    A

  2. CHECK SUB BUS


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

    2. B0073PZC24
      *a

      Component with harness connected

      (Network Gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O46-13 (CA2H) - O46-12 (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 main bus lines
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (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 lines B
      Short circuit between bus lines C

      • Short to ground

      • +B short

      		 D

    B

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

    C

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

    D

    CHECK FOR SHORT IN SUB BUS LINE (NO. 7 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 from the network gateway ECU (GTS display: Gateway) A
      DTC U1002 is output from the network gateway ECU (GTS display: Gateway) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE NETWORK GATEWAY ECU Click here

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


    1. B0075DEC85
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

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


    1. Reconnect the O46 network gateway ECU connector.

    2. B0075JKC34
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Disconnect the O102 No. 2 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

  6. CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the O102 No. 2 CAN junction terminal connector.

    2. B0076YHC28
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to No. 5 CAN Junction Connector
      *c to Network Gateway ECU

      Disconnect the O108 No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O108-9 (CANH) - O108-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      O108-10 (CANH) - O108-21 (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 lines) B
      NG (No. 5 CAN junction connector main lines) C

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 7 CAN JUNCTION CONNECTOR)

    C

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


    1. Reconnect the O108 No. 7 CAN junction connector.

    2. B0076YHC22
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b to No. 7 CAN Junction Connector
      *c to No. 11 CAN Junction Connector

      Disconnect the O106 No. 5 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O106-7 (CANH) - O106-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 7 CAN junction connector
      O106-8 (CANH) - O106-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 7 CAN junction connector main lines) B
      NG (No. 11 CAN junction connector main lines) C

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

    C

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


    1. Reconnect the O106 No. 5 CAN junction connector.

    2. B0077B9C03
      *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

      Disconnect the W13 No. 11 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      W13-2 (CANH) - W13-8 (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 lines) B
      NG (No. 9 CAN junction connector main lines) C

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

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

    C

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


    1. Reconnect the W13 No. 11 CAN junction connector.

    2. B0076YHC23
      *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

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      U53-2 (CANH) - U53-13 (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 lines) B
      NG (No. 2 CAN junction terminal main lines) C

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

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

    C

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

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


    1. B0075DEC86
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

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


    1. Reconnect the O46 network gateway ECU connector.

    2. B0075JKC35
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Disconnect the O102 No. 2 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

  12. CHECK FOR SHORT IN SUB BUS LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the O102 No. 2 CAN junction terminal connector.

    2. B0076YHC24
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b

      to Absorber Control ECU

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

      Disconnect the O108 No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O108-7 (CANH) - O108-18 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU*
      O108-9 (CANH) - O108-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      O108-10 (CANH) - O108-21 (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 lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 5 CAN junction connector main lines) D

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 7 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 16 Click here

    D

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


    1. Reconnect the O108 No. 7 CAN junction connector.

    2. B0076YHC25
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b to No. 7 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)

      Disconnect the O106 No. 5 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O106-7 (CANH) - O106-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 7 CAN junction connector
      O106-8 (CANH) - O106-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      O106-9 (CANH) - O106-20 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher Option connector (bus buffer ECU)*1
      O106-10 (CANH) - O106-21 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Driving support ECU assembly*2
      O106-11 (CANH) - O106-22 (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. 7 CAN junction connector main lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 11 CAN junction connector main lines) D

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 16 Click here

    D

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


    1. Reconnect the O106 No. 5 CAN junction connector.

    2. B0077B9C04
      *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)

      Disconnect the W13 No. 11 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      W13-2 (CANH) - W13-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      W13-3 (CANH) - W13-9 (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 lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 9 CAN junction connector main lines) D

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

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

    C

    GO TO STEP 16 Click here

    D

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


    1. Reconnect the W13 No. 11 CAN junction connector.

    2. B0076YHC26
      *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)

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      U53-2 (CANH) - U53-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      U53-3 (CANH) - U53-14 (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 lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 2 CAN junction terminal main lines) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

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

    D

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

    C

  16. CHECK FOR SHORT IN SUB BUS 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. B0073PZC25
      *a

      Component with harness connected

      (Network Gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-13 (CA2H) - O46-12 (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 BRANCH LINES OR CONNECTOR

  17. CHECK FOR SHORT IN SUB BUS LINE (NO. 7 CAN JUNCTION CONNECTOR)


    1. Disconnect the O108 No. 7 CAN junction connector.

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

      B0073LAC11
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 7 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 Result Connected to
      O108-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Absorber control ECU*
      O108-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-9 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 5 CAN junction connector
      O108-20 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-10 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Network gateway ECU
      O108-21 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU*
      O108-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 5 CAN junction connector
      O108-20 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      O108-21 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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. 7 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 22 Click here

    D

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

    B

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


    1. Reconnect the O108 No. 7 CAN junction connector.

    2. B0075DEC87
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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. 7 CAN JUNCTION CONNECTOR)

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


    1. Reconnect the O108 No. 7 CAN junction connector.

    2. Disconnect the O106 No. 5 CAN junction connector.

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

      B0073LAC12
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)

      		 *b to No. 7 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 Result Connected to
      O106-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 7 CAN junction connector
      O106-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O106-8 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 11 CAN junction connector
      O106-19 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O106-9 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Option connector (bus buffer ECU)*1
      O106-20 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O106-10 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Driving support ECU assembly*2
      O106-21 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O106-11 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Clearance warning ECU assembly*3
      O106-22 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O106-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 7 CAN junction connector
      O106-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O106-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      O106-19 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O106-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Option connector (bus buffer ECU)*1
      O106-20 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O106-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Driving support ECU assembly*2
      O106-21 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O106-11 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Clearance warning ECU assembly*3
      O106-22 (CANL) - O8-16 (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 inspection.

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

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 7 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 22 Click here

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

    D

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


    1. Reconnect the O106 No. 5 CAN junction connector.

    2. Disconnect the W13 No. 11 CAN junction connector.

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

      B00773FC02
      *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 Result Connected to
      W13-1 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 5 CAN junction connector
      W13-7 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      W13-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 9 CAN junction connector
      W13-8 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      W13-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Lane departure warning camera*
      W13-9 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      W13-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 5 CAN junction connector
      W13-7 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 9 CAN junction connector
      W13-8 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Lane departure warning camera*
      W13-9 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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 22 Click here

    C

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

    D

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


    1. Reconnect the W13 No. 11 CAN junction connector.

    2. Disconnect the U53 No. 9 CAN junction connector.

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

      B0073LAC13
      *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 Result Connected to
      U53-1 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 11 CAN junction connector
      U53-12 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 2 CAN junction terminal
      U53-13 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Blind spot monitor sensor LH*
      U53-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      U53-12 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 2 CAN junction terminal
      U53-13 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Blind spot monitor sensor LH*
      U53-14 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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)

    D

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

    C

  22. CHECK FOR SHORT IN SUB BUS 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. B0073PZC26
      *a

      Component with harness connected

      (Network Gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (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 inspection.

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

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

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINE OR CONNECTOR

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


    1. Reconnect the U53 No. 9 CAN junction connector.

    2. B00751QC13
      *1 DLC3
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Disconnect the O102 No. 2 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O102-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O102-2 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O102-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O102-2 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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)

  24. CHECK SUB BUS


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

    2. B0073PZC24
      *a

      Component with harness connected

      (Network Gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O46-13 (CA2H) - O46-12 (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 main bus lines
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (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 lines B
      Short circuit between bus lines C

      • Short to ground

      • +B short

      		 D

    B

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

    C

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

    D

    CHECK FOR SHORT IN SUB BUS LINE (NO. 8 CAN JUNCTION CONNECTOR) Click here

    A

  25. 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 from the network gateway ECU (GTS display: Gateway) A
      DTC U1002 is output from the network gateway ECU (GTS display: Gateway) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE NETWORK GATEWAY ECU Click here

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


    1. B0075DEC85
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

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


    1. Reconnect the O46 network gateway ECU connector.

    2. B0075JKC34
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Disconnect the O102 No. 2 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

  28. CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the O102 No. 2 CAN junction terminal connector.

    2. B0076YHC27
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b to No. 6 CAN Junction Connector
      *c to Network Gateway ECU

      Disconnect the O110 No. 8 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O110-9 (CANH) - O110-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      O110-10 (CANH) - O110-21 (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 lines) B
      NG (No. 6 CAN junction connector main lines) C

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 8 CAN JUNCTION CONNECTOR)

    C

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


    1. Reconnect the O110 No. 8 CAN junction connector.

    2. B0076YHC29
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to No. 8 CAN Junction Connector
      *c to No. 11 CAN Junction Connector

      Disconnect the O107 No. 6 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O107-7 (CANH) - O107-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 8 CAN junction connector
      O107-8 (CANH) - O107-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 8 CAN junction connector main lines) B
      NG (No. 11 CAN junction connector main lines) C

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 8 CAN JUNCTION CONNECTOR)

    C

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


    1. Reconnect the O107 No. 6 CAN junction connector.

    2. B0077B9C03
      *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

      Disconnect the W13 No. 11 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      W13-2 (CANH) - W13-8 (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 lines) B
      NG (No. 9 CAN junction connector main lines) C

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

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

    C

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


    1. Reconnect the W13 No. 11 CAN junction connector.

    2. B0076YHC23
      *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

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      U53-2 (CANH) - U53-13 (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 lines) B
      NG (No. 2 CAN junction terminal main lines) C

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

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

    C

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

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


    1. B0075DEC86
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

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


    1. Reconnect the O46 network gateway ECU connector.

    2. B0075JKC35
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Disconnect the O102 No. 2 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 2 CAN JUNCTION TERMINAL

    NG

  34. CHECK FOR SHORT IN SUB BUS LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the O102 No. 2 CAN junction terminal connector.

    2. B0076YHC32
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b

      to Absorber Control ECU

      (w/ AVS System)
      *c

      Driving Support ECU Assembly

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

      Disconnect the O110 No. 8 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O110-7 (CANH) - O110-18 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU*1
      O110-8 (CANH) - O110-19 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Driving support ECU assembly*2
      O110-9 (CANH) - O110-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      O110-10 (CANH) - O110-21 (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 lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 6 CAN junction connector main lines) D

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 8 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 38 Click here

    D

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


    1. Reconnect the O110 No. 8 CAN junction connector.

    2. B0076YHC31
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to No. 8 CAN Junction Connector
      *c to No. 11 CAN Junction Connector
      *d

      to Clearance Warning ECU Assembly

      (w/ LEXUS Parking Assist-sensor System)

      Disconnect the O107 No. 6 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O107-7 (CANH) - O107-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 8 CAN junction connector
      O107-8 (CANH) - O107-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      O107-11 (CANH) - O107-22 (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. 8 CAN junction connector main lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 11 CAN junction connector main lines) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 8 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 38 Click here

    D

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


    1. Reconnect the O107 No. 6 CAN junction connector.

    2. B0077B9C04
      *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)

      Disconnect the W13 No. 11 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      W13-2 (CANH) - W13-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      W13-3 (CANH) - W13-9 (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 lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 9 CAN junction connector main lines) D

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

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

    C

    GO TO STEP 38 Click here

    D

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


    1. Reconnect the W13 No. 11 CAN junction connector.

    2. B0076YHC26
      *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)

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector
      U53-2 (CANH) - U53-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      U53-3 (CANH) - U53-14 (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 lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 2 CAN junction terminal main lines) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

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

    D

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

    C

  38. CHECK FOR SHORT IN SUB BUS 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. B0073PZC25
      *a

      Component with harness connected

      (Network Gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-13 (CA2H) - O46-12 (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 BRANCH LINES OR CONNECTOR

  39. CHECK FOR SHORT IN SUB BUS LINE (NO. 8 CAN JUNCTION CONNECTOR)


    1. Disconnect the O110 No. 8 CAN junction connector.

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

      B0073LAC14
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)

      		 *b

      to Absorber Control ECU

      (w/ AVS System)
      *c

      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 Result Connected to
      O110-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Absorber control ECU*1
      O110-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-8 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Driving support ECU assembly*2
      O110-19 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-9 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 6 CAN junction connector
      O110-20 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-10 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Network gateway ECU
      O110-21 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU*1
      O110-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Driving support ECU assembly*2
      O110-19 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      O110-20 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      O110-21 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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. 8 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 44 Click here

    D

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

    B

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


    1. Reconnect the O110 No. 8 CAN junction connector.

    2. B0075DEC87
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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. 8 CAN JUNCTION CONNECTOR)

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


    1. Reconnect the O110 No. 8 CAN junction connector.

    2. Disconnect the O107 No. 6 CAN junction connector.

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

      B0073LAC15
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)

      		 *b to No. 8 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 Result Connected to
      O107-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 8 CAN junction connector
      O107-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O107-8 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 11 CAN junction connector
      O107-19 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O107-11 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Clearance warning ECU assembly*
      O107-22 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O107-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 8 CAN junction connector
      O107-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O107-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      O107-19 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O107-11 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Clearance warning ECU assembly*
      O107-22 (CANL) - O8-16 (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 inspection.

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

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 8 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 44 Click here

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 8 CAN JUNCTION CONNECTOR)

    D

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


    1. Reconnect the O107 No. 6 CAN junction connector.

    2. Disconnect the W13 No. 11 CAN junction connector.

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

      B00773FC02
      *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 Result Connected to
      W13-1 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 6 CAN junction connector
      W13-7 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      W13-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 9 CAN junction connector
      W13-8 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      W13-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Lane departure warning camera*
      W13-9 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      W13-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      W13-7 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 9 CAN junction connector
      W13-8 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Lane departure warning camera*
      W13-9 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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 44 Click here

    C

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

    D

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


    1. Reconnect the W13 No. 11 CAN junction connector.

    2. Disconnect the U53 No. 9 CAN junction connector.

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

      B0073LAC13
      *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 Result Connected to
      U53-1 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 11 CAN junction connector
      U53-12 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 2 CAN junction terminal
      U53-13 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Blind spot monitor sensor LH*
      U53-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 CAN junction connector
      U53-12 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 2 CAN junction terminal
      U53-13 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Blind spot monitor sensor LH*
      U53-14 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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)

    D

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

    C

  44. CHECK FOR SHORT IN SUB BUS 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. B0073PZC26
      *a

      Component with harness connected

      (Network Gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (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 inspection.

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

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

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINE OR CONNECTOR

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


    1. Reconnect the U53 No. 9 CAN junction connector.

    2. B00751QC13
      *1 DLC3
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

      Disconnect the O102 No. 2 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O102-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O102-2 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O102-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O102-2 (CANL) - O8-16 (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 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 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)