Malfunction Indicator Light Remains Blinking: Wiring Diagram

Engine electrical system Refer to Engine Electrical System wiring diagram.

Fig 1: Malfunction Indicator Light - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK DELIVERY (TEST) MODE CONNECTOR. Check the delivery (test) mode connector is disconnected. Turn the ignition switch to ON.	Does the malfunction indicator light blink?	Go to step 2 .	System is normal. NOTE: Malfunction indicator light blinks at a cycle of 3 Hz when delivery (test) mode connector is connected.
2 CHECK HARNESS BETWEEN ECM AND CHASSIS GROUND. Turn the ignition switch to OFF. Disconnect the connector from ECM. Measure the resistance between ECM and chassis ground. Connector & terminal (B136) No. 34 - Chassis ground:	Is the resistance 1 MΩ or more?	Replace the ECM. Refer to ENGINE CONTROL MODULE (ECM)	Repair the short circuit to ground in harness between ECM and delivery (test) mode connector.