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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. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying Steering Lock Actuator Assembly Connector Terminal E78
      G05250813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E78-3 (IGE) - E78-1 (GND) The specified condition should be checked after performing the following:
      1. Turn the engine switch off
      2. Turn the engine switch on (ACC or IG)
      • Motor activated: Below 1 V
      • Motor not activated: 10 to 12 V
      E78-3 (IGE) - E78-1 (GND) The specified condition should be checked after performing the following:
      1. Move the shift lever to the P position
      2. Turn the engine switch off
      3. Open the driver's door
      • Motor activated: Below 1 V
      • Motor not activated: 10 to 12 V

      HINT:

      The steering lock ECU and steering lock actuator assembly are supplied as a unit.

    OK: REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) 

    NG: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND) 
    1. Disconnect the E78 connector from the steering lock actuator assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E78-1 (GND) - Body ground Always Below 1 Ω
    Fig 2: Identifying Steering Lock Actuator Assembly Connector Terminal E78
    G05250814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU) 
    1. Disconnect the E61 connector from the main body ECU.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E78-3 (IGE) - E61-19 (SLR+) Always Below 1 Ω
      E78-3 (IGE) - Body ground Always 10 kΩ or higher
    Fig 3: Identifying Main Body ECU Connector Terminal E61
    G05250815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

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