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 Refer 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 steering lock Control Module connector.
   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.
   3. Using a tester, open the door, and measure the voltage between terminals of steering 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, 11 - 14 V

   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)]. Refer to COMMON (DIAG)>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]. Refer 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. Refer to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B2782 displayed? (Current malfunction)

   Yes:  Replace the steering lock Control Module. Refer to SECURITY AND LOCKS>STEERING LOCK Control Module .

   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 steering lock Control Module connector.
   2. Disconnect the keyless access Control Module connector.
   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 Control Module. Refer to SECURITY AND LOCKS>KEYLESS ACCESS Control Module .

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