From 08/2009
STEERING COLUMN: STEERING LOCK SYSTEM: Unable to Unlock Steering Wheel
- Unable to Unlock Steering Wheel
DESCRIPTION
The power management control ECU supplies the power to activate the motor of the steering lock actuator assembly.
The steering lock actuator activates the steering lock motor and moves the lock bar into the steering column to lock the steering wheel.
The steering lock may not release when the lock bar gets stuck in the lock hole of the steering column. In this case, if an engine start operation is performed while shaking the steering wheel in the same manner as is done for a vehicle with a mechanical key, the lock bar will release.
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.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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. CHECK SWITCH CONDITION
(a) Check the power source mode change.
(1) When the key is inside the vehicle and the shift lever is in P, check that pressing the engine switch causes the power source mode to change as follows:
OK:
off -> on (ACC) -> on (IG) -> off
HINT
Do not depress the brake pedal.
NG -- GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION) How To Proceed With Troubleshooting
OK -- Continue to next step.
2. 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 (S CODE)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND)
(a) Disconnect the F37 steering lock ECU connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Resistance:
Standard Voltage:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. 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 -- REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disassembly
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 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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal
OK -- END (ID CODE BOX WAS DEFECTIVE)