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Unlock Position Sensor Signal Circuit: Procedure

  1. INSPECT STEERING LOCK ECU 
    GTY109927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition (Steering Lock Position) Specified Condition
      E26-4 (SLP1) - E26-2 (SGND) Locked 11 to 14 V
      E26-4 (SLP1) - E26-2 (SGND) Unlocked Below 1 V

    NG → See step   2 

    OK → See step   3 

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU) 
    GTY109974Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E26 steering lock ECU connector.
    2. Disconnect the E1 main body ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E26-4 (SLP1) - E1-18 (SLP) Always Below 1 Ω
      E26-4 (SLP1) or E1-18 (SLP) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  3. GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION) (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2012 - ] 
  4. REPLACE STEERING LOCK ACTUATOR (STEERING LOCK ECU). Refer to  DISASSEMBLY [01/2012 - ]