Unlock Position Sensor Signal Circuit: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Inspecting Steering Lock Actuator Assembly (Steering Lock ECU)

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   Standard voltage

   Tester connection (Symbols)	Condition	Specified condition
   J29-4 (SLP1) - J29-2 (SGND)	Engine switch off Turn the engine switch on (ACC or IG)	Below 1 V

OK → CHECK PUSH BUTTON START FUNCTION 

NG: Go to next step 

1. Disconnect the J29 connector from the steering lock actuator assembly.
   Fig 2: Identifying J29 And J55 Harness Connectors

   Courtesy 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 (Symbols)	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 → REPLACE STEERING LOCK ACTUATOR ASSEMBLY