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Home >> Lexus >> 2006 >> LS 430 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostics >> CHECK CAN BUS LINES FOR SHORT CIRCUIT (w/o LEXUS Navigation System) >> Inspection Procedure

Inspection Procedure

  1. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC3 SUB BUS LINE) 
    Fig 1: Disconnecting DLC3 Sub Bus Line Connector (J42) From D-CAN J/C B Side (W/O Earth Terminal)
    G03003512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the ignition switch to the LOCK position.
    2. Disconnect the DLC3 sub bus line connector (J42) from the D-CAN J/C B side (w/o earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 2: Identifying DLC3 Connector terminals
      G03003513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 1 MΩ or more

    NG: REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

    OK: GO TO NEXT STEP 

  2. CONNECT CONNECTOR 
    1. Reconnect the DLC3 sub bus line connector (J42) to the D-CAN J/C B side (w/o earth terminal).
  3. CHECK CAN BUS LINES FOR SHORT CIRCUIT (CAN BUSES TO P-CAN J/C) 
    Fig 3: Disconnecting CAN Main Bus Line Connector (J45) From P-CAN J/C A Side (W/Earth Terminal)
    G03003514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the CAN main bus line connector (J45) from the P-CAN J/C A side (w/earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 4: Identifying DLC3 Connector terminals
      G03003515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 108 to 132 Ω

    OK: Go to step   26 

    NG: GO TO NEXT STEP 

  4. CONNECT CONNECTOR 
    1. Reconnect the CAN main bus line connector (J45) to the P-CAN J/C A side (w/earth terminal).
  5. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SUSPENSION CONTROL ECU SUB BUS LINE) 
    Fig 5: Disconnecting Suspension Control ECU Sub Bus Line Connector (J38) From D-CAN J/C A Side (W/Earth Terminal)
    G03003516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: For vehicles without electronic modulated air suspension, go to step  7.
    1. Disconnect the suspension control ECU sub bus line connector (J38) from the D-CAN J/C A side (w/earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 6: Identifying DLC3 Connector terminals
      G03003517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   16 

    NG: GO TO NEXT STEP 

  6. CONNECT CONNECTOR 
    1. Reconnect the suspension control ECU sub bus line connector (J38) to the D-CAN J/C A side (w/earth terminal).
  7. CHECK CAN BUS LINES FOR SHORT CIRCUIT (GATEWAY ECU SUB BUS LINE) 
    Fig 7: Disconnecting Gateway ECU Sub Bus Line Connector (J36) From D-CAN J/C A Side (W/Earth Terminal)
    G03003518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the gateway ECU sub bus line connector (J36) from the D-CAN J/C A side (w/earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 8: Identifying DLC3 Connector terminals
      G03003519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   18 

    NG: GO TO NEXT STEP 

  8. CONNECT CONNECTOR 
    1. Reconnect the gateway ECU sub bus line connector (J36) to the D-CAN J/C A side (w/earth terminal).
  9. CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM SUB BUS LINE) 
    Fig 9: Disconnecting ECM Sub Bus Line Connector (J40) From D-CAN J/C B Side (W/O Earth Terminal)
    G03003520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the ECM sub bus line connector (J40) from the D-CAN J/C B side (w/o earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 10: Identifying DLC3 Connector terminals
      G03003521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   20 

    NG: GO TO NEXT STEP 

  10. CONNECT CONNECTOR 
    1. Reconnect the ECM sub bus line connector (J40) to the D-CAN J/C B side (w/o earth terminal).
  11. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU SUB BUS LINE) 
    Fig 11: Disconnecting Skid Control ECU Sub Bus Line Connector (J41) From D-CAN J/C B Side (W/O Earth Terminal)
    G03003522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the skid control ECU sub bus line connector (J41) from the D-CAN J/C B side (w/o earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 12: Identifying DLC3 Connector terminals
      G03003523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   22 

    NG: GO TO NEXT STEP 

  12. CONNECT CONNECTOR 
    1. Reconnect the skid control ECU sub bus line connector (J41) to the D-CAN J/C B side (w/o earth terminal).
  13. CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING SENSOR SUB BUS LINE) 
    Fig 13: Disconnecting Steering Sensor Sub Bus Line Connector (J43) From D-CAN J/C B Side (W/O Earth Terminal)
    G03003524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the steering sensor sub bus line connector (J43) from the D-CAN J/C B side (w/o earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 14: Identifying DLC3 Connector terminals
      G03003525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   24 

    NG: GO TO NEXT STEP 

  14. CONNECT CONNECTOR 
    1. Reconnect the steering sensor sub bus line connector (J43) to the D-CAN J/C B side (w/o earth terminal).
  15. CHECK CAN BUS LINES FOR SHORT CIRCUIT (D-CAN J/C) 
    Fig 15: Disconnecting CAN Main Bus Line Connector (J37) From D-CAN J/C A Side (W/Earth Terminal)
    G03003526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the CAN main bus line connector (J37) from the D-CAN J/C A side (w/earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 16: Identifying DLC3 Connector terminals
      G03003527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 108 to 132 Ω

    NG: REPLACE JUNCTION CONNECTOR (D-CAN J/C) 

    OK: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (D-CAN J/C - P-CAN J/C) 

  16. CONNECT CONNECTOR 
    1. Reconnect the suspension control ECU sub bus line connector (J38) to the D-CAN J/C A side (w/earth terminal).
  17. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SUSPENSION CONTROL ECU SUB BUS LINE) 
    Fig 17: Identifying DLC3 Connector terminals
    G03003528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the suspension control ECU connector (A20).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE SUSPENSION CONTROL ECU (SEE  REPLACEMENT  ) 

    NG: REPAIR OR REPLACE SUSPENSION CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

  18. CONNECT CONNECTOR 
    1. Reconnect the gateway ECU sub bus line connector (J36) to the D-CAN J/C A side (w/earth terminal).
  19. CHECK CAN BUS LINES FOR SHORT CIRCUIT (GATEWAY ECU SUB BUS LINE) 
    Fig 18: Identifying DLC3 Connector terminals
    G03003529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the gateway ECU sub bus line connector (G3).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    GATEWAY ECU SUB BUS LINE CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE GATEWAY ECU 

    NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

  20. CONNECT CONNECTOR 
    1. Reconnect the ECM sub bus line connector (J40) to the D-CAN J/C B side (w/o earth terminal).
  21. CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM SUB BUS LINE) 
    Fig 19: Identifying DLC3 Connector terminals
    G03003530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the ECM connector (E3).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    ECM CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE ECM (SEE  REPLACEMENT  ) 

    NG: REPAIR OR REPLACE ECM SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

  22. CONNECT CONNECTOR 
    1. Reconnect the skid control ECU sub bus line connector (J41) to the D-CAN J/C B side (w/earth terminal).
  23. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU SUB BUS LINE) 
    Fig 20: Identifying DLC3 Connector terminals
    G03003531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the skid control ECU connector (S42).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    SKID CONTROL ECU SUB BUS LINE CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (SEE  REPLACEMENT  ) 

    NG: REPAIR OR REPLACE SKID CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

  24. CONNECT CONNECTOR 
    1. Reconnect the steering sensor sub bus line connector (J43) to the D-CAN J/C B side (w/o earth terminal).
  25. CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING SENSOR SUB BUS LINE) 
    Fig 21: Identifying DLC3 Connector terminals
    G03003532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the steering sensor connector (S16).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    STEERING SENSOR CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE STEERING SENSOR (SEE  REPLACEMENT  ) 

    NG: REPAIR OR REPLACE STEERING SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CNA-L) 

  26. CONNECT CONNECTOR 
    1. Reconnect the CAN main bus line connector (J45) to the P-CAN J/C A side (w/earth terminal).
  27. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU SUB BUS LINE) 
    NOTE: For vehicles without dynamic laser cruise control, go to step  29.
    Fig 22: Disconnecting Distance Control ECU Sub Bus Line Connector (J48) From P-CAN J/C B Side (W/O Earth Terminal)
    G03003533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the distance control ECU sub bus line connector (J48) from the P-CAN J/C B side (w/o earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 23: Identifying DLC3 Connector terminals
      G03003534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DLC3 CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   30 

    NG: GO TO NEXT STEP 

  28. CONNECT CONNECTOR 
    1. Reconnect the distance control ECU sub bus line connector (J48) to the P-CAN J/C B side (w/o earth terminal).
  29. CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR SUB BUS LINE) 
    Fig 24: Disconnecting Yaw Rate Sensor Sub Bus Line Connector (J44) From P-CAN J/C A Side (W/Earth Terminal)
    G03003535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the yaw rate sensor sub bus line connector (J44) from the P-CAN J/C A side (w/earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
      Fig 25: Identifying DLC3 Connector terminals
      G03003536Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    YAW RATE SENSOR SUB BUS LINE CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: Go to step   32 

    NG: REPLACE JUNCTION CONNECTOR (P-CAN J/C) 

  30. CONNECT CONNECTOR 
    1. Reconnect the distance control ECU sub bus line connector (J48) to the P-CAN J/C B side (w/o earth terminal).
  31. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU SUB BUS LINE) 
    Fig 26: Identifying DLC3 Connector terminals
    G03003537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the distance control ECU connector (D2).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    DISTANCE CONTROL ECU CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE DISTANCE CONTROL ECU ASSY (SEE  REPLACEMENT  ) 

    NG: REPAIR OR REPLACE DISTANCE CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

  32. CONNECT CONNECTOR 
    1. Reconnect the yaw rate sensor sub bus line connector (J44) to the P-CAN J/C A side (w/earth terminal).
  33. CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR SUB BUS LINE) 
    Fig 27: Identifying DLC3 Connector terminals
    G03003538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the yaw rate sensor connector (Y1).
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified value
    D1-6 (CANH) - D1-14 (CANL) Ignition Switch OFF 54 to 69 Ω

    OK: REPLACE YAW RATE SENSOR (SEE  REPLACEMENT  ) 

    NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

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