CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002

DTC Code DTC Name
U1002 Lost Communication with Gateway Module

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Note
U1002 Lost Communication with Gateway Module The network gateway ECU cannot receive signals from all ECUs that have been memorized as those connected to sub bus 19.

  • Open or short in sub bus 19 main lines or connector

  • Short in sub bus 19 branch lines or connector

  • Network gateway ECU

  • Skid Control ECU (Brake Actuator Assembly)

  • Absorber Control ECU

  • Power Steering ECU Assembly

  • Rear Steering Control ECU

  • Front Steering Control ECU

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

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

  • Open or short in No. 9 CAN junction connector

  • Open or short in No. 3 CAN junction terminal

Tech Tips

The network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 19.

Tech Tips

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

WIRING DIAGRAM

B0076C7E02
B0076C7E03

CAUTION / NOTICE / HINT

Note


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

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

    Click here

    Click here

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

    Click here

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

  • DTC check procedure: Turn the engine switch on (IG), wait at least 60 seconds, and then drive the vehicle at a speed of 60 km/h (37 mph) or more for 7 seconds or more.

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

    Click here

Tech Tips


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

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

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    CHECK SUB BUS 19 Click here

    A

  2. CHECK SUB BUS 19


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

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

      B0077XQC02
      *1 DLC3 - -
      *a

      Component with harness connected

      (No. 7 CAN Junction Connector)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O108-3 (CANH) - O108-14 (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
      O108-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O108-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O108-14 (CANL) - O8-16 (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

      • Short to ground

      • +B short

      		 D

    B

    CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    C

    CHECK FOR SHORT IN SUB BUS 19 LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    D

    CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 7 CAN JUNCTION CONNECTOR) Click here

    A

  3. CHECK FOR OPEN IN SUB BUS 19 LINES (NETWORK GATEWAY ECU BRANCH LINE)


    1. B0075DEC88
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-6 (CA3H) - O46-7 (CA3L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    NG

    CHECK FOR OPEN IN SUB BUS 19 LINES (NETWORK GATEWAY ECU BRANCH LINE) Click here

    OK

  4. CHECK FOR DTC OUTPUT


    1. Reconnect the O46 network gateway ECU connector.

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

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Clear the DTCs.


      Body Electrical > Gateway > Clear DTCs

    7. Turn the engine switch off.

    8. Turn the engine switch on (IG).

    9. Check for DTCs.


      Body Electrical > Gateway > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 is not output from the network gateway ECU (GTS display: Gateway) A
      DTC U1002 is output from the network gateway ECU (GTS display: Gateway) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE NETWORK GATEWAY ECU Click here

  5. CHECK FOR OPEN IN SUB BUS 19 LINES (NETWORK GATEWAY ECU BRANCH LINE)


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

      B0075E6C02
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      		 *b

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-6 (CA3H) - O108-6 (CANH) Cable disconnected from negative (-) battery terminal Below 1 Ω
      O46-7 (CA3L) - O108-17 (CANL) Cable disconnected from negative (-) battery terminal Below 1 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    NG

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

  6. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. B007332C01
      *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

  7. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (NO. 3 CAN JUNCTION TERMINAL)


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

    2. B0075JKC36
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Terminal)

      Disconnect the U55 No. 3 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U55-3 (CANH) - U55-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 3 CAN JUNCTION TERMINAL

    NG

  8. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the U55 No. 3 CAN junction terminal connector.

    2. B0076YHC33
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to Skid Control ECU (Brake Actuator Assembly)
      *c to No. 9 CAN Junction Connector

      Disconnect the O108 No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O108-3 (CANH) - O108-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      O108-4 (CANH) - O108-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Skid control ECU (brake actuator assembly) main lines) B
      NG (No. 9 CAN junction connector main lines) C

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

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

    C

  9. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (NO. 9 CAN JUNCTION CONNECTOR)


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

    2. B0076YHC34
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 7 CAN Junction Connector
      *c to No. 3 CAN Junction Terminal

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-5 (CANH) - U53-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 7 CAN junction connector
      U53-6 (CANH) - U53-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 3 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (No. 7 CAN junction connector main lines) B
      NG (No. 3 CAN junction terminal main lines) C

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION TERMINAL)

  10. CHECK FOR SHORT IN SUB BUS 19 LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. B007332C01
      *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

  11. CHECK FOR SHORT IN SUB BUS 19 LINES (NO. 3 CAN JUNCTION TERMINAL)


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

    2. B0075JKC37
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Terminal)

      Disconnect the U55 No. 3 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U55-3 (CANH) - U55-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 3 CAN JUNCTION TERMINAL

    NG

  12. CHECK FOR SHORT IN SUB BUS 19 LINES (NO. 7 CAN JUNCTION CONNECTOR)


    1. Reconnect the U55 No. 3 CAN junction terminal connector.

    2. B0076YHC35
      *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 No. 9 CAN Junction Connector
      *f to Absorber Control ECU
      *g to Network Gateway ECU

      Disconnect the O108 No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O108-1 (CANH) - O108-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Front steering control ECU
      O108-2 (CANH) - O108-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Power steering ECU assembly
      O108-3 (CANH) - O108-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      O108-4 (CANH) - O108-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      O108-5 (CANH) - O108-16 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU
      O108-6 (CANH) - O108-17 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Network gateway 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. 9 CAN junction connector main lines) D

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

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

    C

    GO TO STEP 14 Click here

    D

  13. CHECK FOR SHORT IN SUB BUS 19 LINES (NO. 9 CAN JUNCTION CONNECTOR)


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

    2. B0076YHC36
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 7 CAN Junction Connector
      *c to No. 3 CAN Junction Terminal
      *d to Rear Steering Control ECU

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-5 (CANH) - U53-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 7 CAN junction connector
      U53-6 (CANH) - U53-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 3 CAN junction terminal
      U53-7 (CANH) - U53-18 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher Rear steering control ECU
      Result
      Result Proceed to
      OK A
      NG (No. 7 CAN junction connector main lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 3 CAN junction terminal main lines) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION TERMINAL)

    C

  14. CHECK FOR SHORT IN SUB BUS 19 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. B00735YC02
      *a

      Component with harness connected

      (No. 7 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O108-3 (CANH) - O108-14 (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 BRANCH LINES OR CONNECTOR

  15. CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 7 CAN JUNCTION CONNECTOR)


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

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

      B0073LAC16
      *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 No. 9 CAN Junction Connector *f to Absorber Control ECU
      *g to Network Gateway ECU - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      O108-1 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Front steering control ECU
      O108-12 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Power steering ECU assembly
      O108-13 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Skid control ECU (brake actuator assembly)
      O108-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-4 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 9 CAN junction connector
      O108-15 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-5 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Absorber control ECU
      O108-16 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-6 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Network gateway ECU
      O108-17 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front steering control ECU
      O108-12 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Power steering ECU assembly
      O108-13 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Skid control ECU (brake actuator assembly)
      O108-14 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-4 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 9 CAN junction connector
      O108-15 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU
      O108-16 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O108-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      O108-17 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

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

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    GO TO STEP 17 Click here

    C

  16. CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 9 CAN JUNCTION CONNECTOR)


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

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

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

      B0073LAC17
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)

      		 *b to No. 7 CAN Junction Connector
      *c to No. 3 CAN Junction Terminal *d to Rear Steering Control ECU
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      U53-5 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 7 CAN junction connector
      U53-16 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-6 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 3 CAN junction terminal
      U53-17 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Rear steering control ECU
      U53-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 7 CAN junction connector
      U53-16 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 3 CAN junction terminal
      U53-17 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Rear steering control ECU
      U53-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 7 CAN junction connector main line) C
      NG (No. 3 CAN junction terminal main line) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 3 CAN JUNCTION TERMINAL) Click here

    B

  17. CHECK FOR SHORT IN SUB BUS 19 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. Measure the resistance according to the value(s) in the table below.

      B0077XQC03
      *1 DLC3 - -
      *a

      Component with harness connected

      (No. 7 CAN Junction Connector)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O108-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O108-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O108-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O108-14 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

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

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR CAN BUS LINE OR CONNECTOR

  18. CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 3 CAN JUNCTION TERMINAL)


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

    2. B00751QC14
      *1 DLC3
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Terminal)

      Disconnect the U55 No. 3 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      U55-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      U55-2 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U55-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      U55-2 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 3 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION TERMINAL)

  19. CHECK SUB BUS 19


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

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

      B0077XQC13
      *1 DLC3 - -
      *a

      Component with harness connected

      (No. 8 CAN Junction Connector)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O110-3 (CANH) - O110-14 (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
      O110-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O110-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O110-14 (CANL) - O8-16 (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

      • Short to ground

      • +B short

      		 D

    B

    CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    C

    CHECK FOR SHORT IN SUB BUS 19 LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here

    D

    CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 8 CAN JUNCTION CONNECTOR) Click here

    A

  20. CHECK FOR OPEN IN SUB BUS 19 LINES (NETWORK GATEWAY ECU BRANCH LINE)


    1. B0075DEC89
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the O46 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-6 (CA3H) - O46-7 (CA3L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    NG

    CHECK FOR OPEN IN SUB BUS 19 LINES (NETWORK GATEWAY ECU BRANCH LINE) Click here

    OK

  21. CHECK FOR DTC OUTPUT


    1. Reconnect the O46 network gateway ECU connector.

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

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Clear the DTCs.


      Body Electrical > Gateway > Clear DTCs

    7. Turn the engine switch off.

    8. Turn the engine switch on (IG).

    9. Check for DTCs.


      Body Electrical > Gateway > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 is not output from the network gateway ECU (GTS display: Gateway) A
      DTC U1002 is output from the network gateway ECU (GTS display: Gateway) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE NETWORK GATEWAY ECU Click here

  22. CHECK FOR OPEN IN SUB BUS 19 LINES (NETWORK GATEWAY ECU BRANCH LINE)


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

      B0075E6C03
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      		 *b

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O46-6 (CA3H) - O110-6 (CANH) Cable disconnected from negative (-) battery terminal Below 1 Ω
      O46-7 (CA3L) - O110-17 (CANL) Cable disconnected from negative (-) battery terminal Below 1 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    NG

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

  23. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. B007332C01
      *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

  24. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (NO. 3 CAN JUNCTION TERMINAL)


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

    2. B0075JKC36
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Terminal)

      Disconnect the U55 No. 3 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U55-3 (CANH) - U55-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 3 CAN JUNCTION TERMINAL

    NG

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


    1. Reconnect the U55 No. 3 CAN junction terminal connector.

    2. B0076YHC37
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b to Skid Control ECU (Brake Actuator Assembly)
      *c to No. 9 CAN Junction Connector

      Disconnect the O110 No. 8 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O110-3 (CANH) - O110-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      O110-4 (CANH) - O110-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Skid control ECU (brake actuator assembly) main lines) B
      NG (No. 9 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

  26. CHECK FOR OPEN IN SUB BUS 19 MAIN LINES (NO. 9 CAN JUNCTION CONNECTOR)


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

    2. B0076YHC34
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 8 CAN Junction Connector
      *c to No. 3 CAN Junction Terminal

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-5 (CANH) - U53-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 8 CAN junction connector
      U53-6 (CANH) - U53-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 3 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (No. 8 CAN junction connector main lines) B
      NG (No. 3 CAN junction terminal main lines) C

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION TERMINAL)

  27. CHECK FOR SHORT IN SUB BUS 19 LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. B007332C01
      *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

  28. CHECK FOR SHORT IN SUB BUS 19 LINES (NO. 3 CAN JUNCTION TERMINAL)


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

    2. B0075JKC37
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Terminal)

      Disconnect the U55 No. 3 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U55-3 (CANH) - U55-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 3 CAN JUNCTION TERMINAL

    NG

  29. CHECK FOR SHORT IN SUB BUS 19 LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the U55 No. 3 CAN junction terminal connector.

    2. B0076YHC38
      *a

      Front view of wire harness connector

      (to No. 8 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 No. 9 CAN Junction Connector
      *f to Absorber Control ECU
      *g to Network Gateway ECU

      Disconnect the O110 No. 8 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O110-1 (CANH) - O110-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Front steering control ECU
      O110-2 (CANH) - O110-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Power steering ECU assembly
      O110-3 (CANH) - O110-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Skid control ECU (brake actuator assembly)
      O110-4 (CANH) - O110-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      O110-5 (CANH) - O110-16 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Absorber control ECU
      O110-6 (CANH) - O110-17 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Network gateway 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. 9 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)

    C

    GO TO STEP 31 Click here

    D

  30. CHECK FOR SHORT IN SUB BUS 19 LINES (NO. 9 CAN JUNCTION CONNECTOR)


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

    2. B0076YHC36
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)
      *b to No. 8 CAN Junction Connector
      *c to No. 3 CAN Junction Terminal
      *d to Rear Steering Control ECU

      Disconnect the U53 No. 9 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U53-5 (CANH) - U53-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 8 CAN junction connector
      U53-6 (CANH) - U53-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 3 CAN junction terminal
      U53-7 (CANH) - U53-18 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher Rear steering control ECU
      Result
      Result Proceed to
      OK A
      NG (No. 8 CAN junction connector main lines) B
      NG (ECU or sensor branch lines) C
      NG (No. 3 CAN junction terminal main lines) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION TERMINAL)

    C

  31. CHECK FOR SHORT IN SUB BUS 19 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. B00735YC03
      *a

      Component with harness connected

      (No. 8 CAN Junction Connector)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O110-3 (CANH) - O110-14 (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 BRANCH LINES OR CONNECTOR

  32. CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 8 CAN JUNCTION CONNECTOR)


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

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

      B0073LAC43
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 8 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 No. 9 CAN Junction Connector *f to Absorber Control ECU
      *g to Network Gateway ECU - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      O110-1 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Front steering control ECU
      O110-12 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-2 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Power steering ECU assembly
      O110-13 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Skid control ECU (brake actuator assembly)
      O110-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-4 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 9 CAN junction connector
      O110-15 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-5 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Absorber control ECU
      O110-16 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-6 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Network gateway ECU
      O110-17 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front steering control ECU
      O110-12 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Power steering ECU assembly
      O110-13 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Skid control ECU (brake actuator assembly)
      O110-14 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-4 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 9 CAN junction connector
      O110-15 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Absorber control ECU
      O110-16 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      O110-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Network gateway ECU
      O110-17 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

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

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    GO TO STEP 34 Click here

    C

  33. CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 9 CAN JUNCTION CONNECTOR)


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

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

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

      B0073LAC17
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 9 CAN Junction Connector)

      		 *b to No. 8 CAN Junction Connector
      *c to No. 3 CAN Junction Terminal *d to Rear Steering Control ECU
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      U53-5 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 8 CAN junction connector
      U53-16 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-6 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 3 CAN junction terminal
      U53-17 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-7 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Rear steering control ECU
      U53-18 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U53-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 8 CAN junction connector
      U53-16 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 3 CAN junction terminal
      U53-17 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U53-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Rear steering control ECU
      U53-18 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

      Result
      Result Proceed to
      OK A
      NG (ECU or sensor branch line) B
      NG (No. 8 CAN junction connector main line) C
      NG (No. 3 CAN junction terminal main line) D

    A

    REPLACE NO. 9 CAN JUNCTION CONNECTOR

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 3 CAN JUNCTION TERMINAL) Click here

    B

  34. CHECK FOR SHORT IN SUB BUS 19 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. Measure the resistance according to the value(s) in the table below.

      B0077XQC04
      *1 DLC3 - -
      *a

      Component with harness connected

      (No. 8 CAN Junction Connector)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result
      O110-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      O110-14 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      O110-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      O110-14 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

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

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR CAN BUS LINE OR CONNECTOR

  35. CHECK FOR SHORT IN SUB BUS 19 LINE (NO. 3 CAN JUNCTION TERMINAL)


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

    2. B00751QC14
      *1 DLC3
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Terminal)

      Disconnect the U55 No. 3 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      U55-3 (CANH) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      U55-2 (CANL) - O8-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U55-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      U55-2 (CANL) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 19 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 19 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 3 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION TERMINAL)