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Inspection Procedure

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  1. CHECK WHETHER LIGHTS ILLUMINATE 
    1. Check whether the following lights illuminate: front side marker lights, rear taillights, side marker lights and license plate light.

      Result 

      RESULT REFERENCE

      Result Proceed to
      All lights do not illuminate A
      Front side marker lights do not illuminate B
      Rear taillights do not illuminate C
      License plate light does not illuminate D
      Rear side marker light do not illuminate. E

    B:  Go to step  8

    C:  Go to step  10

    D:  Go to step  11

    E:  Go to step  12

    A: Go to next step 

  2. INSPECT FUSE (TAIL) 
    1. Remove the TAIL fuse from the instrument panel junction block.
    2. Measure the resistance of the fuse.

      Standard resistance: 

      Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go to next step 

  3. CHECK WIRE HARNESS (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK) 
    1. Disconnect the IG instrument panel junction block connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Specified Condition
      IG-1 - Body ground 10 to 14 V
      Fig 1: Checking Wire Harness (Battery - Instrument Panel Junction Block)
      G05585966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  4. CHECK WIRE HARNESS (MAIN BODY ECU - HEADLIGHT DIMMER SWITCH) 
    Fig 2: Identifying E15 Main Body ECU And E12 Headlight Dimmer Switch Connector Terminals
    G05585967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E15 main body ECU connector.
    2. Disconnect the E12 headlight dimmer switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      E15-21 (TAIL) - E12-18 (T) Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  5. CHECK WIRE HARNESS (BATTERY - HEADLIGHT DIMMER SWITCH) 
    1. Connect the E15 main body ECU connector.
    2. Disconnect the E12 headlight dimmer switch connector.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Specified Condition
      E12-18 (T) - Body ground 10 to 14 V
      Fig 3: Checking Wire Harness (Battery - Headlight Dimmer Switch)
      G05585968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK 

    OK: Go to next step 

  6. CHECK WIRE HARNESS (HEADLIGHT DIMMER SWITCH - BODY GROUND) 
    1. Disconnect the E12 headlight dimmer switch connector.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      E12-12 (EL) - Body ground Below 1 Ω
      Fig 4: Checking Wire Harness (Headlight Dimmer Switch - Body Ground)
      G05585969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  7. INSPECT HEADLIGHT DIMMER SWITCH 
    1. Remove the headlight dimmer switch.
    2. Measure the resistance of the switch.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      18 (T) - 12 (EL) OFF 10 kΩ or higher
      18 (T) - 12 (EL) TAIL Below 1 Ω
      Fig 5: Identifying Headlight Dimmer Switch Connector Terminals
      G05585970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE HEADLIGHT DIMMER SWITCH 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK 

  8. CHECK INSTRUMENT PANEL JUNCTION BLOCK (TAILLIGHT RELAY) 
    1. Disconnect the IB instrument panel junction block connector.
    2. Measure the voltage of the junction block.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Condition Specified Condition
      Junction block IB terminal 15-Body ground Light control switch TAIL 10 to 14 V
      Fig 6: Locating IB Instrument Panel Junction Block Connector
      G05585971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK 

    OK: Go to next step 

  9. CHECK WIRE HARNESS (TAILLIGHT RELAY - FRONT SIDE MARKER LIGHT AND BODY GROUND) 
    1. Disconnect the A12 and A24 front side marker light connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      A12-4 - Body ground Light control switch on (TAIL) 10 to 14 V
      A24-4 - Body ground Light control switch on (TAIL) 10 to 14 V
      Fig 7: Identifying A12 And A24 Front Side Marker Light Connectors
      G05585972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      A12-1 - Body ground Below 1 Ω
      A24-1 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE BULB 

  10. CHECK WIRE HARNESS (MAIN BODY ECU - REAR COMBINATION LIGHT) 
    1. Disconnect the K12 and K14 rear combination light connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Condition Specified Condition
      K14-2 - Body ground Light control switch on (TAIL) 10 to 14 V
      K12-2 - Body ground Light control switch on (TAIL) 10 to 14 V
      Fig 8: Identifying K12 And K14 Rear Combination Light Connector Terminals
      G05585973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      K14-1 - Body ground Below 1 Ω
      K12-1 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE REAR COMBINATION LIGHT 

  11. CHECK WIRE HARNESS (MAIN BODY ECU - LICENSE PLATE LIGHT AND BODY GROUND) 
    1. Disconnect the Q6 license plate light connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Condition Specified Condition
      Q6-2 - Body ground Light control switch on (TAIL) 10 to 14 V

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      Q6-1 - Body ground Below 1 Ω
      Fig 9: Identifying Q6 License Plate Light Connector Terminals
      G05585974Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE BULB 

  12. CHECK WIRE HARNESS (MAIN BODY ECU - REAR COMBINATION LIGHT) 
    1. Disconnect the K12 and K14 rear combination light connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Condition Specified Condition
      K14-2 - Body ground Light control switch on (TAIL) 10 to 14 V
      K12-2 - Body ground Light control switch on (TAIL) 10 to 14 V
      Fig 10: Identifying K12 And K14 Rear Combination Light Connector Terminals
      G05585973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      K14-1 - Body ground Below 1 Ω
      K12-1 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE BULB 

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