DTC B2275: Engine Start Request Control Circuit

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

DTC detecting condition:

When any of the following conditions is established with ignition switch ON.

Both starter output ON and output circuit monitor result OFF are successful 3 times in a row.
Starter output OFF, output circuit monitor result ON and remote engine starter not under control all continue for 10 seconds.

Trouble symptom:

Engine will not start.

Wiring diagram:

Keyless access with push button start system Ref. to WIRING SYSTEM>KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM>WIRING DIAGRAM

Courtesy of SUBARU OF AMERICA, INC.

CAUTION:

For replacement procedure of keyless access control module, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION

CHECK LAN SYSTEM .
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE

Is the check result OK?

Yes : Go to 2.

No : Perform the inspection according to the diagnosis for LAN system.
CHECK FUSE .
Check the fuse. Ref. to WIRING SYSTEM>KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM>WIRING DIAGRAM

Is the check result OK?

Yes : Go to 3.

No : Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited.
CHECK HARNESS (OPEN CIRCUIT) .
1. Disconnect the connector from the keyless access control module.
2. Disconnect the connector from ECM.
3. Using a tester, measure the resistance between the keyless access control module connector and ECM.
  Connector & terminal
  
  (i91) No. 23 - (B61) No. 55:
Is the resistance less than 1 Ω?

Yes : Go to 4.

No : Repair or replace the open circuit of harness.
CHECK HARNESS (OPEN CIRCUIT) .
Using a tester, measure the resistance between the keyless access control module connector and chassis ground.

Connector & terminal

(i92) No. 17 - Chassis ground:

(i91) No. 20 - Chassis ground:

Is the resistance less than 1 Ω?

Yes : Go to 5.

No : Repair or replace the open circuit of harness.
CHECK HARNESS (GROUND SHORT CIRCUIT) .
Using a tester, measure the resistance between the keyless access control module connector and chassis ground.

Connector & terminal

(i91) No. 23 - Chassis ground:

Is the resistance 10 kΩ or more?

Yes : Go to 6.

No : Repair or replace the short circuit of the harness.
CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY) .
Using a tester, measure the voltage between the keyless access control module connector and chassis ground.

Connector & terminal

(i91) No. 23 (+) - Chassis ground (-):

Is the voltage 1 V or less?

Yes : Go to 7.

No : Repair or replace the short circuit of the harness.
CHECK KEYLESS ACCESS CONTROL MODULE .
1. Connect the disconnected connectors.
2. Place the access key in the passenger room.
3. Using a tester, measure the voltage between the terminals of keyless access control module connector.
  Connector & terminal
  
  (i91) No. 23 (+) - (i91) No. 20 (-):
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 (AT), or while depressing the clutch pedal (MT)?

Yes : Perform inspection according to the diagnosis of engine. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE

No : Replace the keyless access control module. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE>REMOVAL