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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST BY TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Active Test.
    5. Check the operation.

      Main Body (Main Body ECU) 

      CONTROL RANGE CHART

      Tester Display Test Part Control Range Diagnostic Note
      Head Light Hi Headlight dimmer relay (Headlight dimmer switch HI position): ON / OFF 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 

      DAYTIME RUNNING LIGHT RELAY - NO. 2, NO. 4

      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 

      DAYTIME RUNNING LIGHT RELAY - NO. 3

      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: Inspecting Day Time Running Light Relay
      G05585903Courtesy 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: Identifying Headlight Bulb (HIGH) Connector Terminals
      G05585904Courtesy 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 

      STANDARD VOLTAGE

      Tester Connection Specified Condition
      E16-3 (DIM) - Body ground 10 to 14 V
      Fig 3: Identifying E16 Main Body ECU Connector Terminal
      G05585907Courtesy 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 

      STANDARD VOLTAGE

      Tester Connection Specified Condition
      E15-20 (HRLY) - Body ground 10 to 14 V
      Fig 4: Identifying E15 Main Body ECU Connector Terminal
      G05585898Courtesy 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 

      STANDARD VOLTAGE

      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 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      Relay block No. 3 daytime running light relay terminal 2 - Body ground Below 1 Ω
      Fig 5: Identifying No. 3 Daytime Running Light Relay
      G05585914Courtesy 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 

      STANDARD VOLTAGE

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

      Standard resistance 

      STANDARD RESISTANCE

      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
      G05585915Courtesy 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 Main Body ECU And Dimmer Switch Connector Terminals
    G05585916Courtesy 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 

      STANDARD RESISTANCE

      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 

      STANDARD RESISTANCE

      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
      G05585917Courtesy 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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