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. (Except for hybrid model)/READY ON is not possible. (Hybrid model)

Wiring diagram: 

• Except for hybrid model

  Keyless access with push button start system Ref. to WIRING SYSTEM (IMPREZA MODEL)>KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM>WIRING DIAGRAM .

  Courtesy of SUBARU OF AMERICA, INC.

• Hybrid model

  Keyless access with push button start system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>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 .

1. CHECK LAN SYSTEM  .

   Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (EXCEPT FOR HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE . Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>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. Ref. 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 (except for hybrid model) or the hybrid vehicle control ECU assembly connector (hybrid model).
   2. Using a tester, measure the resistance between the keyless access Control Module connector and ECM (except for hybrid model) or the hybrid vehicle control ECU assembly (hybrid model).

      Connector & terminal 

      Except for hybrid model

      (i75) No. 23 - (B134) No. 25:

      Hybrid model

      (i75) No. 23 - (i369) No. 9:

   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 

   (i241) No. 17 - Chassis ground:

   (i75) 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 (SHORT CIRCUIT TO POWER SUPPLY)  .

   Using a tester, measure the voltage between the keyless access Control Module connector and chassis ground.

   Connector & terminal 

   (i75) No. 23 (+) - Chassis ground (-):

   Is the voltage 1 V or less?

   Yes  : Go to  6.

   No  : Repair or replace the short circuit of the harness.

6. CHECK HARNESS (GROUND SHORT CIRCUIT)  .

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

   Connector & terminal 

   (i75) No. 23 - Chassis ground:

   Is the resistance 10 kΩ or more?

   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. Using a tester, measure the voltage between the terminals of keyless access Control Module connector.

      Connector & terminal 

      (i75) No. 23 (+) - (i75) No. 20 (-):

   Does the voltage change as 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 (CVT model) or while depressing clutch pedal (MT model)?

   Yes  : For models except for hybrid model, perform inspection according to the diagnosis of engine. Ref. to ENGINE (DIAGNOSTICS) (H4DO) (EXCEPT FOR HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

   For hybrid model, perform inspection according to the diagnosis of hybrid powertrain control. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

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