Unlock Position Sensor Signal Circuit

The unlock position sensor is one of the components comprising the steering lock ECU (steering lock actuator assembly). The sensor switch contact closes when the steering lock is released. The steering lock release signal is then sent to the power management control ECU. Upon receiving the signal, the ECU permits engine start. This prevents the engine from being started with the steering wheel locked.

HINT:

After replacing the steering lock ECU (steering lock actuator assembly), confirm the Initialization of the steering lock (See page ).

1. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

(a) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition D17-4 (SLP1) - D17-1 (GND) 1 Turn the engine switch off 2 Turn the engine switch on (ACC or IG) Below 1 V Text in Illustration *1 Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))

OK

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

NG

1. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - POWER MANAGEMENT CONTROL ECU)

(a) Disconnect the D17 connector from the steering lock ECU (steering lock actuator assembly).

(b) Disconnect the D43 connector from the power management control ECU.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

CHECK SMART KEY SYSTEM (for Start Function)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR