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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.
    3. Select the item below in the ACTIVE TEST and then check that the relay operates.

      MAIN BODY (MAIN BODY ECU): 

      DATA LIST

      Tester Display Test Part Control Range Diagnostic Note
      TAIL LIGHT Taillight relay ON / OFF -

      OK: Taillight relay operates. (Taillights illuminate.) 

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

    NG: Go to next step. 

  2. INSPECT FUSE (TAIL) 
    1. Remove the TAIL fuse from the instrument panel J/B assembly.
    2. Measure the resistance of the fuse.

      Standard resistance: Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go to next step. 

  3. INSPECT TAILLIGHT RELAY 
    1. Remove the taillight relay from the instrument panel J/B assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      Below 1 Ω (When battery voltage is applied to terminals 1 and 2)
      3 - 4 Below 1 Ω
      10 kΩ or higher (When battery voltage is applied to terminals 1 and 2)
      Fig 1: Identifying Taillight Relay Connector Terminals
      G04980113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE TAILLIGHT RELAY 

    OK: Go to next step. 

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Disconnect the DP and DC instrument panel J/B assembly connectors.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      DC-4 - Body ground Light control switch OFF → TAIL Below 1 V → 10 to 14 V
      DC-5 - Body ground Light control switch OFF → TAIL Below 1 V → 10 to 14 V
      DP-8 - Body ground Light control switch OFF → TAIL Below 1 V → 10 to 14 V
    Fig 2: Identifying DC And DP Connectors Terminals
    G05252361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) 

    NG: Go to next step. 

  5. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the DA instrument panel J/B assembly connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      DA-1 - Body ground Always 10 to 14 V
    Fig 3: Identifying DA Connector Terminals
    G05252362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

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