DTC B2786 Steering Lock Control Module Communication: Wiring Diagram

NOTE: For the coupling connector, refer to "WIRING SYSTEM".
Keyless access with push button start system < Ref. to appropriate wiring diagram in SYSTEM WIRING DIAGRAM article. >

Fig 1: Steering Lock Control Module Communication - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTICS PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Read DTC using the Subaru Select Monitor. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Are DTCs other than DTC B2786 displayed?	Perform the diagnosis according to DTC.	Go to step 2 .
2 CHECK HARNESS (OPEN CIRCUIT). Disconnect the keyless access control module connector. Disconnect the steering lock control module connector. Using the tester, measure the resistance between terminals. Connector & terminal (i241) No. 13 - (i47) No. 5:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair or replace the open circuit of harness.
3 CHECK HARNESS (GROUND SHORT CIRCUIT). Using the tester, measure the resistance between terminals. Connector & terminal (i241) No. 13 - Chassis ground:	Is the resistance 10 kΩ or more?	Go to step 4 .	Repair or replace the short circuit of the harness.
4 CHECK HARNESS (OPEN CIRCUIT). Using a tester, measure the resistance between the steering lock control module connector and chassis ground. Connector & terminal (i47) No. 1 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK HARNESS. Turn the ignition switch to ON. Using a tester, measure the voltage between the steering lock control module connector and chassis ground. Connector & terminal (i47) No. 6 (+) - Chassis ground (-): (i47) No. 7 (+) - Chassis ground (-):	Is the voltage 11 - 14 V?	Go to step 6 .	Repair or replace the faulty portion of the power supply circuit.
6 CHECK STEERING LOCK CONTROL MODULE. Turn the ignition switch to ON. Using the Subaru Select Monitor, clear the memory. < Ref. to CLEAR MEMORY MODE . > Read DTC using the Subaru Select Monitor. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is DTC B2785 displayed?	Replace the keyless access control module. < Ref. to KEYLESS ACCESS CONTROL MODULE . >	Go to step 7 .
7 CHECK STEERING LOCK CONTROL MODULE. Turn the ignition switch to ON. Using the Subaru Select Monitor, clear the memory. < Ref. to CLEAR MEMORY MODE . > Read DTC using the Subaru Select Monitor. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is DTC B2786 displayed?	Replace the steering lock control module. < Ref. to STEERING LOCK CONTROL MODULE . >	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.