FixVault
Home › Toyota › 2008 › Corolla LE, Standard › Repair and Diagnosis › External Pages › Different car › Section 99 (Lighting System) › Lighting System › Headlight Relay Circuit › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Disconnect the 2C connector from the instrument panel junction block assembly.
      Fig 1: Identifying Instrument Panel Junction Block Assembly Front Side Wire Harness View
      G05131943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a service wire, connect 2C-10 of the wire harness side and body ground.

      OK: Headlight comes on. 

    NG: Go to step 2 

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

  2. INSPECT ENGINE ROOM J/B 
    1. Disconnect the 1H connector from the instrument panel junction block assembly.
      Fig 2: Identifying 1H Connector From Instrument Panel Junction Block Assembly
      G05131944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a service wire, connect 1H-11 of the engine room J/B and body ground.

      OK: Headlight comes on. 

    NG: Go to step 3 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM J/B - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 

  3. INSPECT ENGINE ROOM J/B 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 3: Identifying Engine Room Junction Block Connector Terminals (Front Side)
      G05131945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE CHART

      Tester connection Condition Specified voltage (V)
      1H-11 - Body ground Always 10 to 14 V

    NG: Go to step  6

    OK: Go to next step. 

  4. INSPECT ENGINE ROOM J/B 
    1. Remove the HEAD relay from the engine room J/B.
      Fig 4: Identifying HEAD Relay From Engine Room J/B
      G05131946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a service wire, connect terminals 5 and 3 of the HEAD relay in the engine room J/B.

      OK: Headlight comes on. 

    NG: Go to step 5 

    OK: REPLACE HEADLIGHT RELAY 

  5. INSPECT ENGINE ROOM J/B 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 5: Identifying Engine Room Junction Block Connector Terminals (Front Side)
      G05131947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE CHART

      Tester connection Condition Specified voltage (V)
      1F-3 - Body ground Always 10 to 14 V

    NG: REPLACE ENGINE ROOM J/B 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF HEADLIGHT CIRCUIT) 

  6. INSPECT ENGINE ROOM J/B 
    1. Remove the HEAD relay from the engine room J/B.
      Fig 6: Identifying HEAD Relay From Engine Room J/B
      G05131946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE CHART

      Tester connection Condition Specified voltage (V)
      1 - Body ground Always 10 to 14 V

    NG: Go to step 7 

    OK: REPLACE HEADLIGHT RELAY 

  7. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the 1A connector from the engine room junction block assembly.
      Fig 7: Identifying 1A Connector From Engine Room Junction Block Assembly
      G05131949Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE CHART

      Tester connection Condition Specified voltage (V)
      1A-2 - Body ground Always 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ENGINE ROOM J/B 

About FixVault