CAN COMMUNICATION SYSTEM, Diagnostic DTC:U0129, U0130, U0131

DTC Code DTC Name
U0129 Lost Communication with Skid Control ECU
U0130 Lost Communication with VGRS
U0131 Lost Communication with Power Steering Control Module

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0129 Lost Communication with Skid Control ECU

  • The power steering ECU assembly does not receive data from the skid control ECU (brake actuator assembly).

  • The front steering control ECU does not receive data from the skid control ECU (brake actuator assembly).

  • Open or short in V3 bus main lines or connector

  • Open or short in V3 bus branch lines or connector

  • Power source circuit of skid control ECU (brake actuator assembly)

  • Skid control ECU (brake actuator assembly)

  • Power source circuit of power steering ECU assembly

  • Power steering ECU assembly

  • Power source circuit of front steering control ECU

  • Front steering control ECU

  • Open or short in No. 7 CAN junction connector

  • Open or short in No. 8 CAN junction connector

  • Open or short in No. 14 CAN junction connector

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.
U0130 Lost Communication with VGRS

  • The skid control ECU (brake actuator assembly) does not receive data from the front steering control ECU.

  • The absorber control ECU does not receive data from the front steering control ECU.

  • Open or short in V3 bus main lines or connector

  • Open or short in V3 bus branch lines or connector

  • Power source circuit of skid control ECU (brake actuator assembly)

  • Skid control ECU (brake actuator assembly)

  • Power source circuit of front steering control ECU

  • Front steering control ECU

  • Power source circuit of absorber control ECU

  • Absorber control ECU

  • Open or short in No. 7 CAN junction connector

  • Open or short in No. 8 CAN junction connector

  • Open or short in No. 14 CAN junction connector

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.
U0131 Lost Communication with Power Steering Control Module The front steering control ECU does not receive data from the power steering ECU assembly.

  • Open or short in V3 bus main lines or connector

  • Open or short in V3 bus branch lines or connector

  • Power source circuit of power steering ECU assembly

  • power steering ECU assembly

  • Power source circuit of front steering control ECU

  • Front steering control ECU

  • Open or short in No. 7 CAN junction connector

  • Open or short in No. 8 CAN junction connector

  • Open or short in No. 14 CAN junction connector

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

Tech Tips

This diagnosis procedure is for when DTC U0129, U0130 and U0131 are output at the same time.

WIRING DIAGRAM

A001L92E06
A001IKOE04

CAUTION / NOTICE / HINT

Note


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

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

    Click here

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

    Click here

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

  • DTC check procedure: Turn the engine switch on (IG) and wait at least 60 seconds.

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

    Click here

Tech Tips


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

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

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    RECONFIRM DTC OUTPUT Click here

    A

  2. RECONFIRM DTC OUTPUT


    1. Reconfirm DTCs.

      Tech Tips


      • If only the absorber control ECU outputs DTC U0130 and other ECUs connected to V3 bus do not output DTCs, troubleshoot DTC U0132 and check the branch circuit of V3 bus.

      • If both the absorber control ECU and skid control ECU (brake actuator assembly) output DTC U0130 but other ECUs connected to V3 bus do not output DTCs, troubleshoot DTC U0130 and check the branch circuit of V3 bus.

      Result
      Result Proceed to
      The power steering ECU assembly outputs DTC U0129 and other DTCs. A
      If both the absorber control ECU and skid control ECU (brake actuator assembly) output DTC U0130 but other ECUs connected to V3 bus do not output DTCs. B
      If only the absorber control ECU outputs DTC U0130 and other ECUs connected to V3 bus do not output DTCs. C

    B

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    C

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    A

  3. CHECK V3 BUS


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

    2. A001J1DC01
      *1 DLC3
      *a

      Rear view of harness connector

      (to No. 7 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K115-2 (CANH) - K115-13 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or higher: Open circuit in main bus lines
      K115-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K115-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K115-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K115-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus lines B
      Short circuit between bus lines C

      • Ground short

      • +B short

      		 D

    B

    CHECK FOR OPEN IN V3 BUS MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    C

    CHECK FOR SHORT IN V3 BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    D

    CHECK FOR SHORT IN V3 BUS LINE (NO. 7 CAN JUNCTION CONNECTOR) Click here

    A

  4. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.

    6. Turn the engine switch off.

    7. Turn the engine switch on (IG).

    8. Check for DTCs.

      Result
      Result Proceed to
      The ECUs connected to V3 bus do not output DTCs. A
      The ECUs connected to V3 bus output DTCs. B

    A

    SYMPTOM SIMULATION Click here

    B

    GO TO DTC COMBINATION TABLE Click here

  5. CHECK FOR OPEN IN V3 BUS MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. A001HVYC56
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Disconnect the A15 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-15 (CA2H) - A15-3 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here

    NG

  6. CHECK FOR OPEN IN V3 BUS MAIN LINES (POWER STEERING ECU ASSEMBLY)


    1. Reconnect the A15 skid control ECU (brake actuator assembly) connector.

    2. B003U8OC26
      *a

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A19 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A19-4 (CA3H) - A19-6 (CA3L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  7. CHECK FOR OPEN IN V3 BUS MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR))


    1. Reconnect the A19 power steering ECU assembly connector.

    2. A001JC8C22
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to Power Steering ECU Assembly
      *c to Skid Control ECU (Brake Actuator Assembly)

      Disconnect the K115 No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K115-2 (CANH) - K115-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Power steering ECU assembly
      K115-3 (CANH) - K115-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      Result
      Result Proceed to
      OK A
      NG (Power steering ECU assembly main lines) B
      NG (Skid control ECU (brake actuator assembly) main lines) C

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (POWER STEERING ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - NO. 7 CAN JUNCTION CONNECTOR)

  8. CHECK FOR SHORT IN V3 BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. A001HVYC58
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Disconnect the A15 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-15 (CA2H) - A15-3 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here

    NG

  9. CHECK FOR SHORT IN V3 BUS LINES (POWER STEERING ECU ASSEMBLY)


    1. Reconnect the A15 skid control ECU (brake actuator assembly) connector.

    2. A001KZ9C27
      *a

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A19 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A19-4 (CA3H) - A19-6 (CA3L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  10. CHECK FOR SHORT IN V3 BUS LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the A19 power steering ECU assembly connector.

    2. A001ISFC01
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to Front Steering Control ECU
      *c to Power Steering ECU Assembly
      *d to Skid Control ECU (Brake Actuator Assembly)
      *e to Absorber Control ECU

      Disconnect the K115 No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K115-1 (CANH) - K115-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Front steering control ECU
      K115-2 (CANH) - K115-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Power steering ECU assembly
      K115-3 (CANH) - K115-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      K115-5 (CANH) - K115-16 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU
      Result
      Result Proceed to
      OK A
      NG (Power steering ECU assembly main lines) B
      NG (Skid control ECU (brake actuator assembly) main lines) C
      NG (ECU or sensor branch lines) D

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (POWER STEERING ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - NO. 7 CAN JUNCTION CONNECTOR)

    D

  11. CHECK FOR SHORT IN V3 BUS LINES (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A001KMZC38
      *a

      Rear view of harness connector

      (to No. 7 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K115-2 (CANH) - K115-13 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Tech Tips

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

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINES OR CONNECTOR

  12. CHECK FOR SHORT IN V3 BUS LINE (NO. 7 CAN JUNCTION CONNECTOR)


    1. Disconnect the K115 No. 7 CAN junction connector.

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

      A001IVGC35
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)

      		 *b to Front Steering Control ECU
      *c to Power Steering ECU Assembly *d to Skid Control ECU (Brake Actuator Assembly)
      *e to Absorber Control ECU - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K115-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Front steering control ECU
      K115-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K115-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Power steering ECU assembly
      K115-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K115-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Skid control ECU (brake actuator assembly)
      K115-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K115-5 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Absorber control ECU
      K115-16 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K115-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front steering control ECU
      K115-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K115-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Power steering ECU assembly
      K115-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K115-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Skid control ECU (brake actuator assembly)
      K115-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K115-5 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU
      K115-16 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check V3 Bus inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check V3 Bus inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    NG

  13. CHECK FOR SHORT IN V3 BUS LINE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A001J1DC02
      *1 DLC3
      *a

      Rear view of harness connector

      (to No. 7 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K115-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K115-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K115-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K115-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check V3 Bus inspection.

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

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check V3 Bus inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR

  14. RECONFIRM DTC OUTPUT


    1. Reconfirm DTCs.

      Tech Tips


      • If only the absorber control ECU outputs DTC U0130 and other ECUs connected to V3 bus do not output DTCs, troubleshoot DTC U0132 and check the branch circuit of V3 bus.

      • If both the absorber control ECU and skid control ECU (brake actuator assembly) output DTC U0130 but other ECUs connected to V3 bus do not output DTCs, troubleshoot DTC U0130 and check the branch circuit of V3 bus.

      Result
      Result Proceed to
      The power steering ECU assembly outputs DTC U0129 and other DTCs. A
      If both the absorber control ECU and skid control ECU (brake actuator assembly) output DTC U0130 but other ECUs connected to V3 bus do not output DTCs. B
      If only the absorber control ECU outputs DTC U0130 and other ECUs connected to V3 bus do not output DTCs. C

    B

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    C

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    A

  15. CHECK V3 BUS


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

    2. A001J1DC06
      *1 DLC3
      *a

      Rear view of harness connector

      (to No. 8 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K116-3 (CANH) - K116-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or higher: Open circuit in main bus lines
      K116-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K116-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K116-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K116-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus lines B
      Short circuit between bus lines C

      • Ground short

      • +B short

      		 D

    B

    CHECK FOR OPEN IN V3 BUS MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    C

    CHECK FOR SHORT IN V3 BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    D

    CHECK FOR SHORT IN V3 BUS LINE (NO. 8 CAN JUNCTION CONNECTOR) Click here

    A

  16. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.

    6. Turn the engine switch off.

    7. Turn the engine switch on (IG).

    8. Check for DTCs.

      Result
      Result Proceed to
      The ECUs connected to V3 bus do not output DTCs. A
      The ECUs connected to V3 bus output DTCs. B

    A

    SYMPTOM SIMULATION Click here

    B

    GO TO DTC COMBINATION TABLE Click here

  17. CHECK FOR OPEN IN V3 BUS MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. A001HVYC56
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Disconnect the A15 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-15 (CA2H) - A15-3 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here

    NG

  18. CHECK FOR OPEN IN V3 BUS MAIN LINES (POWER STEERING ECU ASSEMBLY)


    1. Reconnect the A15 skid control ECU (brake actuator assembly) connector.

    2. B003U8OC26
      *a

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A19 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A19-4 (CA3H) - A19-6 (CA3L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  19. CHECK FOR OPEN IN V3 BUS MAIN LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the A19 power steering ECU assembly connector.

    2. A001JC8C02
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b to Skid Control ECU (Brake Actuator Assembly)
      *c to No. 14 CAN Junction Connector

      Disconnect the K116 No. 8 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K116-3 (CANH) - K116-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      K116-4 (CANH) - K116-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 14 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Skid control ECU (brake actuator assembly) main lines) B
      NG (No. 14 CAN junction connector main lines) C

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - NO. 8 CAN JUNCTION CONNECTOR)

    C

  20. CHECK FOR OPEN IN V3 BUS MAIN LINES (NO. 14 CAN JUNCTION CONNECTOR)


    1. Reconnect the K116 No. 8 CAN junction connector.

    2. A001KCRC06
      *a

      Front view of wire harness connector

      (to No. 14 CAN Junction Connector)
      *b to No. 8 CAN Junction Connector
      *c to Power Steering ECU Assembly

      Disconnect the Q57 No. 14 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q57-5 (CANH) - Q57-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 8 CAN junction connector
      Q57-6 (CANH) - Q57-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Power steering ECU assembly
      Result
      Result Proceed to
      OK A
      NG (No. 8 CAN junction connector main lines) B
      NG (Power steering ECU assembly main lines) C

    A

    REPLACE NO. 14 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (POWER STEERING ECU ASSEMBLY - NO. 14 CAN JUNCTION CONNECTOR)

  21. CHECK FOR SHORT IN V3 BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. A001HVYC58
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Disconnect the A15 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-15 (CA2H) - A15-3 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here

    NG

  22. CHECK FOR SHORT IN V3 BUS LINES (POWER STEERING ECU ASSEMBLY)


    1. Reconnect the A15 skid control ECU (brake actuator assembly) connector.

    2. A001KZ9C27
      *a

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A19 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A19-4 (CA3H) - A19-6 (CA3L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  23. CHECK FOR SHORT IN V3 BUS LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the A19 power steering ECU assembly connector.

    2. A001ISFC02
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b to Front Steering Control ECU
      *c to Skid Control ECU (Brake Actuator Assembly)
      *d to No. 14 CAN Junction Connector
      *e to Absorber Control ECU

      Disconnect the K116 No. 8 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K116-1 (CANH) - K116-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Front steering control ECU
      K116-3 (CANH) - K116-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      K116-4 (CANH) - K116-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 14 CAN junction connector
      K116-5 (CANH) - K116-16 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU
      Result
      Result Proceed to
      OK A
      NG (Skid control ECU (brake actuator assembly) main lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 14 CAN junction connector main lines) D

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - NO. 8 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN V3 BUS LINES (NO. 14 CAN JUNCTION CONNECTOR) Click here

    C

  24. CHECK FOR SHORT IN V3 BUS LINES (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A001KMZC39
      *a

      Rear view of harness connector

      (to No. 8 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K116-3 (CANH) - K116-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Tech Tips

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

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINES OR CONNECTOR

  25. CHECK FOR SHORT IN V3 BUS LINES (NO. 14 CAN JUNCTION CONNECTOR)


    1. Reconnect the K116 No. 8 CAN junction connector.

    2. A001KCRC06
      *a

      Front view of wire harness connector

      (to No. 14 CAN Junction Connector)
      *b to No. 8 CAN Junction Connector
      *c to Power Steering ECU Assembly

      Disconnect the Q57 No. 14 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q57-5 (CANH) - Q57-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 8 CAN junction connector
      Q57-6 (CANH) - Q57-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Power steering ECU assembly
      Result
      Result Proceed to
      OK A
      NG (No. 8 CAN junction connector main lines) B
      NG (Power steering ECU assembly main lines) C

    A

    REPLACE NO. 14 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (POWER STEERING ECU ASSEMBLY - NO. 14 CAN JUNCTION CONNECTOR)

  26. CHECK FOR SHORT IN V3 BUS LINE (NO. 8 CAN JUNCTION CONNECTOR)


    1. Disconnect the K116 No. 8 CAN junction connector.

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

      A001IVGC42
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)

      		 *b to Front Steering Control ECU
      *c to Skid Control ECU (Brake Actuator Assembly) *d to No. 14 CAN Junction Connector
      *e to Absorber Control ECU - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K116-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Front steering control ECU
      K116-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K116-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Skid control ECU (brake actuator assembly)
      K116-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K116-4 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 14 CAN junction connector
      K116-15 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K116-5 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Absorber control ECU
      K116-16 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K116-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front steering control ECU
      K116-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K116-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Skid control ECU (brake actuator assembly)
      K116-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K116-4 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 14 CAN junction connector
      K116-15 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K116-5 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU
      K116-16 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check V3 Bus inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check V3 Bus inspection.

      Result
      Result Proceed to
      OK A
      NG (No. 14 CAN junction connector main line) B
      NG (ECU or sensor bus line) C

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN V3 BUS LINE (ECU, SENSOR) Click here

    B

  27. CHECK FOR SHORT IN V3 BUS LINE (NO. 14 CAN JUNCTION CONNECTOR)


    1. Reconnect the K116 No. 8 CAN junction connector.

    2. Disconnect the Q57 No. 14 CAN junction connector.

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

      A001IVGC76
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 14 CAN Junction Connector)

      		 *b to No. 8 CAN Junction Connector
      *c to Power Steering ECU Assembly - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      Q57-5 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 8 CAN junction connector
      Q57-16 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q57-6 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Power steering ECU assembly
      Q57-17 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      Q57-5 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 8 CAN junction connector
      Q57-16 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q57-6 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Power steering ECU assembly
      Q57-17 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check V3 Bus inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check V3 Bus inspection.

      Result
      Result Proceed to
      OK A
      NG (No. 8 CAN junction connector main line) B
      NG (Power steering ECU assembly main line) C

    A

    REPLACE NO. 14 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR)

    C

  28. CHECK FOR SHORT IN V3 BUS LINE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A001J1DC05
      *1 DLC3
      *a

      Rear view of harness connector

      (to No. 8 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K116-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      K116-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      K116-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K116-14 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check V3 Bus inspection.

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

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check V3 Bus inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR