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

Trouble symptom:

Engine will not start.

CAUTION: For replacement procedure of keyless access Control Module, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

Wiring diagram:

Push button start system Ref. to WIRING DIAGRAM , Push Button Start System.

Fig 1: Engine Start Request Control Circuit - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK LAN SYSTEM. Inspect LAN system. Ref. to Basic Diagnostic Procedure , Basic Diagnostic Procedure.	Is LAN system normal?	Go to step 2 .	Perform the inspection according to the diagnosis for LAN system.
2 CHECK FUSE. Check the fuse. Ref. to Relay and Fuse .	Is the fuse OK?	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. Disconnect the keyless access Control Module connector and ECM connector. Using a tester, measure the resistance between the keyless access Control Module connector and ECM. Connector & terminal (B572) No. 7 - (B137) No. 17:	Is the resistance less than 1 Ω?	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 Control Module connector and chassis ground. Connector & terminal (B572) No. 11 - 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 resistance between the keyless access Control Module connector and chassis ground. Connector & terminal (B572) No. 7 - Chassis ground:	Is the resistance 10 kΩ or more?	Go to step 6 .	Repair or replace the short circuit of the harness.
6 CHECK KEYLESS ACCESS CONTROL MODULE. Connect the keyless access Control Module connector and ECM connector. Using a tester, measure the voltage between the terminals of keyless access Control Module 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. Ref. to Basic Diagnostic Procedure , Basic Diagnostic Procedure.	Replace the keyless access Control Module. Ref. to Keyless Access Control Module .