DTC B2782: Steering Lock Drive Request Signal Correlation

DTC detecting condition: 

When any of the following conditions is established.

• Motor power supply terminal (SLR+ terminal) short circuit malfunction
• Motor power supply terminal (SLR+ terminal) open circuit malfunction

Trouble symptom: 

• The steering lock cannot be released.
• Engine will not start.

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the connector from the steering lock control module.
   2. 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 1 Ω?

   Yes  : Go to  2.

   No  : Repair or replace the open circuit of harness.

2. CHECK STEERING LOCK CONTROL MODULE  .
   1. Connect the steering lock control module connector.
   2. Set to ACC OFF, IGN OFF, and shift position P (AT only).
   3. Using a tester, open the door, and measure the voltage between terminals of steering lock control module connector when the steering lock motor is driven.

      Connector & terminal 

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

   Does the voltage change as follows? When steering lock motor is in operation, 1 V or less → When steering lock motor is not in operation, 9.5 V or more

   Yes  : Go to  3.

   No  : Go to  4.

3. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, perform the clear memory of [Keyless Access with Push Button Start (Collation)]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
   3. Turn the ignition switch to OFF.
   4. Disconnect the ground terminal from the battery sensor and reconnect it, then clear the abnormal information displayed on [Data Monitor]. Ref. to REPAIR CONTENTS>NOTE>BATTERY
   5. Turn the ignition switch to ON.
   6. 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) 

   Is DTC B2782 displayed? (Current code)

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

   No  : Even if DTC is displayed, 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. 

4. CHECK CONNECTOR  .
   1. Disconnect the connector from the steering lock control module.
   2. Disconnect the connector from the keyless access control module.
   3. Check each connector.

   Is the check result OK?

   Yes  : Go to  5.

   No  : Repair or replace the connector.

5. CHECK HARNESS (OPEN CIRCUIT)  .

   Using a tester, measure the resistance between steering lock control module connector and keyless access control module connector.

   Connector & terminal 

   (i91) No. 10 - (i89) No. 3:

   Is the resistance less than 1 Ω?

   Yes  : Go to  6.

   No  : Repair or replace the open circuit of harness.

6. CHECK HARNESS (GROUND SHORT CIRCUIT)  .

   Using a tester, measure the resistance between the keyless access control module connector and chassis ground.

   Connector & terminal 

   (i91) No. 10 - Chassis ground:

   Is the resistance 10 kΩ or more?

   Yes  : Replace the keyless access appropriate service information. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE>REMOVAL

   No  : Repair or replace the short circuit of the harness.