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Power Source Circuit: Procedure

  1. INSPECT FUSE (STR LOCK) 
    1. Remove the STR LOCK fuse from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      Tester Connection Condition Specified Condition
      STR LOCK fuse Always Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY) 
    Fig 1: Identifying E77 Steering Lock ECU Connector Terminals
    GTY235637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E77 ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      Tester Connection Condition Specified Condition
      E77-7 (B) - Body ground Always 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND) 
    Fig 2: Identifying E77 ECU Connector Terminals (GND) (SGND)
    GTY226729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E77 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      Tester Connection Condition Specified Condition
      E77-1 (GND) - Body ground Always Below 1 Ω
      E77-2 (SGND) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  4. GO TO STEERING LOCK SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to  PROBLEM SYMPTOMS TABLE 
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