DTC B2785 Lin Communication Error: Wiring Diagram

Push button start system <Ref. to STARTING/CHARGING , Push Button Start System.>

Fig 1: Push Button Start System - Wiring Diagram

G10271470

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC 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 control module connector. Disconnect the steering lock control module connector. Disconnect the ID code box connector. (with ID code box) Using the tester, measure the resistance between terminals. Connector & terminal (B574) No. 17 - (B424) No. 5: (B574) No. 17 - (B422) No. 2: (With ID code box)	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: (B422) No. 5 - Chassis ground: (with ID code box)	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 control module connector only. Use the Subaru Select Monitor and read DTCs.	Is B2785 displayed?	Replace the keyless access control module. <Ref. to KEYLESS ACCESS CONTROL MODULE .>	Go to step 5 .
5 CHECK ID CODE BOX . NOTE: For model without ID code box, go to the next step. Connect only the ID code box. Use the Subaru Select Monitor and read DTCs.	Is B2785 displayed?	Replace the ID code box.	Go to step 6 .
6 CHECK STEERING LOCK CONTROL MODULE . Replace the steering lock control module, and then connect it. <Ref. to STEERING LOCK CONTROL MODULE .> Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs.	Is B2785 displayed?	Replace the keyless access control module. <Ref. to KEYLESS ACCESS CONTROL MODULE .>	Malfunction occurred in the steering lock control module.