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Inspection Procedure

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (TURN SIGNAL LIGHT) 
    1. Select the ACTIVE TEST, use the intelligent tester (with CAN VIM) to generate a control command, and then check that the turn signal light illuminates.

      Driver side junction block ECU 

      ACTIVE TEST DETAIL - DRIVER SIDE JUNCTION BLOCK ECU

      Item Test Details Diagnostic Note
      TRN SIG LGT L Turn signal light operation / ON or OFF -
      TRN SIG LGT R Turn signal light operation / ON or OFF -

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

    NG: Go to Next step 

  2. INSPECT FRONT TURN SIGNAL LIGHT ASSEMBLY 
    Fig 1: Identifying Front Turn Signal Light Connector Terminals
    G05292621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the front turn signal light.
    2. Apply battery voltage to the front turn signal light connector and check that the front turn signal light illuminates.

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1      		 Front turn signal light illuminates

    NG: REPLACE FRONT TURN SIGNAL LIGHT ASSEMBLY 

    OK: Go to Next step 

  3. INSPECT REAR COMBINATION LIGHT ASSEMBLY (TURN SIGNAL LIGHT) 
    1. Remove the rear combination light.
      Fig 2: Identifying Rear Combination Light Connector Terminals
      G05292622Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the front turn signal light connector and check that the turn signal light illuminates.

      OK 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 4      		 Turn signal light illuminates

    NG: REPLACE REAR COMBINATION LIGHT ASSEMBLY 

    OK: Go to Next step 

  4. INSPECT TURN SIGNAL FLASHER ASSEMBLY 
    1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 3.
    2. Connect the 2 turn signal light bulbs parallel to each other to terminals 1 and 2, and check that the bulbs flash.

      OK: Bulbs flash. 

      HINT:

      • The turn signal lights should flash 60 to 120 times per minute.
      • If one of the front or rear turn signal lights has an open circuit, the number of flashes will be more than 140 per minute.
        Fig 3: Inspecting Turn Signal Flasher Assembly
        G05292623Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE TURN SIGNAL FLASHER ASSEMBLY 

    OK: Go to Next step 

  5. CHECK WIRE HARNESS (FLASHER - ECU AND BODY GROUND) 
    Fig 4: Identifying Turn Signal Flasher And Driver Side Junction Block ECU Connector Terminals
    G05292624Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T15 flasher connector.
    2. Disconnect the 2E junction block connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      T15-1 - 2E-13 (TURN LH) Below 1 Ω
      T13-2 - 2E-18 (TURN RH) Below 1 Ω
      T15-3 - Body ground Below 1 Ω
      T15-1 - Body ground 10 kΩ or higher
      T15-2 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to Next step 

  6. CHECK WIRE HARNESS (LIGHT - ECU AND BODY GROUND) 
    1. Disconnect the F7*1 or F8*2 light connector.

      HINT:

      *1: LH

      *2: RH

    2. Disconnect the 2D junction block connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance: 

      LH 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      F7-2 - 2D-2 (TURN LH) Below 1 Ω
      F7-1 - Body ground Below 1 Ω
      F7-2 - Body ground 10 kΩ or higher

      RH 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      F8-2 - 2D-6 (TURN RH) Below 1 Ω
      F8-1 - Body ground Below 1 Ω
      F8-2 - Body ground 10 kΩ or higher
      Fig 5: Identifying Front Turn Signal Light And Driver Side Junction Block ECU Connector Terminals
      G05292625Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to Next step 

  7. CHECK WIRE HARNESS (LIGHT - ECU AND BODY GROUND) 
    1. Disconnect the R6*1 or R7*2 light connector.

      HINT:

      *1: LH

      *2: RH

    2. Disconnect the 2E junction block connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance: 

      LH 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      R6-2 - 2E-13 (TURN LH) Below 1 Ω
      R6-4 - Body ground Below 1 Ω
      R6-2 - Body ground 10 kΩ or higher

      RH 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      R7-2 - 2E-18 (TURN RH) Below 1 Ω
      R7-4 - Body ground Below 1 Ω
      R7-2 - Body ground 10 kΩ or higher
      Fig 6: Identifying Rear Combination Light And Driver Side Junction Block ECU Connector Terminals
      G05292626Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

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