DTC P081A: Starter Disable Circuit Low: Notes

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Failure of engine to start

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: Starting System Circuit Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN F/B STARTER RELAY (PUSH BUTTON START) CONNECTOR AND STARTER CUT RELAY CONNECTOR. Turn the ignition to OFF. Remove the F/B starter relay. Remove the starter cut relay. Measure the resistance of harness between F/B starter relay connector and starter cut relay connector. Connector & terminal (B220) No. 18 - (i137) No. 8:	Is the resistance less than 1 Ω?	Go to step 2	Repair the open circuit of harness. Open circuit of harness between F/B starter relay connector and starter cut relay connector Blown out of fuse (F/B No. 1)
2 CHECK HARNESS BETWEEN ECM AND STARTER CUT RELAY CONNECTOR. Disconnect the connector from ECM. Measure the resistance of harness between ECM connector and starter cut relay connector. Connector & terminal (B134) No. 62 - (B158) No. 2:	Is the resistance less than 1 Ω?	Go to step 3	Repair the open circuit of harness between ECM connector and starter cut relay connector.
3 CHECK STARTER CUT RELAY. Connect the battery to starter cut relay terminals No. 17 and No. 19. Measure the resistance between starter cut relay terminals. Terminals No. 18 - No. 21:	Is the resistance 1 MΩ or more?	Repair the poor contact of ECM connector.	Replace the starter cut relay. Ref. to RELAY AND FUSE