DTC B227B: Push Engine Start Switch Input Performance: 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 DTC .
1. Using the Subaru Select Monitor, perform the clear memory of [Keyless Access with Push Button Start]. Ref. to COMMON(DIAG)>CLEAR MEMORY .
2. Press the push button ignition switch to perform OFF → ACC ON → IGN ON respectively for one minute.
3. Disconnect and reconnect the keyless access Control Module connector.
4. Read the DTC of [Keyless Access with Push Button Start] using the Subaru Select Monitor.
  Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
  
  Is DTC B227B displayed? (Current malfunction)
  
  Yes : Go to 2 .
  
  No : Even if DTC is displayed, the circuit has returned to a normal condition at this time.
  
  Reproduce the failure, and then perform the diagnosis again.
  
  NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK HARNESS (OPEN CIRCUIT) .
1. Disconnect the push button ignition switch connector.
2. Disconnect the keyless access Control Module connector.
3. Using a tester, measure the resistance between the push button ignition switch connector and the keyless access Control Module connector and chassis ground.
  Connector & terminal
  
  (i150) No. 2 - (i75) No. 9:
  
  (i150) No. 7 - (i75) No. 8:
  
  (i150) No. 5 - Chassis ground
  
  Is the resistance less than 1 Ω?
  
  Yes : Go to 3 .
  
  No : Repair or replace the open circuit of harness.
CHECK PUSH BUTTON IGNITION SWITCH UNIT .
Perform individual inspection of the push button ignition switch. Ref. to SECURITY AND LOCKS>PUSH BUTTON IGNITION SWITCH .

Is the check result OK?

Yes : Go to 4 .

No : Replace the push button ignition switch. Ref. to SECURITY AND LOCKS>PUSH BUTTON IGNITION SWITCH .
CHECK DATA MONITOR .
Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DATA MONITOR .
- Push start SW 1
- Push start SW 2
Is it turned ON when pressing the push button ignition switch?

Yes : Even if DTC is displayed, the circuit has returned to a normal condition at this time.

Reproduce the failure, and then perform the diagnosis again.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

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