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 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 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.
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 and terminal
  
  (i75) No. 23 - (B134) No. 25:
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 and 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.
CHECK HARNESS (GROUND SHORT CIRCUIT) .
Using a tester, measure the resistance between the keyless access control module connector and chassis ground.

Connector and terminal

(i75) 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 and terminal

(i75) 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 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 and terminal
  
  (i75) No. 23 (+) - (i75) 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. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

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