KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT)

KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT)

DTC DETECTING CONDITION:

Communication error between ID code box and ECM

TROUBLE SYMPTOM:

Engine will not start.

WIRING DIAGRAM:

• Gasoline engine model

• Diesel engine model

STEP	CHECK	YES	NO
1.CHECK CURRENT DATA. 1) Check the collation CM data using the Subaru Select Monitor. 2) Display the next data. “Immobilizer” “Engine start” “Unlock confirmation” Data Immobilizer = Unset: Engine start = Engine start permission: Unlock confirmation = Confirmed:	Is the data displayed as described above?		Perform the diagnosis for the keyless access system.
2.CHECK CURRENT DATA. Use the Subaru Select Monitor to check the collation CM data when holding down the push button ignition switch while depressing on the brake pedal. Data EGI code reception status = Reception: NOTE: If the status changes to “Not yet received” in 10 seconds after displaying “Reception”, or when performing the check again, perform the check after turning the ignition to OFF.	Is the data displayed as described above?		Repair or replace the harness (B422) No. 5 line between ID code box and ECM.
3.CHECK WIRING HARNESS. 1) Disconnect the ID code box connector and the ECM connector. 2) Using a tester, measure the resistance between ID code box connector and ECM. Connector & terminal Non-turbo model (B422) No. 6 — (B135) No. 11: Turbo model (B422) No. 6 — (B134) No. 16: Diesel engine model (B422) No. 6 — (B135) No. 5:	Is the resistance less than 10 Ω?	Replace the ID code box.	Repair or replace the harness (B422) No. 6 line between ID code box and ECM.