STEERING LOCK SYSTEM Steering Lock Motor Drive Power Circuit

DESCRIPTION

The steering lock ECU is connected to the power source control ECU and ID CODE BOX. The steering lock ECU cannot activate the motor unless it receives permission signals from both ECUs. (The power source control ECU permits the steering lock ECU to supply power to activate the motor.)

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK VEHICLE CONDITION

   
   

   1. Check the problem symptom of the steering lock system.

      Result
      Condition Proceed to Steering lock cannot be released. A Steering cannot be locked. B

   
   

   B

   INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Click here

   A

2. READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the intelligent tester on.

   4. Check the steering lock command reception record. Enter the following menus: Body / Entry & Start / Data List.

      Entry & Start

      Tester Display	Measurement Item/Range	Normal Condition
      Lock/Unlock Receive	Steering lock command reception record/YES or NO	YES: Steering lock/unlock signal received NO: Steering lock/unlock signal not received

   5. Check if steering unlock command reception is confirmed.

      OK
      "YES" is displayed on the intelligent tester.

   
   

   NG

   CHECK ENTRY AND START SYSTEM (for Start Function) Click here

   OK

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

   
   

   1. 

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

      Standard Voltage
      Tester Connection Condition Specified Condition J29-3 (IGE) - J29-1 (GND) Turn the engine switch off Turn the engine switch on (ACC or IG) Motor activated: Below 1 V Motor not activated: 10 to 12 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND) Click here

   OK

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

4. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)

   
   

   1. 

      Disconnect the J29 connector from the steering lock actuator assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition J29-1 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)

   
   

   1. 

      Disconnect the J55 connector from the power source control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition J29-3 (IGE) - J55-32 (SLR+) Always Below 1 Ω J29-3 (IGE) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE POWER SOURCE CONTROL ECU

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

   
   

   1. 

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

      Standard Voltage
      Tester Connection Condition Specified Condition J29-3 (IGE) - J29-1 (GND) Specified condition is checked after performing the following: Move the shift lever to P Turn the engine switch off Open the driver's door Motor activated: Below 1 V Motor not activated: 10 to 12 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU) Click here

   OK

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

7. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)

   
   

   1. 

      Disconnect the J29 connector from the steering lock actuator assembly.

   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 J29-3 (IGE) - J55-32 (SLR+) Always Below 1 Ω J29-3 (IGE) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE POWER SOURCE CONTROL ECU