DTC B2785 Lin Communication: Wiring Diagram

Push button start system wiring diagram. Refer to appropriate SYSTEM WIRING DIAGRAMS article.

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. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is B2785 displayed?	Go to step 2.	Check the connector.
2 CHECK HARNESS. Disconnect the keyless access CM (Control Module) connector. Disconnect the steering lock CM (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 CM (Control Module) connector only. Use the Subaru Select Monitor and read DTCs. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is B2785 displayed?	Replace the keyless access CM (Control Module). < Ref. to KEYLESS ACCESS CM (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. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is B2785 displayed?	Replace the ID code box.	Go to step 6.
6 CHECK STEERING LOCK CM (Control Module). Replace the steering lock CM (Control Module), and then connect it. < Ref. to STEERING LOCK CM (Control Module) . > Using the Subaru Select Monitor, clear the memory. < Ref. to CLEAR MEMORY MODE . > Use the Subaru Select Monitor and read DTCs. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is B2785 displayed?	Replace the keyless access CM (Control Module). < Ref. to KEYLESS ACCESS CM (Control Module) . >	Malfunction occurred in the steering lock CM (Control Module).