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Home >> Lexus >> 2010 >> IS F >> Repair and Diagnosis (Single Page) >> Steering >> Steering Column >> Steering Lock (Diagnostic Codes & Circuit Tests) >> Steering Lock System >> Unlock Position Sensor Signal Circuit >> Procedure

Unlock Position Sensor Signal Circuit: Procedure

  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 Connector Terminals
      GTY128874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      J29-4 (SLP1) - J29-2 (SGND)
      1. Turn the engine switch off
      2. Turn the engine switch on (ACC or IG)
      		 Below 1 V

    NG → See step   2 

    OK → See step   3 

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU) 
    1. Disconnect the J29 connector from the steering lock actuator assembly.
      Fig 2: Identifying Steering Lock Actuator And Power Source Control ECU Connector Terminals
      GTY149288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the J55 connector from the power source control ECU.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J29-4 (SLP1) - J55-26 (SLP) Always Below 1 Ω
      J29-4 (SLP1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  3. REPLACE STEERING LOCK ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY 
  4. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for start). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
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