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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER 
    1. Select the ACTIVE TEST, use the intelligent tester (with CAN VIM) to generate a control command, and then check that each light illuminates.

      Driver side junction block ECU 

      ACTIVE TEST DETAIL - DRIVER SIDE JUNCTION BLOCK ECU

      Item Test Details Diagnostic Note
      ILLUMI OUTPUT Illumination entry ON / OFF -

      OK: Illumination entry turns on. 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    NG: Go to Next step 

  2. CHECK CIGARETTE LIGHTER ASSEMBLY 
    1. Check that the cigarette lighter illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  15

    OK: Go to Next step 

  3. CHECK OUTER MIRROR SWITCH ASSEMBLY 
    1. Check that the outer mirror switch illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  17

    OK: Go to Next step 

  4. CHECK PATTERN SELECT SWITCH ASSEMBLY 
    1. Check that the pattern select switch illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  19

    OK: Go to Next step 

  5. CHECK RADIO RECEIVER ASSEMBLY 
    1. Check that the radio receiver illumination turns on.

      OK: illumination turns on. 

    NG: Go to step  21

    OK: Go to Next step 

  6. CHECK GLOVE BOX LIGHT ASSEMBLY 
    1. Check that the glove box light turns on.

      OK: Illumination turns on. 

    NG: Go to step  23

    OK: Go to Next step 

  7. CHECK VSC OFF SWITCH 
    1. Check that the VSC OFF switch illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  27

    OK: Go to Next step 

  8. CHECK A/C CONTROL ASSEMBLY 
    1. Check that the A/C control illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  29

    OK: Go to Next step 

  9. CHECK SHIFT POSITION INDICATOR 
    1. Check that the shift position indicator illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  31

    OK: Go to Next step 

  10. CHECK AUDIO DOOR CONTROL SWITCH 
    1. Check that the audio door control switch illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  33

    OK: Go to Next step 

  11. CHECK SEAT HEATER SWITCH 
    1. Check that the seat heater switch illumination turns on.

      OK: Illumination turns on. 

    NG: Go to step  35

    OK: Go to Next step 

  12. CHECK MULTI-DISPLAY 
    1. Check that the multi-display illumination turns on.

      OK: Illumination turns on. 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    NG: Go to Next step 

  13. INSPECT MULTI-DISPLAY 
    1. Remove the multi-display.
    2. Apply battery voltage to the multi-display connector and check that the multi-display illuminates.
      Fig 1: Identifying Multi-Display Connector Terminals
      G05292689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 11      		 Multi-display illuminates

    NG: REPLACE MULTI-DISPLAY JUNCTION BLOCK 

    OK: Go to Next step 

  14. CHECK WIRE HARNESS (MULTI-DISPLAY - ECU AND BODY GROUND) 
    Fig 2: Identifying Driver Side Junction Block ECU And Multi-Display Connector Terminals
    G05292690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M5 multi-display connector.
    2. Disconnect the 2F junction block connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      M5-1 - 2F-10(PANEL2) Below 1 Ω
      M5-11 - Body ground Below 1 Ω
      M5-1 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  15. INSPECT CIGARETTE LIGHTER ASSEMBLY 
    Fig 3: Identifying Cigarette Lighter Connector Terminals
    G05292691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the cigarette lighter.
    2. Apply battery voltage to the multi-display connector and check that the cigarette lighter illuminates.

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 1      		 Cigarette lighter illuminates

    NG: REPLACE CIGARETTE LIGHTER ASSEMBLY 

    OK: Go to Next step 

  16. CHECK WIRE HARNESS (LIGHTER - ECU) 
    Fig 4: Identifying Driver Side Junction Block ECU And Cigarette Lighter Connector Terminals
    G05292692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C7 lighter connector.
    2. Disconnect the 2F junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      C7-7 - D5-6 (TR1) Below 1 Ω
      C7-3 - 2F-10 (PANEL2) Below 1 Ω
      C7-7 - Body ground 10 kΩ or higher
      C7-3 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  17. INSPECT OUTER MIRROR SWITCH ASSEMBLY 
    1. Remove the outer mirror switch.
    2. Apply battery voltage to the outer mirror switch connector and check that the outer mirror switch illuminates.

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 5
      Battery negative (-) → Terminal 6      		 Outer mirror switch illuminates
      Fig 5: Identifying Outer Mirror Switch Connector Terminals
      G05292693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE OUTER MIRROR SWITCH ASSEMBLY 

    OK: Go to Next step 

  18. CHECK WIRE HARNESS (SWITCH - ECU) 
    Fig 6: Identifying Driver Side Junction Block ECU And Outer Mirror Switch Connector Terminals
    G05292694Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R4 switch connector.
    2. Disconnect the 2E junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      R4-5 - 2E-15 (PANEL2) Below 1 Ω
      R4-6 - D5-7 (TR2) Below 1 Ω
      R4-5 - Body ground 10 kΩ or higher
      R4-6 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  19. INSPECT PATTERN SELECT SWITCH ASSEMBLY 
    1. Remove the pattern select switch.
    2. Apply battery voltage to the pattern select switch connector and check that the pattern select switch illuminates.
      Fig 7: Identifying Pattern Select Switch Connector Terminals
      G05292695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 4      		 Pattern select switch illuminates

    NG: REPLACE PATTERN SELECT SWITCH ASSEMBLY 

    OK: Go to Next step 

  20. CHECK WIRE HARNESS (SWITCH - ECU) 
    Fig 8: Identifying Driver Side Junction Block ECU And Pattern Select Switch Connector Terminals
    G05292696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E11 switch connector.
    2. Disconnect the 2E junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E11-2 - 2E-7 (PANEL2) Below 1 Ω
      E11-4 - D5-18 (TR3) Below 1 Ω
      E11-2 - Body ground 10 kΩ or higher
      E11-4 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  21. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Remove the radio receiver.
    2. Apply battery voltage to the radio receiver connector and check that the radio receiver illuminates.
      Fig 9: Identifying Radio Receiver Connector Terminals
      G05292697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 14      		 Radio receiver illuminates

    NG: REPLACE RADIO RECEIVER ASSEMBLY 

    OK: Go to Next step 

  22. CHECK WIRE HARNESS (RECEIVER - ECU) 
    Fig 10: Identifying Driver Side Junction Block ECU And Radio Receiver Connector Terminals
    G05292698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R3 receiver connector.
    2. Disconnect the 2E junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      R3-12 - D5-13(TR+) Below 1 Ω
      R3-2 - 2E-5 (PANEL2) Below 1 Ω
      R3-12 - Body ground 10 kΩ or higher
      R3-2 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  23. INSPECT GLOVE BOX LIGHT ASSEMBLY 
    1. Remove the glove box light.
    2. Apply battery voltage to the glove box light connector and check that the glove box light illuminates.
      Fig 11: Identifying Glove Box Light Connector Terminals
      G05292699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2      		 Glove box light illuminates

    NG: REPLACE GLOVE BOX LIGHT ASSEMBLY 

    OK: Go to Next step 

  24. INSPECT GLOVE BOX LIGHT SWITCH 
    1. Remove the glove box light switch.
      Fig 12: Identifying Glove Box Light Switch Connector Terminals
      G05292700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      1 - 2 Glove box light switch ON Below 1 Ω
      1 - 2 Glove box light switch OFF 10 kΩ or higher

    NG: REPLACE GLOVE BOX LIGHT SWITCH 

    OK: Go to Next step 

  25. CHECK WIRE HARNESS (GLOVE BOX LIGHT - ECU) 
    Fig 13: Identifying Driver Side Junction Block ECU And Glove Box Light Connector Terminals
    G05292701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G4 light connector.
    2. Disconnect the G5 switch connector.
    3. Disconnect the 2F junction block connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      G4-1 - 2F-10(PANEL2) Below 1 Ω
      G4-2 - G5-1 Below 1 Ω
      G4-1 - Body ground 10 kΩ or higher
      G4-2 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to Next step 

  26. CHECK WIRE HARNESS (GLOVE SWITCH - BOX LIGHT AND BODY GROUND) 
    Fig 14: Identifying Glove Box Light And Glove Box Light Switch Connector Terminals
    G05292702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G4 light connector.
    2. Disconnect the G5 switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      G5-1 - G4-2 Below 1 Ω
      G5-2 - Body ground Below 1 Ω
      G5-1 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  27. INSPECT VSC OFF SWITCH ASSEMBLY 
    1. Remove the VSC OFF switch.
    2. Apply battery voltage to the VSC OFF switch connector and check that the VSC off switch illuminates.
      Fig 15: Identifying VSC OFF Switch Connector Terminals
      G05292703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4      		 VSC off switch illuminates

    NG: REPLACE VSC OFF SWITCH 

    OK: Go to Next step 

  28. CHECK WIRE HARNESS (VSC OFF SWITCH - ECU) 
    Fig 16: Identifying Driver Side Junction Block ECU And VSC OFF Switch Connector Terminals
    G05292704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the V7 switch connector.
    2. Disconnect the 2F junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      V7-4 - D5-12 (TR+) Below 1 Ω
      V7-3 - 2F-10 (PANEL2) Below 1 Ω
      V7-4 - Body ground 10 kΩ or higher
      V7-3 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  29. INSPECT A/C CONTROL ASSEMBLY 
    1. Remove the A/C control.
    2. Apply battery voltage to the A/C control connector and check that the A/C control illuminates.
      Fig 17: Identifying A/C Control Assembly Connector Terminals
      G05292705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal A10-10
      Battery negative (-) → Terminal A9-1      		 A/C control illuminates

    NG: REPLACE A/C CONTROL ASSEMBLY 

    OK: Go to Next step 

  30. CHECK WIRE HARNESS (A/C CONTROL - ECU) 
    Fig 18: Identifying Driver Side Junction Block ECU And A/C Control Assembly Connector Terminals
    G05292706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A9 and A10 A/C control connector.
    2. Disconnect the 2F junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      A9-1 - D5-12 (TR+) Below 1 Ω
      A10-10 - 2F-10(PANEL2) Below 1 Ω
      A9-1 - Body ground 10 kΩ or higher
      A10-10 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  31. INSPECT SHIFT POSITION INDICATOR 
    1. Remove the shift position indicator.
    2. Apply battery voltage to the shift position indicator connector and check that the shift position indicator illuminates.
      Fig 19: Identifying Shift Position Indicator Connector Terminals
      G05292707Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1      		 Shift position indicator illuminates

    NG: REPLACE SHIFT POSITION INDICATOR 

    OK: Go to Next step 

  32. CHECK WIRE HARNESS (SHIFT POSITION INDICATOR - ECU) 
    Fig 20: Identifying Driver Side Junction Block ECU And Shift Position Indicator Connector Terminals
    G05292708Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A13 shift position indicator connector.
    2. Disconnect the 2F junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      A13-1 - D5-12 (TR+) Below 1 Ω
      A13-2 - 2F-10 (PANEL2) Below 1 Ω
      A13-1 - Body ground 10 kΩ or higher
      A13-2 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  33. INSPECT AUDIO DOOR CONTROL SWITCH 
    1. Remove the audio door control switch.
    2. Apply battery voltage to the audio door control switch connector and check that the audio door control switch illuminates.
      Fig 21: Identifying Audio Door Control Switch Connector Terminals
      G05292709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 5
      Battery negative (-) → Terminal 1      		 Audio door control switch illuminates

    NG: REPLACE AUDIO DOOR CONTROL SWITCH 

    OK: Go to Next step 

  34. CHECK WIRE HARNESS (AUDIO DOOR CONTROL SWITCH - ECU) 
    Fig 22: Identifying Driver Side Junction Block ECU And Audio Door Control Switch Connector Terminals
    G05292710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A25 switch connector.
    2. Disconnect the 2F junction block connector.
    3. Disconnect the D5 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      A25-1 - D5-12 (TR+) Below 1 Ω
      A25-5 - 2F-10 (PANEL2) Below 1 Ω
      A25-1 - Body ground 10 kΩ or higher
      A25-5 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  35. INSPECT SEAT HEATER SWITCH 
    1. Remove the seat heater switch.
    2. Apply battery voltage to the seat heater switch connector and check that the seat heater switch illuminates.
      Fig 23: Identifying Seat Heater Switch Connector Terminals
      G05292711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 7
      Battery negative (-) → Terminal 6      		 Seat heater switch illuminates

    NG: REPLACE SEAT HEATER SWITCH 

    OK: Go to Next step 

  36. CHECK WIRE HARNESS (SEAT HEATER SWITCH - ECU AND BODY GROUND) 
    Fig 24: Identifying Driver Side Junction Block ECU And Seat Heater Switch Connector Terminals
    G05292712Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S3 switch connector.
    2. Disconnect the 2F junction block connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S3-7 - 2F-10 (PANEL1) Below 1 Ω
      S3-6 - Body ground Below 1 Ω
      S3-7 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

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