Unlock Position Sensor Signal Circuit: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying K28 Connector

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   Standard voltage

   Tester Connection	Condition	Specified Condition
   K28-4 (SLP1) - K28-2 (SGND)	Power switch OFF Turn the power switch ON (ACC or IG)	Below 1 V

OK → CHECK PUSH BUTTON START FUNCTION 

NG: Go to next step 

1. Disconnect the K28 connector from the steering lock actuator.
   Fig 2: Identifying K28 And K73 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the K73 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
   K28-4 (SLP1) - K73-26 (SLP)	Always	Below 1 Ω
   K28-4 (SLP1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE STEERING COLUMN ASSEMBLY