DTC B2275: Engine Start Request Control Circuit

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 Refer to WIRING SYSTEM>Keyless Access With Push Button Start System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK LAN SYSTEM  .

   Perform the diagnosis for LAN system. Refer 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.

2. CHECK FUSE  .

   Check the fuse. Refer to SECURITY AND LOCKS>RELAY AND FUSE .

   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.

3. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the keyless access Control Module connector and ECM connector.
   2. Using a tester, measure the resistance between the keyless access Control Module connector and ECM.

   Connector & terminal 

   FB engine model 

   (i91) No. 23 - (B62) No. 25:

   FA engine model 

   (i91) No. 23 - (B61) No. 4:

   Is the resistance less than 1 Ω?

   Yes:  Go to  4.

   No  : Repair or replace the open circuit of harness.

4. 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.

5. 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.

6. 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.

7. CHECK KEYLESS ACCESS Control Module  .
   1. Connect the keyless access Control Module connector and ECM connector.
   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?

   Yes:  Perform inspection according to the diagnosis of engine. Refer to ENGINE (DIAGNOSTICS) (H4DO)>Basic Diagnostic Procedure>PROCEDURE . Refer to ENGINE (DIAGNOSTICS) (H4DOTC)>Basic Diagnostic Procedure>PROCEDURE .

   No  : Replace the keyless access Control Module. Refer to SECURITY AND LOCKS>KEYLESS ACCESS Control Module .