KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC B2201 ABNORMAL LIN COMMUNICATION

DTC DETECTING CONDITION:

A communication error is occurring between the power supply CM and collation CM.

TROUBLE SYMPTOM:

• Engine will not start.

• Accessory and ignition will not turn ON.

WIRING DIAGRAM:

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1.CHECK DTC.

1) Disconnect the ID code box connector.

2) Connect the Subaru Select Monitor and read DTCs.

Is B2201 displayed?

Replace the ID code box.

2.CHECK DTC.

1) Connect the ID cord box connector, and disconnect the steering lock CM connector.

2) Connect the Subaru Select Monitor and read DTCs.

Is B2201 displayed?

Replace the steering lock CM.

3.CHECK DTC.

1) Connect the steering lock CM connector, and disconnect the power supply CM connector.

NOTE:

By disconnecting the power supply CM connector for inspection, other DTC codes may become detected.

2) Connect the Subaru Select Monitor and read DTCs.

Is B2201 or B2217 displayed?

Replace the power supply CM.

4.CHECK COLLATION CM.

1) Connect the power supply CM connector.

2) Disconnect the collation CM connector and the ID cord box connector.

3) Using a tester, check continuity between the collation CM connector and ID cord box connector.

Connector & terminal

(B421) No. 10 — (B422) No. 3:

Is there continuity?

Repair or replace the open circuit of harness.

5.CHECK COLLATION CM.

Using a tester, check continuity between the collation CM connector and chassis ground.

Connector & terminal

(B421) No. 10 — Chassis ground:

Is there continuity?

Repair or replace the short circuit of the harness.

6.CHECK COLLATION CM.

1) Disconnect the collation CM connector and the steering lock CM connector.

2) Using a tester, check continuity between the collation CM connector and steering lock CM connector.

Connector & terminal

(B421) No. 10 — (B424) No. 5:

Is there continuity?

Repair or replace the open circuit of harness.

7.CHECK HARNESS.

Using a tester, check continuity between the steering lock CM connector and chassis ground.

Connector & terminal

(B424) No. 5 — Chassis ground:

Is there continuity?

Repair or replace the short circuit of the harness.

8.CHECK COLLATION CM.

1) Connect the steering lock CM connector.

2) Disconnect the collation CM connector and power supply CM connector.

3) Using a tester, check continuity between the collation CM connector and power supply CM connector.

Connector & terminal

(B421) No. 10 — (B420) No. 30:

Is there continuity?

Repair or replace the open circuit of harness.

9.CHECK HARNESS.

Using a tester, check continuity between the power supply CM connector and chassis ground.

Connector & terminal

(B420) No. 30 — Chassis ground:

Is there continuity?

Repair or replace the short circuit of the harness.

Replace the collation CM.