DTC B227C: P Range Signal Performance

DTC detecting condition: 

When any of the following conditions is established for CVT model.

• The status continues for 20 seconds where the ignition switch is ON, and the shift position (P terminal) is in shift P ("L" level), and the shift information on CAN is other than P.
• The status continues for 20 seconds where the ignition switch is ON, and the shift position (P terminal) is in other than shift P ("H" level), and the shift information on CAN is P.

Trouble symptom: 

• Engine will not start.
• Power supply control cannot be executed.

Wiring diagram: 

Keyless access with push button start system Ref. to WIRING SYSTEM (CROSSTREK MODEL)>Keyless Access With Push Button Start System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. 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 .

      Clear memory 

   2. Turn the IGN switch to ON.
   3. Place the shift lever in other than P and leave it for one minute.
   4. Disconnect and reconnect the keyless access control module connector.
   5. Read the DTC of [Keyless Access with Push Button Start] using the Subaru Select Monitor. Ref. to COMMON (diag)>DIAGNOSTIC TROUBLE CODE (DTC) .

      DTC Check 

   Is DTC B227C 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.
2. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the P range switch connector.
   2. Disconnect the keyless access control module connector.
   3. Using a tester, measure the resistance between the P range switch connector and the keyless access control module connector.

      Connector & terminal

      (i44) No. 1-(i241) No. 18:

   Is the resistance less than 1 Ω?

   Yes:  Go to  3.

   No:  Repair or replace the open circuit of harness.

3. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the body integrated unit connector.
   2. Using a tester, measure the resistance between body integrated unit connector and keyless access control module connector.

      Connector & terminal

      (B281) No. 17-(i241) No. 30

      (B281) No. 19-(i241) No. 29

   Is the resistance less than 1 Ω?

   Yes:  Go to  4.

   No:  Repair or replace the open circuit of harness.

4. CHECK DATA MONITOR  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start].

   DATA MONITOR 

   • [Shift P signal (AT only)]

   Is it turned ON when the shift position is "P"? Is it turned OFF when the shift position is other than "P"?

   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 .