Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Use the Subaru Select Monitor and read DTCs.	Is B2789 displayed?	Go to step 2 .	Check the connector.
2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the steering lock CM connector. Disconnect the ID code box connector. Using the tester, measure the resistance between terminals. Connector & terminal (i242) No. 17 - (B422) No. 2:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair or replace the open circuit of harness.
3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground, and between ID code box connector and chassis ground. Connector & terminal (i242) No. 17 - Chassis ground: (B422) No. 2 - 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. Using a tester, measure the resistance between ID code box connector and chassis ground. Connector & terminal (B422) No. 5 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK HARNESS. Using a tester, measure the voltage between ID code box connector and chassis ground. Connector & terminal (B422) No. 1 (+) - Chassis ground (-):	Is the voltage 11 - 14 V?	Go to step 6 .	Repair or replace the open circuit of harness.
6 CHECK ID CODE BOX. Replace the ID code box. < Refer to ID CODE BOX . > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs.	Is B2789 displayed?	Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . >	ID code box has an error.