CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (Power Management1)

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
U1002 Power management control ECU cannot receive signals from all ECUs that have been memorized as those connected to the CAN No. 2 bus.

  • Open or short in CAN No. 2 bus main wire or connector

  • Open or short in CAN No. 2 bus branch wire or connector

  • Power management control ECU

  • AFS ECU

  • Front active stabilizer control ECU

  • Rear active stabilizer control ECU

  • Suspension control ECU

  • Driving support ECU

  • Seat belt control ECU

  • Parking assist ECU

  • Clearance warning ECU

  • CAN No. 3 junction connector

  • CAN No. 4 junction connector

  • CAN No. 5 junction connector

WIRING DIAGRAM

A01NGC9E02
A01NGDLE01
A01NEWNE01
A01NDUWE01

INSPECTION PROCEDURE

Note


  • Turn the power switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.

  • Turn the power switch off before inspecting CAN bus wires for a ground short.

  • After the power switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

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 CAN NO. 2 BUS WIRE


    1. Turn the power switch off.

    2. A01NERPE03
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Result
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 54 to 69 Ω

      Below 54 Ω:

      Short circuit between bus wires

      70 Ω or higher:

      Open circuit in a main bus wire
      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus wire B
      Short circuit between bus wires (LHD) C
      Short circuit between bus wires (RHD) D

    B

    CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (POWER MANAGEMENT CONTROL ECU MAIN WIRE) Click here

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU) Click here

    D

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU) Click here

    A

  2. CHECK CAN NO. 2 BUS WIRE


    1. Turn the power switch off.

    2. A01NERPE04
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Result
      F97-34 (CA2H) - F97-6 (E1) Power switch off 200 Ω or higher

      Below 200 Ω:

      CANH ground short
      F97-35 (CA2L) - F97-6 (E1) Power switch off 200 Ω or higher

      Below 200 Ω:

      CANL ground short

    3. Disconnected the cable from the negative (-) battery terminal.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      F97-34 (CA2H) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short
      F97-34 (CA2L) - F97-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B

      • Ground short

      • +B short

      (for LHD)

      		 C

      • Ground short

      • +B short

      (for RHD)

      		 D

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU) Click here

    D

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  3. CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (POWER MANAGEMENT CONTROL ECU MAIN WIRE)


    1. A01NF32E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 3 J/C) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  4. CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 3 J/C)


    1. Reconnect the power management control ECU connector.

    2. A01NDFUE99
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 to Power Management Control ECU (LHD)
      *4 to Power Management Control ECU (RHD)

      Disconnect the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      F67-6 (CANH) - F67-17 (CANL) Power switch off 108 to 132 Ω CAN No. 4 junction connector
      F67-7 (CANH) - F67-18 (CANL) Power switch off 108 to 132 Ω Power management control ECU (LHD)
      F67-9 (CANH) - F67-20 (CANL) Power switch off 108 to 132 Ω Power management control ECU (RHD)
      Result
      Result Proceed to
      OK A
      NG (to CAN No. 4 junction connector main wire) B
      NG (to Power management control ECU main wire) C

    B

    CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 4 J/C) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - POWER MANAGEMENT CONTROL ECU)

    A

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

  5. CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 4 J/C)


    1. Reconnect the CAN No. 3 junction connector.

    2. A01NEQLE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to CAN No. 3 Junction Connector
      *3 to CAN No. 5 Junction Connector

      Disconnect the CAN No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      F68-4 (CANH) - F68-15 (CANL) Power switch off 108 to 132 Ω CAN No. 3 junction connector
      F68-8 (CANH) - F68-19 (CANL) power switch off 108 to 132 Ω CAN No. 5 junction connector
      Result
      Result Proceed to
      OK A
      NG (to CAN No. 3 junction connector main wire) B
      NG (to CAN No. 5 junction connector main wire) C

    B

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 4 J/C)

    C

    CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 5 J/C) Click here

    A

    REPLACE CAN NO. 4 JUNCTION CONNECTOR

  6. CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 5 J/C)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. Reconnect the CAN No. 4 junction connector.

    2. A01NE7AE24
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to CAN No. 4 Junction Connector

      Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      P55-1 (CANH) - P55-2 (CANL) Power switch off 108 to 132 Ω CAN No. 4 junction connector

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 4 J/C - CAN NO. 5 J/C)

    OK

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

  7. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU)


    1. A01NF32E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  8. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C)


    1. Reconnect the power management control ECU connector.

    2. A01NEQLE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 to Power Management Control ECU

      Disconnect the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      F67-6 (CANH) - F67-17 (CANL) Power switch off 108 to 132 Ω CAN No. 4 junction connector
      F67-7 (CANH) - F67-18 (CANL) Power switch off 108 to 132 Ω Power management control ECU
      Result
      Result Proceed to
      OK A
      NG (to CAN No. 4 junction connector main wire) B
      NG (to Power management control ECU main wire) C

    B

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - POWER MANAGEMENT CONTROL ECU)

    A

  9. CHEKC FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C - SUSPENSION CONTROL ECU)

    Tech Tips

    For vehicles without the air suspension, go to the next step.


    1. Disconnect the suspension control ECU connector.

    2. A01NEQLE25
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Suspension Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F67-2 (CANH) - F67-13 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - SUSPENSION CONTROL ECU)

    OK

  10. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C - SEAT BELT CONTROL ECU)

    Tech Tips

    For vehicles without the pre-crash safety system, go to the next step.


    1. Disconnect the seat belt control ECU connector.

    2. A01NDFUE57
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Seat Belt Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F67-3 (CANH) - F67-14 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - SEAT BELT CONTROL ECU)

    OK

  11. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C - PARKING ASSIST ECU)

    Tech Tips

    For vehicles without the parking assist monitor system, go to the next step.


    1. Disconnect the parking assist ECU connector.

    2. A01NDFUE58
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Parking Assist ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F67-4 (CANH) - F67-15 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - PARKING ASSIST ECU)

    OK

  12. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C - CLEARANCE WARNING ECU)

    Tech Tips

    For vehicles without the LEXUS parking assist-sensor system, go to the next step.


    1. Disconnect the clearance warning ECU connector.

    2. A01NDFUE58
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Clearance Warning ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F67-4 (CANH) - F67-15 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - CLEARANCE WARNING ECU)

    OK

  13. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C)


    1. Reconnect the CAN No. 3 junction connector.

    2. A01NERPE03
      Text in Illustration
      *1

      Component with harness connector

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Result
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 54 to 69 Ω

      Note

      The resistance must be measured after the main wire connected ECU and junction connector are reconnected.


    NG

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

    OK

  14. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS)


    1. A01NERPE03
      Text in Illustration
      *1

      Component with harness connector

      (Power Management Control ECU)

      Connect the probes of an ohmmeter to terminals F97-34 (CA2H) and F97-35 (CA2L) of the power management control ECU.

    2. While observing the resistance value shown on the tester, reconnect the each ECU connector until the resistance becomes abnormal (Below 54 Ω).

    3. Replace the ECU that caused the total resistance to drop below 54 Ω when it was reconnected.

      Tech Tips

      If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.


    NEXT

    REPLACE CORRESPONDING ECU

  15. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C)


    1. Reconnect the CAN No. 3 junction connector.

    2. A01NEQLE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to CAN No. 3 Junction Connector
      *3 to CAN No. 5 Junction Connector

      Disconnect the CAN No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      F68-4 (CANH) - F68-15 (CANL) Power switch off 108 to 132 Ω CAN No. 3 junction connector
      F68-8 (CANH) - F68-19 (CANL) power switch off 108 to 132 Ω CAN No. 5 junction connector
      Result
      Result Proceed to
      OK A
      NG (to CAN No. 3 junction connector main wire) B
      NG (to CAN No. 5 junction connector main wire) C

    B

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 4 J/C)

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5) Click here

    A

  16. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C - AFS ECU)


    1. Disconnect the AFS ECU connector.

    2. A01NDFUE53
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to AFS ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F68-3 (CANH) - F68-14 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 4 J/C - AFS ECU)

    OK

  17. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C - DRIVING SUPPORT ECU)


    1. Disconnect the driving support ECU connector.

    2. A01NDFUE54
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to Driving Support ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F68-2 (CANH) - F68-13 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 4 J/C - DRIVING SUPPORT ECU)

    OK

  18. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C)


    1. Reconnect the CAN No. 4 junction connector.

    2. A01NERPE03
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)

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

      Note

      The resistance must be measured after the main wire connected ECU and junction connector are reconnected.

      Standard Resistance
      Tester Connection Switch Condition Result
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 54 to 69 Ω

    NG

    REPLACE CAN NO. 4 JUNCTION CONNECTOR

    OK

  19. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS)


    1. A01NERPE03
      Text in Illustration
      *1

      Component with harness connector

      (Power Management Control ECU)

      Connect the probes of an ohmmeter to terminals 34 (CA2H) and 35 (CA2L) of the power management control ECU.

    2. While observing the resistance value shown on the tester, reconnect the each ECU connector until the resistance becomes abnormal (Below 54 Ω).

    3. Replace the ECU that caused the total resistance to drop below 54 Ω when it was reconnected.

      Tech Tips

      If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.


    NEXT

    REPLACE CORRESPONDING ECU

  20. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. Reconnect the CAN No. 4 junction connector.

    2. A01NE7AE24
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to CAN No. 4 Junction Connector

      Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      P55-1 (CANH) - P55-2 (CANL) Power switch off 108 to 132 Ω CAN No. 4 junction connector
      Result
      Result Proceed to
      OK (w/ Active stabilizer suspension system) A
      OK (w/o Active stabilizer suspension system) B
      NG C

    B

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 4 J/C - CAN NO. 5 J/C)

    A

  21. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 5 J/C - FRONT ACTIVE STABILIZER CONTROL ECU)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. Disconnect the front active stabilizer control ECU connector.

    2. Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

    3. A01NE7AE25
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to Front Active Stabilizer Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P53-1 (CANH) - P53-2 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 5 J/C - FRONT ACTIVE STABILIZER CONTROL ECU)

    OK

  22. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 5 J/C - REAR ACTIVE STABILIZER CONTROL ECU)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. Disconnect the rear active stabilizer control ECU connector.

    2. Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

    3. A01NE7AE26
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to Rear Active Stabilizer Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P54-1 (CANH) - P54-2 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 5 J/C - REAR ACTIVE STABILIZER CONTROL ECU)

    OK

    REPLACE ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

  23. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU)


    1. A01NF32E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  24. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C)


    1. Reconnect the power management control ECU connector.

    2. A01NEQLE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 to Power Management Control ECU

      Disconnect the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      F67-6 (CANH) - F67-17 (CANL) Power switch off 108 to 132 Ω CAN No. 4 junction connector
      F67-9 (CANH) - F67-20 (CANL) Power switch off 108 to 132 Ω Power management control ECU
      Result
      Result Proceed to
      OK A
      NG (to CAN No. 4 junction connector main wire) B
      NG (to Power management control ECU main wire) C

    B

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - POWER MANAGEMENT CONTROL ECU)

    A

  25. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C - AFS ECU)


    1. Disconnect the AFS ECU connector.

    2. A01NEQLE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to AFS ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F67-8 (CANH) - F67-19 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - AFS ECU)

    OK

  26. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C - DRIVING SUPPORT ECU)


    1. Disconnect the driving support ECU connector.

    2. A01NEQLE06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Driving Support ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F67-7 (CANH) - F67-18 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - DRIVING SUPPORT ECU)

    OK

  27. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C)


    1. Reconnect the CAN No. 3 junction connector.

    2. A01NERPE03
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)

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

      Note

      The resistance must be measured after the main wire connected ECU and junction connector are reconnected.

      Standard Resistance
      Tester Connection Switch Condition Result
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 54 to 69 Ω

    NG

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

    OK

  28. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS)


    1. A01NERPE03
      Text in Illustration
      *1

      Component with harness connector

      (Power Management Control ECU)

      Connect the probes of an ohmmeter to terminals 34 (CA2H) and 35 (CA2L) of the power management control ECU.

    2. While observing the resistance value shown on the tester, reconnect the each ECU connector until the resistance becomes abnormal (Below 54 Ω).

    3. Replace the ECU that caused the total resistance to drop below 54 Ω when it was reconnected.

      Tech Tips

      If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.


    NEXT

    REPLACE CORRESPONDING ECU

  29. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C)


    1. Reconnect the CAN No. 3 junction connector.

    2. A01NEQLE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to CAN No. 3 Junction Connector
      *3 to CAN No. 5 Junction Connector

      Disconnect the CAN No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      F68-4 (CANH) - F68-15 (CANL) Power switch off 108 to 132 Ω CAN No. 3 junction connector
      F68-8 (CANH) - F68-19 (CANL) Power switch off 108 to 132 Ω CAN No. 5 junction connector
      Result
      Result Proceed to
      OK A
      NG (to CAN No. 3 junction connector main wire) B
      NG (to CAN No. 5 junction connector main wire) C

    B

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 4 J/C)

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5) Click here

    A

  30. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C - SUSPENSION CONTROL ECU)

    Tech Tips

    For vehicles without the air suspension, go to the next step.


    1. Disconnect the suspension control ECU connector.

    2. A01NEQLE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to Suspension Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F68-7 (CANH) - F68-18 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 4 J/C - SUSPENSION CONTROL ECU)

    OK

  31. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C - SEAT BELT CONTROL ECU)

    Tech Tips

    For vehicles without the pre-crash safety system, go to the next step.


    1. Disconnect the seat belt control ECU connector.

    2. A01NEQLE08
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to Seat Belt Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F68-5 (CANH) - F68-16 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 4 J/C - SEAT BELT CONTROL ECU)

    OK

  32. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C - PARKING ASSIST ECU)

    Tech Tips

    For vehicles without the parking assist monitor system, go to the next step.


    1. Disconnect the parking assist ECU connector.

    2. A01NEQLE09
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to Parking Assist ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F68-6 (CANH) - F68-17 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 4 J/C - PARKING ASSIST ECU)

    OK

  33. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C - CLEARANCE WARNING ECU)

    Tech Tips

    For vehicles without the LEXUS parking assist-sensor system, go to the next step.


    1. Disconnect the clearance warning ECU connector.

    2. A01NEQLE09
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to Clearance Warning ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F68-6 (CANH) - F68-17 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 4 J/C - CLEARANCE WARNING ECU)

    OK

  34. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 4 J/C)


    1. Reconnect the CAN No. 4 junction connector.

    2. A01NERPE03
      Text in Illustration
      *1

      Component with harness connector

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Result
      F97-34 (CA2H) - F97-35 (CA2L) Power switch off 54 to 69 Ω

      Note

      The resistance must be measured after the main wire connected ECU and junction connector are reconnected.


    NG

    REPLACE CAN NO. 4 JUNCTION CONNECTOR

    OK

  35. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS)


    1. A01NERPE03
      Text in Illustration
      *1

      Component with harness connector

      (Power Management Control ECU)

      Connect the probes of an ohmmeter to terminals F97-34 (CA2H) and F97-35 (CA2L) of the power management control ECU.

    2. While observing the resistance value shown on the tester, reconnect the each ECU connector until the resistance becomes abnormal (Below 54 Ω).

    3. Replace the ECU that caused the total resistance to drop below 54 Ω when it was reconnected.

      Tech Tips

      If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.


    NEXT

    REPLACE CORRESPONDING ECU

  36. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. Reconnect the CAN No. 4 junction connector.

    2. A01NE7AE24
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to CAN No. 4 Junction Connector

      Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition Connected to
      P55-1 (CANH) - P55-2 (CANL) Power switch off 108 to 132 Ω CAN No. 4 junction connector
      Result
      Result Proceed to
      OK (w/ Active stabilizer suspension system) A
      OK (w/o Active stabilizer suspension system) B
      NG C

    B

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 4 J/C - CAN NO. 5 J/C)

    A

  37. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 5 J/C - FRONT ACTIVE STABILIZER CONTROL ECU)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. Disconnect the front active stabilizer control ECU connector.

    2. Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

    3. A01NE7AE25
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to Front Active Stabilizer Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P53-1 (CANH) - P53-2 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 5 J/C - FRONT ACTIVE STABILIZER CONTROL ECU)

    OK

  38. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 5 J/C - REAR ACTIVE STABILIZER CONTROL ECU)


    1. Disconnect the rear active stabilizer control ECU connector.

    2. Disconnect the CAN bus main wire connector from the CAN No. 5 junction connector.

    3. A01NE7AE26
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to Rear Active Stabilizer Control ECU

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P54-1 (CANH) - P54-2 (CANL) Power switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CAN NO. 5 J/C - REAR ACTIVE STABILIZER CONTROL ECU)

    OK

    REPLACE ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

  39. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU)


    1. A01NDSPE02
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      F97-34 (CA2H) - F97-6 (E1) Power switch off 200 Ω or higher Inspection for CANH ground short
      F97-35 (CA2L) - F97-6 (E1) Power switch off 200 Ω or higher Inspection for CANL ground short
      F97-34 (CA2H) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F97-35 (CA2L) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 3 MAIN WIRE) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  40. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 3 MAIN WIRE)


    1. Reconnect the power management control ECU connector.

    2. A01NFVME03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 to Power Management Control ECU
      *4 DLC3

      Disconnect the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F67-6 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 4 junction connector
      F67-17 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-6 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-17 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F67-7 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Power management control ECU
      F67-18 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-7 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-18 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.

      Result
      Result Proceed to
      OK A
      NG (to CAN No. 4 junction connector main wire) B
      NG (to Power management control ECU main wire) C

    B

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 4 MAIN WIRE) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - POWER MANAGEMENT CONTROL ECU)

    A

  41. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 3 BRANCH WIRE)


    1. A01NFVME04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Suspension Control ECU
      *3 to Seat Belt Control ECU
      *4 to Parking Assist ECU or Clearance Warning ECU
      *5 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F67-2 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Suspension control ECU
      F67-13 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-2 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-13 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F67-3 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Seat belt control ECU
      F67-14 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-3 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-14 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F67-4 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short

      Parking assist ECU

      or

      Clearance warning ECU
      F67-15 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-4 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-15 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.


    NG

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS) Click here

    OK

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

  42. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 4 MAIN WIRE)


    1. A01NFVME05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to CAN No. 3 Junction Connector
      *3 to CAN No. 5 Junction Connector
      *4 DLC3

      Disconnect the CAN No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F68-4 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 3 junction connector
      F68-15 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-4 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-15 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F68-8 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 5 junction connector
      F68-19 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-8 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-19 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.

      Result
      Result Proceed to
      OK A
      NG (to CAN No. 3 junction connector main wire) B
      NG (to CAN No. 5 junction connector main wire) C

    B

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 4 J/C)

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5) Click here

    A

  43. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 4 BRANCH WIRE)


    1. A01NFVME06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to Driving Support ECU
      *3 to AFS ECU
      *4 DLC3

      Disconnect the CAN No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F68-2 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Driving support ECU
      F68-13 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-2 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-13 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F68-3 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short AFS ECU
      F68-14 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-3 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-14 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.


    NG

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS) Click here

    OK

    REPLACE CAN NO. 4 JUNCTION CONNECTOR

  44. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. A01NEZZE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 DLC3

      Disconnect the CAN No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      P55-1 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 4 junction connector
      P55-2 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      P55-1 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      P55-2 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      Result
      Result Proceed to
      OK (w/o Active stabilizer suspension system) A
      OK (w/ Active stabilizer suspension system) B
      NG C

    B

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 4 J/C - CAN NO. 5 J/C)

    A

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

  45. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU)


    1. A01NDSPE02
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      F97-34 (CA2H) - F97-6 (E1) Power switch off 200 Ω or higher Inspection for CANH ground short
      F97-35 (CA2L) - F97-6 (E1) Power switch off 200 Ω or higher Inspection for CANL ground short
      F97-34 (CA2H) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F97-35 (CA2L) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 3 MAIN WIRE) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  46. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 3 MAIN WIRE)


    1. Reconnect the power management control ECU connector.

    2. A01NFVME07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 to Power Management Control ECU
      *4 DLC3

      Disconnect the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F67-6 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 4 junction connector
      F67-17 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-6 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-17 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F67-9 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Power management control ECU
      F67-20 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-9 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-20 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.

      Result
      Result Proceed to
      OK A
      NG (to CAN No. 4 junction connector main wire) B
      NG (to Power management control ECU main wire) C

    B

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 4 MAIN WIRE) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - POWER MANAGEMENT CONTROL ECU)

    A

  47. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 3 BRANCH WIRE)


    1. A01NFVME08
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)
      *2 to Driving Support ECU
      *3 to AFS ECU
      *4 DLC3

      Disconnect the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F67-7 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Driving support ECU
      F67-18 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-7 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-18 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F67-8 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short AFS ECU
      F67-19 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F67-8 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F67-19 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.


    NG

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS) Click here

    OK

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

  48. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 4 MAIN WIRE)


    1. A01NFVME05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4 Junction Connector)
      *2 to CAN No. 3 Junction Connector
      *3 to CAN No. 5 Junction Connector
      *4 DLC3

      Disconnect the CAN No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F68-4 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 3 junction connector
      F68-15 (CANL) - F17-4 (CG) power switch off 200 Ω or higher Inspection for CANL ground short
      F68-4 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-15 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F68-8 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 5 junction connector
      F68-19 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-8 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-19 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.

      Result
      Result Proceed to
      OK A
      NG (to CAN No. 3 junction connector main wire) B
      NG (to CAN No. 5 junction connector main wire) C

    B

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 4 J/C)

    C

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5) Click here

    A

  49. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 4 BRANCH WIRE)


    1. A01NFVME09
      Text in Illustration
      *1

      Front view of wire harness connector

      (to CAN No. 4Junction Connector)
      *2 to Seat Belt Control ECU
      *3 to Parking Assist ECU or Clearance Warning ECU
      *4 to Suspension Control ECU
      *5 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      F68-5 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Seat belt control ECU
      F68-16 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-5 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-16 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F68-6 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short

      Parking assist ECU

      or

      Clearance warning ECU
      F68-17 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-6 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-17 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      F68-7 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short Suspension control ECU
      F68-18 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      F68-7 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F68-18 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for 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 CAN Bus Wire inspection.

      Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.


    NG

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS) Click here

    OK

    REPLACE CAN NO. 4 JUNCTION CONNECTOR

  50. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN J/C NO. 5)

    Tech Tips

    - The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.

    - Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    1. A01NEZZE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *2 to CAN No. 4 Junction Connector
      *3 DLC3

      Disconnect the CAN No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      P55-1 (CANH) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANH ground short CAN No. 4 junction connector
      P55-2 (CANL) - F17-4 (CG) Power switch off 200 Ω or higher Inspection for CANL ground short
      P55-1 (CANH) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      P55-2 (CANL) - F17-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short
      Result
      Result Proceed to
      OK (w/o Active stabilizer suspension system) A
      OK (w/ Active stabilizer suspension system) B
      NG C

    B

    CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS) Click here

    C

    REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (CAN NO. 4 J/C - CAN NO. 5 J/C)

    A

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

  51. CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (ECUS)


    1. Reconnect the connector for the bus wire that is shorted to +B or GND to the CAN junction connector (the connector that caused the bus wire resistance to change to 6 kΩ or higher (for +B short) or 200 Ω or higher (for ground short) when it was disconnected).

    2. Disconnect the ECU or sensor connected to the CAN bus wire that is shorted to +B or GND.

      Tech Tips

      If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus wires. To determine the ECU or sensor that is connected to the shorted bus wire, refer to the terminals of ECU tables Click here.

    3. A01NERPE04
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      F97-34 (CA2H) - F97-6 (E1) Power switch off 200 Ω or higher Inspection for CANH ground short
      F97-35 (CA2L) - F97-6 (E1) Power switch off 200 Ω or higher Inspection for CANL ground short
      F97-34 (CA2H) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANH +B short
      F97-35 (CA2L) - F98-7 (AM21) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Inspection for CANL +B short

      Tech Tips

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


    NG

    REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR

    OK

    REPLACE CORRESPONDING ECU