DTC B2276: Acc Relay Off Signal

DTC detecting condition:

When ACC cutoff input ON ("L" level) continues for 40 seconds with ignition switch ON.

Trouble symptom:

The accessory power supply is not cut during engine start.
Starter rotation is slow.

CAUTION:

For replacement procedure of keyless access Control Module and ECM, 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 .

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.

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 HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from the keyless access Control Module.
3. Disconnect the connector from ECM.
4. Using a tester, measure the resistance between the keyless access Control Module connector and ECM.
  Connector & terminal
  
  (i91) No. 19 - (B62) No. 34:
Is the resistance less than 1 Ω?

Yes: Go to 3.

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. 19 - Chassis ground:

Is the resistance 10 kΩ or more?

Yes: Go to 4.

No: Repair or replace the short circuit of the 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 (SHORT CIRCUIT TO POWER SUPPLY) .
1. Turn the ignition switch to ON.
2. Using a tester, measure the voltage between the keyless access Control Module connector and chassis ground.
  Connector & terminal
  
  (i92) No. 17 (+) - Chassis ground (-):
  
  (i91) No. 20 (+) - Chassis ground (-):
Is the voltage 1 V or less?

Yes: Go to 6.

No: Repair or replace the short circuit of the harness.
CHECK KEYLESS ACCESS CONTROL MODULE .
1. Turn the ignition switch to OFF.
2. Connect the disconnected connectors.
3. Place the access key in the passenger room.
4. Using a tester, measure the voltage between the terminals of keyless access Control Module connector.
  Connector & terminal
  
  (i91) No. 19 (+) - (i91) No. 20 (-):
Does the voltage change as 9.5 - 16 V → 1 V or less 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: Replace the keyless access Control Module. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE>REMOVAL .

No: Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM)>REMOVAL .