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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.

HINT:

Check if the power source control ECU operation is normal before performing the following procedure.

  1. READ VALUE OF TECHSTREAM (POWER SWITCH) 
    1. Check the DATA LIST for proper functioning of the power switch.

      Main body ECU 

      MAIN BODY ECU DATA LIST

      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      ACC SW ACC switch signal / ON or OFF ON: Power switch ON (ACC)
      OFF: Power switch OFF      		 -
      IG SW IG switch signal / ON or OFF ON: Power switch ON (IG)
      OFF: Power switch OFF      		 -

    OK : PROCEED TO NEXT INSPECTION PROCEDURE 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
    G04475831Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connectors.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      1A-30 (ECUB) - Body ground 10 to 14 V
      1B-1 (SIG) - Body ground

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK : GO TO NEXT STEP 

  3. CHECK DRIVER SIDE JUNCTION BLOCK (MAIN BODY ECU) 
    Fig 2: Identifying Driver Side Junction Block (Main Body ECU) Connector Terminals
    G04475832Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connector.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1J-5 (ACC) - Body ground Power switch ON (ACC) 10 to 14 V

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

    NG : GO TO NEXT STEP 

  4. CHECK DRIVER SIDE JUNCTION BLOCK (MAIN BODY ECU) 
    Fig 3: Identifying Driver Side Junction Block (Main Body ECU) Connector Terminals
    G04475833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connector.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      1K-9 - Body ground 10 to 14 V

    NG : REPLACE DRIVER SIDE JUNCTION BLOCK (MAIN BODY ECU) 

    OK : REPAIR OR REPLACE HARNESS AND CONNECTOR 

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