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Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING TECHSTREAM (TAILLIGHT) 
    1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the taillight illuminates.

      Main body ECU 

      MAIN BODY ECU ACTIVE TEST

      Item Test Details Diagnostic Note
      Taillight Relay Turn taillight relay ON / OFF -

      OK : Each light comes on. 

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

    NG : GO TO NEXT STEP 

  2. CHECK DRIVER SIDE JUNCTION BLOCK (MAIN BODY ECU) 
    Fig 1: Identifying Driver Side Junction Block (Main Body ECU) Connector Terminals
    G04475816Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connectors.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1A-15 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1A-33 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1D-10 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1D-29 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1E-10 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1M-6 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1M-8 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1M-9 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V
      1N-7 (TRLY) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL 10 to 14 V

    OK : REPAIR OR REPLACE HARNESS AND CONNECTOR (EACH TAILLIGHT CIRCUIT) 

    NG : GO TO NEXT STEP 

  3. CHECK WIRE HARNESS (ECU - BATTERY) 
    1. Disconnect the 1B junction block connector.
      2. Fig 2: Identifying 1B Junction Block Connector Terminals
      G04475817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      1B-1 (TRLY) - Body ground 10 to 14 V

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

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