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Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER 
    1. Connect the intelligent tester (with CAN VIM) to the DLC3.
    2. Turn the ignition switch to the ON position and press the intelligent tester main switch ON.
    3. Select the item below in the ACTIVE TEST and then check the relay operation.

      Main body ECU 

      ACTIVE TEST REFERENCE (MAIN BODY ECU)

      Item Test Details Diagnostic Note
      HEADLIGHT HI Turn headlight dimmer relay (Headlight dimmer switch HI position): ON / OFF -

      OK: Headlight (HIGH) comes on. 

    OK: Go to step   10 

    NG: Go TO NEXT STEP. 

  2. CHECK HEADLIGHT (LOW) 
    1. Check that the headlight (LOW) comes on when the light control switch is on (HEAD).

      OK: Headlight (LOW) comes on. 

    NG: GO TO  HEADLIGHT RELAY CIRCUIT  

    OK: Go TO NEXT STEP. 

  3. INSPECT FUSE (HEAD LH, HEAD RH) 
    1. Remove the HEAD LH fuse and HEAD RH fuse from the engine room No. 2 relay block.
    2. Measure the resistance of the fuses.

      Standard resistance: 

      Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go TO NEXT STEP. 

  4. INSPECT DAYTIME RUNNING LIGHT RELAY (Marking: DRL NO. 2, DRL NO. 3, DRL NO. 4) 
    1. Remove the No. 2 relay, No. 3 relay and No. 4 relay from the engine room No. 2 relay block.
    2. Measure the resistance of the relays.

      Standard resistance: 

      No. 2, No. 4 

      RESISTANCE SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω
      (Battery voltage applied to terminals 1 and 2)

      No. 3 

      RESISTANCE SPECIFIED CONDITION

      Tester Connection Specified Condition
      4 - 5 Below 1 Ω
      4 - 5 10 kΩ or higher
      (Battery voltage applied to terminals 1 and 2)
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω
      (Battery voltage applied to terminals 1 and 2)
      Fig 1: Identifying Daytime Running Light Relays (Marking: DRL No. 2, 3 & 4)
      G04490749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE DAYTIME RUNNING LIGHT RELAY 

    OK: Go TO NEXT STEP. 

  5. INSPECT HEADLIGHT BULB (HIGH) 
    1. Remove the headlight bulb (HIGH).
    2. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, then check that the bulb illuminates.
      Fig 2: Battery Connection To Headlight Bulb (HIGH) Terminals
      G04490750Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE HEADLIGHT BULB (HIGH) 

    OK: Go TO NEXT STEP. 

  6. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY) 
    1. Disconnect the E16 main body ECU connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      E16-3 (DIM) - Body ground 10 to 14 V
      Fig 3: Identifying E16 Main Body ECU Connector Terminals
      G04490751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go TO NEXT STEP. 

  7. CHECK WIRE HARNESS (MAIN BODY ECU) 
    1. Remove the headlight relay from the engine room No. 2 relay block.
    2. Disconnect the E15 main body ECU connector.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      E15-20 (HRLY) - Body ground 10 to 14 V
      Fig 4: Identifying E15 Main Body ECU Connector Terminals
      G04490752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go TO NEXT STEP. 

  8. CHECK WIRE HARNESS (HEADLIGHT RELAY - NO. 3 DAYTIME RUNNING LIGHT RELAY AND BODY GROUND) 
    1. Remove the No. 3 daytime running light relay from the engine room No. 2 relay block.
    2. Measure the voltage and resistance of the relay block.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      Relay block No. 3 daytime running light relay terminal 1 - Body ground Light control switch ON (HEAD)
      Dimmer switch position LOW      		 10 to 14 V

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Relay block No. 3 daytime running light relay terminal 2 - Body ground Below 1 Ω
      Fig 5: Locating No. 3 Daytime Running Light Relay
      G04490753Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go TO NEXT STEP. 

  9. CHECK WIRE HARNESS (BATTERY - NO. 2 DAYTIME RUNNING LIGHT RELAY, BULB AND BODY GROUND) 
    1. Remove the No. 2 daytime running light relay from the engine room No. 2 relay block.
    2. Remove the A14 and A22 headlight bulb connectors.
    3. Measure the voltage and resistance of the relay block.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Relay block No. 2 daytime running light relay terminal 5 - Body ground 10 to 14 V

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      Relay block No. 2 daytime running light relay terminal 3 - A14-2 Always Below 1 Ω
      Relay block No. 2 daytime running light relay terminal 3 - Body ground Always 10 kΩ or higher
      A14-1 - A22-1 Always Below 1 Ω
      A14-1 or A22-1 - Body ground Always 10 kΩ or higher
      A22-2 - Body ground Always Below 1 Ω
      Relay block No. 2 daytime running light relay terminal 3 - A22-2 Light control switch ON (HEAD)
      Dimmer switch position LOW      		 Below 1 Ω
      Relay block No. 2 daytime running light relay terminal 3 - Body ground Light control switch ON (HEAD)
      Dimmer switch position LOW      		 10 kΩ or higher
      A22-1 - Body ground Light control switch ON (HEAD)
      Dimmer switch position LOW      		 Below 1 Ω
      Fig 6: Identifying No. 2 Daytime Running Light Relay Terminals
      G04490754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) 

  10. CHECK WIRE HARNESS (MAIN BODY ECU - DIMMER SWITCH) 
    Fig 7: Identifying E15 Main Body ECU, E12 Dimmer Switch & IJ Instrument Panel Junction Block Connector Terminals
    G04490755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E15 main body ECU connector.
    2. Disconnect the E12 headlight dimmer switch connector.
    3. Disconnect the IJ instrument panel junction block connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      E15-22 (HF) - E12-17 (HF) Below 1 Ω
      E15-22 (HF) or E12-17 (HF) - Body ground 10 kΩ or higher
      IJ-4 (HU) - E12-11 (HU) Below 1 Ω
      IJ-4 (HU) or E12-11 (HU) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go TO NEXT STEP. 

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

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      11 (HU) - 12 (EL) Dimmer switch HIGH Below 1 Ω
      17 (HF) - 12 (EL) Dimmer switch FLASH Below 1 Ω
      Fig 8: Identifying Headlight Dimmer Switch Connector Terminals
      G04490756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY 

    OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY GROUND) 

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