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Door Courtesy Light Circuit: Procedure

  1. CHECK OPERATION OF COURTESY LIGHT AND OUTER SCUFF LIGHT 
    1. When a door is opened, check that the following lights illuminate.

      Result

      Result Proceed to
      Courtesy or outer scuff light (front door LH) does not illuminate A
      Courtesy or outer scuff light (front door RH) does not illuminate B
      Courtesy light (rear door LH) does not illuminate C
      Courtesy light (rear door RH) does not illuminate D

    D → See step   15 

    C → See step   12 

    B → See step   7 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the courtesy light illuminates.
      DRIVER DOOR (MULTIPLEX NETWORK DOOR ECU FRONT LH)

      Item Test Details Diagnostic Note
      Courtesy Lamp Courtesy light ON / OFF -

      Result

      Result Proceed to
      OK A
      When courtesy light does not illuminate B
      When scuff light does not illuminate C

    C → See step   5 

    B → See step   3 

    A → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  3. REPLACE COURTESY LIGHT (FRONT DOOR LH) 
    1. Temporarily replace the courtesy light (front door LH) with a new or normally functioning one.
    2. Check that the courtesy light illuminates.

      OK

      Courtesy light illuminates.

    OK → END 

    NG: Go to next step 

  4. CHECK WIRE HARNESS (DOOR ECU FRONT LH - COURTESY LIGHT (FRONT DOOR LH)) 
    1. Disconnect the M9 ECU connector.
      Fig 1: Identifying M9 ECU Connector And Q15 Light Connector
      GTY108243Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the Q15 light connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      M9-12 (CTYB) - Q15-2 Below 1 Ω
      M9-11 (CYL) - Q15-1 Below 1 Ω
      M9-12 (CTYB) or Q15-2 - Body ground 10 kΩ or higher
      M9-11 (CYL) or Q15-1 - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

  5. REPLACE OUTER SCUFF LIGHT (FRONT DOOR LH) 
    1. Temporarily replace the outer scuff light (front door LH) with a new or normally functioning one.
    2. Check that the outer scuff light illuminates.

      OK

      Outer scuff light illuminates.

    OK → END 

    NG: Go to next step 

  6. CHECK WIRE HARNESS (DOOR ECU FRONT LH - OUTER SCUFF LIGHT (FRONT DOOR LH)) 
    1. Disconnect the M9 ECU connector.
      Fig 2: Identifying M9 ECU Connector And Q14 Light Connector
      GTY108244Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the Q14 light connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      M9-12 (CTYB) - Q14-2 Below 1 Ω
      M9-11 (CYL) - Q14-1 Below 1 Ω
      M9-12 (CTYB) or Q14-2 - Body ground 10 kΩ or higher
      M9-11 (CYL) or Q14-1 - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

  7. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the courtesy light (front door RH) illuminates.
      PASSENGER DOOR (MULTIPLEX NETWORK DOOR ECU FRONT RH)

      Item Test Details Diagnostic Note
      Courtesy Lamp Courtesy light ON / OFF -

      Result

      Result Proceed to
      OK A
      When courtesy light does not illuminate B
      When scuff light does not illuminate C

    C → See step   10 

    B → See step   8 

    A → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  8. REPLACE COURTESY LIGHT (FRONT DOOR RH) 
    1. Temporarily replace the courtesy light (front door RH) with a new or normally functioning one.
    2. Check that the courtesy light illuminates.

      OK

      Courtesy light illuminates.

    OK → END 

    NG: Go to next step 

  9. CHECK WIRE HARNESS (DOOR ECU FRONT RH - COURTESY LIGHT (FRONT DOOR RH)) 
    1. Disconnect the M4 ECU connector.
      Fig 3: Identifying M4 ECU Connector And Q8 Light Connector
      GTY108241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the Q8 light connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      M4-12 (CTYB) - Q8-2 Below 1 Ω
      M4-11 (CYL) - Q8-1 Below 1 Ω
      M4-12 (CTYB) or Q8-2 - Body ground 10 kΩ or higher
      M4-11 (CYL) or Q8-1 - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

  10. REPLACE OUTER SCUFF LIGHT (FRONT DOOR RH) 
    1. Temporarily replace the outer scuff light (front door RH) with a new or normally functioning one.
    2. Check that the outer scuff light illuminates.

      OK

      Outer scuff light illuminates.

    OK → END 

    NG: Go to next step 

  11. CHECK WIRE HARNESS (DOOR ECU FRONT RH - OUTER SCUFF LIGHT (FRONT DOOR RH)) 
    1. Disconnect the M4 ECU connector.
      Fig 4: Identifying M4 ECU Connector And Q7 Light Connector
      GTY100458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the Q7 light connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      M4-12 (CTYB) - Q7-2 Below 1 Ω
      M4-11 (CYL) - Q7-1 Below 1 Ω
      M4-12 (CTYB) or Q7-2 - Body ground 10 kΩ or higher
      M4-11 (CYL) or Q7-1 - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

  12. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the courtesy light illuminates.
      REAR LEFT DOOR (MULTIPLEX NETWORK DOOR ECU REAR LH)

      Item Test Details Diagnostic Note
      Courtesy Lamp Courtesy light ON / OFF -

    NG → See step   13 

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

  13. REPLACE COURTESY LIGHT (REAR DOOR LH) 
    1. Temporarily replace the courtesy light (rear door LH) with a new or normally functioning one.
    2. Check that the courtesy light illuminates.

      OK

      Courtesy light illuminates.

    OK → END 

    NG: Go to next step 

  14. CHECK WIRE HARNESS (DOOR ECU REAR LH - COURTESY LIGHT (REAR DOOR LH)) 
    1. Disconnect the O7 ECU connector.
      Fig 5: Identifying O7 ECU Connector And S6 Light Connector
      GTY100542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the S6 light connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      O7-12 (CTYB) - S6-2 Below 1 Ω
      O7-11 (CYL) - S6-1 Below 1 Ω
      O7-12 (CTYB) or S6-2 - Body ground 10 kΩ or higher
      O7-11 (CYL) or S6-1 - 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. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the courtesy light illuminates.
      REAR RIGHT DOOR (MULTIPLEX NETWORK DOOR ECU REAR RH)

      Item Test Details Diagnostic Note
      Courtesy Lamp Courtesy light ON / OFF -

    NG → See step   16 

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

  16. REPLACE COURTESY LIGHT (REAR DOOR RH) 
    1. Temporarily replace the courtesy light (rear door RH) with a new or normally functioning one.
    2. Check that the courtesy light illuminates.

      OK

      Courtesy light illuminates.

    OK → END 

    NG: Go to next step 

  17. CHECK WIRE HARNESS (DOOR ECU REAR RH - COURTESY LIGHT (REAR DOOR RH)) 
    1. Disconnect the O3 ECU connector.
      Fig 6: Identifying O3 ECU Connector And S2 Light Connector
      GTY108242Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the S2 light connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      O3-12 (CTYB) - S2-2 Below 1 Ω
      O3-11 (CYL) - S2-1 Below 1 Ω
      O3-12 (CTYB) or S2-2 - Body ground 10 kΩ or higher
      O3-11 (CYL) or S2-1 - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

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