DTC B2785: Lin Communication Error: Wiring Diagram

WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Push button start system < Ref. to WIRING DIAGRAM , Push Button Start System. >

Fig 1: Keyless Access control module - Wiring Diagram (DTC B2785)

Courtesy of SUBARU OF AMERICA, INC.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Use the Subaru Select Monitor and read DTCs.	Is B2785 displayed?	Go to step 2 .	Check the connector.
2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the steering lock CM connector. Using the tester, measure the resistance between terminals. Connector & terminal (B574) No. 17 - (B424) No. 5:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair or replace the open circuit of harness.
3 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (B424) No. 5 - Chassis ground: (B574) No. 17 - 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. Connect the keyless access CM connector only. Use the Subaru Select Monitor and read DTCs.	Is B2785 displayed?	Replace the keyless access CM. < Ref. to REMOVAL , Keyless Access CM. >	Go to step 5 .
5 CHECK STEERING LOCK CM. Replace the steering lock CM, and then connect it. < Ref. to REMOVAL , Steering Lock CM. > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs.	Is B2785 displayed?	Replace the keyless access CM. < Ref. to REMOVAL , Keyless Access CM. >	Malfunction occurred in the steering lock CM.