Unable to Lock Steering Wheel

STEERING COLUMN: STEERING LOCK SYSTEM: Unable to Lock Steering Wheel
- Unable to Lock Steering Wheel

DESCRIPTION

The steering lock ECU (steering lock actuator assembly) sends an unlock position signal to the power management control ECU. On receiving the signal, the power management control ECU permits an engine start. This prevents the engine from being started with the steering locked.

The steering lock actuator activates the steering lock motor and moves the lock bar into the steering column to lock the steering wheel.

When the steering lock is operating, the steering lock may not lock when the lock bar is not aligned with the lock hole of the steering column. In this case, the steering lock can be locked by turning the steering wheel a little in the same manner as is done for a vehicle with a mechanical key to change the position of the lock hole.

The diagnosis information of the steering lock ECU (steering lock actuator assembly) is transmitted to the Techstream via the certification ECU (smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to the CAN communication system.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start.
* After replacing the steering lock ECU (steering lock actuator assembly), ID code box (immobiliser Code ECU) or certification ECU (smart key ECU assembly), perform the key ID code registration Engine Immobilizer System.

HINT
When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU:

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

PROCEDURE

1. READ VALUE USING TECHSTREAM (LOCK/UNLOCK RECEIVE)

(a) Use the Data List to check if the steering lock command is functioning properly.

Smart Access:





OK:

The certification ECU (smart key ECU assembly) receives an unlock request signal within 10 seconds of starting the engine, and "Yes" is displayed on the Techstream screen.

NG -- READ VALUE USING TECHSTREAM (FL DOOR COURTESY SW)
OK -- Continue to next step.

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

(a) Move the shift lever to P.





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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Disconnect the F8 power management control ECU connector.





(b) Disconnect the F37 steering lock ECU connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disassembly

4. READ VALUE USING TECHSTREAM (FL DOOR COURTESY SW)

(a) Use the Data List to check if the front door courtesy switch LH is functioning properly.

Main Body:





OK:

Front door courtesy switch LH is functioning properly.

NG -- INSPECT LIGHTING SYSTEM Door Courtesy Switch Circuit
OK -- Continue to next step.

5. READ VALUE USING TECHSTREAM (S CODE)

(a) Use the Data List to check if the S code certification is functioning properly.

Smart Access:





OK:

"OK" is displayed on the Techstream.

NG -- REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK -- Continue to next step.

6. READ VALUE USING TECHSTREAM (L CODE)

(a) Use the Data List to check if the L code certification is functioning properly.

Smart Access:





OK:

"OK" is displayed on the Techstream.

NG -- REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK -- Continue to next step.

7. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

(a) Replace the steering lock ECU (steering lock actuator assembly) Disassembly.

NEXT -- Continue to next step.

8. CHECK STEERING LOCK RELEASED BY USUAL IGNITION

(a) Turn the engine switch on (IG).

(b) Operate the steering wheel and check the steering lock condition.

OK:

Steering lock is released.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)

9. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

(a) Replace the ID code box (immobiliser code ECU) Removal.

NEXT -- Continue to next step.

10. READ VALUE USING TECHSTREAM (S CODE)

(a) Use the Data List to check if the S code certification is functioning properly.

Smart Access:





OK:

"OK" is displayed on the Techstream.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- END (ID CODE BOX WAS DEFECTIVE)

11. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

(a) Replace the ID code box (immobiliser code ECU) Removal.

NEXT -- Continue to next step.

12. READ VALUE USING TECHSTREAM (L CODE)

(a) Use the Data List to check if the L code certification is functioning properly.

Smart Access:





OK:

"OK" is displayed on the Techstream.

NG -- REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disassembly

OK -- END (ID CODE BOX WAS DEFECTIVE)