Subaru Crosstrek Service Manual: Dtc b2275 engine start request control circuit

DTC detecting condition:

• When malfunction is detected in engine start permission signal output circuit in the keyless access CM.

• When malfunction is detected in external engine start permission signal circuit.

For replacement procedure of keyless access CM, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1.CHECK LAN SYSTEM.

Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE">

Is LAN system normal?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT">Go to Step 2.

Perform the inspection according to the diagnosis for LAN system.

2.CHECK FUSE.

Check the fuse. Relay and Fuse">

Is the fuse OK?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT">Go to Step 3.

Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited.

3.CHECK HARNESS.

1) Disconnect the keyless access CM connector and ECM connector.

2) Using a tester, measure the resistance between the keyless access CM connector and ECM.

Connector & terminal

(B572) No. 7 — (B137) No. 17:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT">Go to Step 4.

Repair or replace the open circuit of harness.

4.CHECK HARNESS.

Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(B572) No. 11 — Chassis ground:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT">Go to Step 5.

Repair or replace the open circuit of harness.

5.CHECK HARNESS.

Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(B572) No. 7 — Chassis ground:

Is the resistance 10 k? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT">Go to Step 6.

Repair or replace the short circuit of the harness.

6.CHECK KEYLESS ACCESS CM.

1) Connect the keyless access CM connector and ECM connector.

2) Using a tester, measure the voltage between the terminals of keyless access CM connector.

Connector & terminal

(B572) No. 7 (+) — (B572) No. 11 (−):

Is the voltage 2 V or less > 9 V or more when the push button ignition switch is turned on while depressing the brake pedal with the shift position in P or N?

Perform inspection according to the diagnosis of engine. Basic Diagnostic Procedure > PROCEDURE">

Replace the keyless access CM. Keyless Access CM">

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