DTC P2530: Ignition Switch Run Position Circuit: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to OPERATION , Clear Memory Mode.>, and Inspection Mode Ref. to PROCEDURE , Inspection Mode.>.
Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

Engine Electrical System Ref. to WIRING DIAGRAM , Engine Electrical System.>

Fig 1: Ignition Switch Run Position - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK ECM CONNECTOR. Check the connecting condition of ECM connector.	Is the ECM connector correctly connected?	Go to step 2 .	Connect the ECM connector correctly.
2 CHECK INPUT VOLTAGE OF ECM. Turn the ignition switch to ON. Connect the check board. ST 18460AA050 CHECK BOARD Measure the voltage between ECM connector and engine ground while wiggling the harness between ECM connector and F/B connector. Connector & terminal (B134) No. 27 (+) - Engine ground (-):	Is the voltage 8 V or more all the time?	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, the following items may be the cause of fault. Open circuit or short circuit to ground in harness between ECM connector and F/B connector Poor contact of fuse (F/B No. 5) Poor contact of IG2 relay connector Poor contact of IG2 relay	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit or short circuit to ground in harness between ECM connector and F/B connector Poor contact of fuse (F/B No. 5) Poor contact of IG2 relay connector Poor contact of IG2 relay