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The Steering Lock Cannot Be Released. (C0 Model)

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

Trouble causes: 

Wiring diagram: 

Keyless access with push button start system Ref. to WIRING SYSTEM>KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM>WIRING DIAGRAM

G14615314Courtesy of SUBARU OF AMERICA, INC.
CAUTION:
  1. CHECK OPERATION  .
    1. Depress the brake pedal (AT) or clutch pedal (MT).
    2. While turning the steering wheel lightly to the left and right, press the push button ignition switch.
    3. Confirm that the steering lock is released and the engine starts.

    Does the engine fail to start with the steering lock released?

    Yes  : Perform the diagnosis for engine system. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTICS WITH PHENOMENON

    No  : Go to  2.

  2. CHECK DTC  .
    1. Turn the ignition switch to ON.
    2. Read the DTC of [Keyless Access with Push Button Start (Collation)] using the Subaru Select Monitor. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

    Are any DTCs displayed? (Current code)

    Yes  : Perform the diagnosis for the displayed DTCs.

    No  : Go to  3.

  3. CHECK DATA MONITOR  .
    1. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start (Collation)]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DATA MONITOR 
      • Steering lock unlock request reception status

        and

      • Steering lock lock/unlock command reception history
    2. Read the data when the push button ignition switch is pressed while carrying the access key. (Maintain for 10 seconds after switch operation)

    Does the data display [Not yet received] → [Reception (keep 10 sec)] and [OFF] → [ON (keep 10 sec)]?

    Yes  : Go to  4.

    No  : Go to  7.

  4. CHECK HARNESS (OPEN CIRCUIT)  .
    1. Turn the ignition switch to OFF.
    2. Disconnect the steering lock control module connector.
    3. Using a tester, measure the voltage between the steering lock control module connector and chassis ground.

      Connector & terminal 

      (i89) No. 7 (+) - Chassis ground (-):

    Is the voltage 9.5 V or more?

    Yes  : Go to  5.

    No  : Repair or replace the open circuit of harness.

  5. CHECK HARNESS (OPEN CIRCUIT)  .

    Using a tester, measure the resistance between the steering lock control module connector and chassis ground.

    Connector & terminal 

    (i89) No. 1 - Chassis ground:

    Is the resistance less than 10 Ω?

    Yes  : Go to  6.

    No  : Repair or replace the open circuit of harness.

  6. CHECK STEERING LOCK CONTROL MODULE  .
    1. Connect the disconnected connectors.
    2. Using a tester, measure the voltage between steering lock control module terminals right after the ignition switch is turned to ON.

      Connector & terminal 

      (i89) No. 3 - (i89) No. 1:

    Is the voltage 1 V or less right after the ignition ON?

    Yes  : Replace the steering lock control module. Ref. to SECURITY AND LOCKS>STEERING LOCK CONTROL MODULE>REPLACEMENT

    No  : Repair or replace the open circuit of harness.

  7. CHECK DATA MONITOR  .
    1. Turn the ignition switch to ON.
    2. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start (Collation)]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DATA MONITOR 
      • Code collation result between smart ECM and ID code box

    Is the displayed data [Normal]?

    Yes  : Go to  9.

    No  : Go to  8.

  8. CHECK ID CODE BOX  .
    1. Turn the ignition switch to OFF.
    2. Replace with a properly functioning or new ID code box. Ref. to SECURITY AND LOCKS>ID CODE BOX
    3. Turn the ignition switch to ON.
    4. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start (Collation)]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DATA MONITOR 
      • Code collation result between smart ECM and ID code box

    Is the displayed data [Normal]?

    Yes  : The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

    NOTE:

    In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. 

    No  : Replace the keyless access control module. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE>REMOVAL

  9. CHECK DATA MONITOR  .

    Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start (Collation)]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DATA MONITOR 

    • Code collation result between steering locked ECM and ID code box

    Is the displayed data [Normal]?

    Yes  : The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

    NOTE:

    In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. 

    No  : Go to  10.

  10. CHECK STEERING LOCK CONTROL MODULE  .
    1. Turn the ignition switch to OFF.
    2. Replace with a properly functioning or new steering lock control module. Ref. to SECURITY AND LOCKS>STEERING LOCK CONTROL MODULE
    3. After registering, the steering lock operates when the ignition is turned to OFF and the driver's door is opened and closed.
    4. Turn the ignition to ON.
    5. Operate the steering and check for whether the steering lock is released.

    Is the steering lock released, and does the engine start?

    Yes  : Replace the steering lock control module. Ref. to SECURITY AND LOCKS>STEERING LOCK CONTROL MODULE>REPLACEMENT

    No  : Go to  11.

  11. CHECK ID CODE BOX  .
    1. Turn the ignition switch to OFF.
    2. Replace with a properly functioning or new ID code box. Ref. to SECURITY AND LOCKS>ID CODE BOX>NOTE
    3. Turn the ignition switch to ON.
    4. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start (Collation)]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DATA MONITOR 
      • Code collation result between steering locked ECM and ID code box

    Is the displayed data [Normal]?

    Yes  : The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

    NOTE:

    In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. 

    No  : Replace the keyless access control module. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE>REMOVAL

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