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 lines or connector

  • Short in sub bus 2 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)

  • Lane departure warning camera

    (w/ Lane Departure Alert System)

  • Blind spot monitor sensor LH

    (w/ Blind Spot Monitor System)

  • Hybrid vehicle control ECU assembly

  • 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

  • Open or short in No. 9 CAN junction connector

  • Open or short in No. 11 junction connector

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

WIRING DIAGRAM

B004F82E02
B004ELDE02
B004G0RE02
B004G02E02

CAUTION / NOTICE / HINT

Note


  • Before measuring the resistance of the CAN bus, turn the power 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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary 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 power switch on (IG), turn the blind spot monitor main switch on, turn the cruise control main switch on, wait at least 52 seconds and then drive the vehicle at a speed of 36 km/h (22 mph) or more for 11.84 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 power 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 (-) auxiliary battery terminal.

    2. B004GFSC36
      *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 (-) auxiliary 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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      NG (Open circuit in CAN main bus lines) B
      NG (Short circuit between bus lines) C

      • NG (Ground short)

      • NG (+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. 7 CAN JUNCTION CONNECTOR) Click here

    A

  3. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Gateway > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power 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 2 MAIN LINES (NETWORK GATEWAY ECU)


    1. Disconnect the O46 network gateway ECU connector.

    2. B004GTVC01
      *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
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) auxiliary 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 2 MAIN LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Reconnect the O46 network gateway ECU connector.

    2. Disconnect the O141 hybrid vehicle control ECU assembly connector.

    3. B004EP2C31
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O141-34 (CA2H) - O141-35 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  6. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the O141 hybrid vehicle control ECU assembly connector.

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

    3. B004GOXC89
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to No. 5 CAN Junction Connector
      *c to Hybrid Vehicle Control ECU Assembly

      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 (-) auxiliary battery terminal 108 to 132 Ω No. 5 CAN junction connector
      O108-10 (CANH) - O108-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      Result
      Result Proceed to
      OK A
      NG (Hybrid vehicle control ECU assembly 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 (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

    C

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


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

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

    3. B004GOXC90
      *a

      Front view of wire harness connector

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

      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 (-) auxiliary battery terminal 108 to 132 Ω No. 7 CAN junction connector
      O106-8 (CANH) - O106-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 7 CAN junction connector main lines) B
      NG (No. 11 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 2 MAIN LINES (NO. 11 JUNCTION CONNECTOR)


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

    2. Disconnect the W13 No. 11 junction connector.

    3. B004FARC58
      *a

      Front view of wire harness connector

      (to No. 11 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
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 5 CAN junction connector
      W13-2 (CANH) - W13-8 (CANL) Cable disconnected from negative (-) auxiliary 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 JUNCTION CONNECTOR

    B

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

    C

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


    1. Reconnect the W13 No. 11 junction connector.

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

    3. B004GOXC91
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 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
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      U53-2 (CANH) - U53-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Network gateway ECU
      Result
      Result Proceed to
      OK A
      NG (No. 11 junction connector main lines) B
      NG (Network gateway ECU 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 JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

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


    1. Disconnect the O46 network gateway ECU connector.

    2. B004GTVC01
      *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
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) auxiliary 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 2 LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Reconnect the O46 network gateway ECU connector.

    2. Disconnect the O141 hybrid vehicle control ECU assembly connector.

    3. B004EP2C31
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O141-34 (CA2H) - O141-35 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  12. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the O141 hybrid vehicle control ECU assembly connector.

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

    3. B004GOXC92
      *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 Hybrid Vehicle Control ECU Assembly

      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 (-) auxiliary battery terminal 200 Ω or higher Absorber control ECU*
      O108-9 (CANH) - O108-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 5 CAN junction connector
      O108-10 (CANH) - O108-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly

      • *: w/ AVS System

      Result
      Result Proceed to
      OK A
      NG (Hybrid vehicle control ECU assembly 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 (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 16 Click here

    D

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


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

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

    3. B004GOXC93
      *a

      Front view of wire harness connector

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

      to Driving Support ECU Assembly

      (w/ Pre-crash Safety System)
      *e

      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
      O106-7 (CANH) - O106-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 7 CAN junction connector
      O106-8 (CANH) - O106-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      O106-10 (CANH) - O106-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Driving support ECU assembly*1
      O106-11 (CANH) - O106-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Clearance warning ECU assembly*2

      • *1: w/ Pre-crash Safety System

      • *2: 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 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 2 LINES (NO. 11 JUNCTION CONNECTOR)


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

    2. Disconnect the W13 No. 11 junction connector.

    3. B004FARC59
      *a

      Front view of wire harness connector

      (to No. 11 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
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 5 CAN junction connector
      W13-2 (CANH) - W13-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 9 CAN junction connector
      W13-3 (CANH) - W13-9 (CANL) Cable disconnected from negative (-) auxiliary 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 JUNCTION CONNECTOR

    B

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

    C

    GO TO STEP 16 Click here

    D

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


    1. Reconnect the W13 No. 11 junction connector.

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

    3. B004GOXC94
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 Junction Connector
      *c to Network Gateway ECU
      *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
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      U53-2 (CANH) - U53-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Network gateway ECU
      U53-3 (CANH) - U53-14 (CANL) Cable disconnected from negative (-) auxiliary 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 junction connector main lines) B
      NG (ECU or sensor branch lines) C
      NG (Network gateway ECU 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 JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

    C

  16. 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. B004GFSC37
      *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 (-) auxiliary 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 2 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.

      B004F01C09
      *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 Hybrid Vehicle Control ECU Assembly
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      O108-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Absorber control ECU*
      O108-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-9 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 5 CAN junction connector
      O108-20 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-10 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Hybrid vehicle control ECU assembly
      O108-21 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Hybrid vehicle control ECU assembly
      O108-21 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result Proceed to
      OK A
      NG (Hybrid vehicle control ECU assembly main line) B
      NG (ECU or sensor branch line) C
      NG (No. 5 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 2 LINE (NO. 5 CAN JUNCTION CONNECTOR) Click here

    B

  18. CHECK FOR SHORT IN SUB BUS 2 LINE (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


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

    2. Disconnect the O141 and O142 hybrid vehicle control ECU assembly connectors.

    3. B004G18C57
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O141-34 (CA2H) - O141-6 (E1) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O141-35 (CA2L) - O141-6 (E1) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O141-34 (CA2H) - O142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O141-35 (CA2L) - O142-3 (BATT) Cable disconnected from negative (-) auxiliary 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 Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

  19. CHECK FOR SHORT IN SUB BUS 2 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.

      B004F01C10
      *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 Junction Connector *d

      to Driving Support ECU Assembly

      (w/ Pre-crash Safety System)
      *e

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

      • *1: w/ Pre-crash Safety System

      • *2: 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 Result 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. 7 CAN junction connector main line) C
      NG (No. 11 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 2 LINE (NO. 11 JUNCTION CONNECTOR)


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

    2. Disconnect the W13 No. 11 junction connector.

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

      B004GTBC15
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 11 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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 5 CAN junction connector
      W13-7 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      W13-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 9 CAN junction connector
      W13-8 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      W13-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Lane departure warning camera*
      W13-9 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      W13-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary 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 Result 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 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 JUNCTION CONNECTOR)

    D

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


    1. Reconnect the W13 No. 11 junction connector.

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

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

      B004F01C11
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)

      		 *b to No. 11 Junction Connector
      *c to Network Gateway ECU *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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 11 junction connector
      U53-12 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      U53-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Network gateway ECU
      U53-13 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      U53-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Blind spot monitor sensor LH*
      U53-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      U53-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 junction connector
      U53-12 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      U53-13 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary 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 Result 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 junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (Network gateway ECU 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 JUNCTION CONNECTOR)

    D

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

    C

  22. 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. B004GFSC36
      *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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary 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.

      • 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 2 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 2 LINE (NETWORK GATEWAY ECU)


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

    2. Disconnect the O46 network gateway ECU connector.

    3. B004GTVC02
      *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 Result
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary 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 Result 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 (NO. 9 CAN JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

  24. CHECK SUB BUS 2


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

    2. B004GFSC36
      *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 (-) auxiliary 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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      NG (Open circuit in CAN main bus lines) B
      NG (Short circuit between bus lines) C

      • NG (Ground short)

      • NG (+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. 7 CAN JUNCTION CONNECTOR) Click here

    A

  25. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Gateway > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power 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 2 MAIN LINES (NETWORK GATEWAY ECU)


    1. Disconnect the O46 network gateway ECU connector.

    2. B004GTVC01
      *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
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) auxiliary 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 2 MAIN LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Reconnect the O46 network gateway ECU connector.

    2. Disconnect the O141 hybrid vehicle control ECU assembly connector.

    3. B004EP2C31
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O141-34 (CA2H) - O141-35 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  28. CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the O141 hybrid vehicle control ECU assembly connector.

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

    3. B004GOXC89
      *a

      Front view of wire harness connector

      (to No. 7 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
      O108-9 (CANH) - O108-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 6 CAN junction connector
      O108-10 (CANH) - O108-21 (CANL) Cable disconnected from negative (-) auxiliary 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. 7 CAN JUNCTION CONNECTOR

    B

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

    C

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


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

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

    3. B004GOXC95
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to No. 7 CAN Junction Connector
      *c to No. 11 Junction Connector

      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 (-) auxiliary battery terminal 108 to 132 Ω No. 7 CAN junction connector
      O107-8 (CANH) - O107-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 7 CAN junction connector main lines) B
      NG (No. 11 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. 7 CAN JUNCTION CONNECTOR)

    C

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


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

    2. Disconnect the W13 No. 11 junction connector.

    3. B004FARC58
      *a

      Front view of wire harness connector

      (to No. 11 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
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 6 CAN junction connector
      W13-2 (CANH) - W13-8 (CANL) Cable disconnected from negative (-) auxiliary 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 JUNCTION CONNECTOR

    B

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

    C

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


    1. Reconnect the W13 No. 11 junction connector.

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

    3. B004GOXC91
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 Junction Connector
      *c to Hybrid Vehicle Control ECU Assembly

      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 (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      U53-2 (CANH) - U53-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      Result
      Result Proceed to
      OK A
      NG (No. 11 junction connector main lines) B
      NG (Hybrid vehicle control ECU assembly 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 JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

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


    1. Disconnect the O46 network gateway ECU connector.

    2. B004GTVC01
      *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
      O46-13 (CA2H) - O46-12 (CA2L) Cable disconnected from negative (-) auxiliary 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 2 LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Reconnect the O46 network gateway ECU connector.

    2. Disconnect the O141 hybrid vehicle control ECU assembly connector.

    3. B004EP2C31
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O141-34 (CA2H) - O141-35 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  34. CHECK FOR SHORT IN SUB BUS 2 LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the O141 hybrid vehicle control ECU assembly connector.

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

    3. B004GOXC96
      *a

      Front view of wire harness connector

      (to No. 7 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
      O108-7 (CANH) - O108-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Absorber control ECU*1
      O108-8 (CANH) - O108-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Driving support ECU assembly*2
      O108-9 (CANH) - O108-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 6 CAN junction connector
      O108-10 (CANH) - O108-21 (CANL) Cable disconnected from negative (-) auxiliary 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. 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 38 Click here

    D

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


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

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

    3. B004GOXC97
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to No. 7 CAN Junction Connector
      *c to No. 11 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
      O107-7 (CANH) - O107-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 7 CAN junction connector
      O107-8 (CANH) - O107-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      O107-11 (CANH) - O107-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Clearance warning ECU assembly*

      • *: 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 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. 7 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 38 Click here

    D

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


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

    2. Disconnect the W13 No. 11 junction connector.

    3. B004FARC59
      *a

      Front view of wire harness connector

      (to No. 11 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
      W13-1 (CANH) - W13-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 6 CAN junction connector
      W13-2 (CANH) - W13-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 9 CAN junction connector
      W13-3 (CANH) - W13-9 (CANL) Cable disconnected from negative (-) auxiliary 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 JUNCTION CONNECTOR

    B

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

    C

    GO TO STEP 38 Click here

    D

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


    1. Reconnect the W13 No. 11 junction connector.

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

    3. B004GOXC94
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 11 Junction Connector
      *c to Hybrid Vehicle Control ECU Assembly
      *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
      U53-1 (CANH) - U53-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 junction connector
      U53-2 (CANH) - U53-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      U53-3 (CANH) - U53-14 (CANL) Cable disconnected from negative (-) auxiliary 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 junction connector main lines) B
      NG (ECU or sensor branch lines) C
      NG (Hybrid vehicle control ECU assembly 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 JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

    C

  38. 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. B004GFSC37
      *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 (-) auxiliary 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 2 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.

      B004F01C12
      *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 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
      O108-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Absorber control ECU*1
      O108-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-8 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Driving support ECU assembly*2
      O108-19 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-9 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 6 CAN junction connector
      O108-20 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-10 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Network gateway ECU
      O108-21 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O108-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU*1
      O108-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Driving support ECU assembly*2
      O108-19 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      O108-20 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary 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 Result 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 junction connector main line) D

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 44 Click here

    D

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

    B

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


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

    2. Disconnect the O46 network gateway ECU connector.

    3. B004GTVC02
      *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 Result
      O46-13 (CA2H) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary 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 Result 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. 7 CAN JUNCTION CONNECTOR)

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


    1. Reconnect the O108 No. 7 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.

      B004F01C13
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)

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

    D

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


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

    2. Disconnect the W13 No. 11 junction connector.

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

      B004GTBC15
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 11 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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 6 CAN junction connector
      W13-7 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      W13-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 9 CAN junction connector
      W13-8 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      W13-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Lane departure warning camera*
      W13-9 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      W13-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      W13-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary 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 Result 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 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 JUNCTION CONNECTOR)

    D

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


    1. Reconnect the W13 No. 11 junction connector.

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

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

      B004F01C11
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)

      		 *b to No. 11 Junction Connector
      *c to Hybrid Vehicle Control ECU Assembly *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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 11 junction connector
      U53-12 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      U53-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Hybrid vehicle control ECU assembly
      U53-13 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      U53-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Blind spot monitor sensor LH*
      U53-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      U53-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 11 junction connector
      U53-12 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Hybrid vehicle control ECU assembly
      U53-13 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) auxiliary 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 (-) auxiliary 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 Result 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 junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (Hybrid vehicle control ECU assembly 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 JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 2 LINE (HYBRID VEHICLE CONTROL ECU ASSEMBLY) Click here

    C

  44. 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. B004GFSC36
      *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 (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O46-12 (CA2L) - O46-4 (GND) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O46-13 (CA2H) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O46-12 (CA2L) - O46-2 (BATT) Cable disconnected from negative (-) auxiliary 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.

      • 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 2 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 2 LINE (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


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

    2. Disconnect the O141 and O142 hybrid vehicle control ECU assembly connectors.

    3. B004G18C57
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O141-34 (CA2H) - O141-6 (E1) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      O141-35 (CA2L) - O141-6 (E1) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      O141-34 (CA2H) - O142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O141-35 (CA2L) - O142-3 (BATT) Cable disconnected from negative (-) auxiliary 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 Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY)