Malfunction Indicator Light Does Not Come On: Wiring Diagram

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

Fig 1: Malfunction Indicator Light - Wiring Diagram

G06647746

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK OUTPUT SIGNAL OF ECM . Turn the ignition switch to ON. Measure the voltage between ECM and chassis ground. Connector & terminal (B135) No. 33 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 5 .	Go to step 2 .
2 CHECK HARNESS BETWEEN ECM AND COMBINATION METER CONNECTOR . Turn the ignition switch to OFF. Remove the combination meter. Ref. to COMBINATION METER . Disconnect the connectors from ECM and combination meter. Measure the resistance of harness between ECM and combination meter connector. Connector & terminal (B135) No. 33 - (i10) No. 6:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between ECM and combination meter connector Poor contact of coupling connector
3 CHECK FOR POOR CONTACT . Check for poor contact of combination meter connector.	Is there poor contact of combination meter connector?	Repair the poor contact of combination meter connector.	Go to step 4 .
4 CHECK HARNESS BETWEEN COMBINATION METER AND IGNITION SWITCH CONNECTOR . Turn the ignition switch to ON. Measure the voltage between combination meter connector and chassis ground. Connector & terminal (i10) No. 19(+) - Chassis ground (-):	Is the voltage 10 V or more?	Replace the meter case assembly of combination meter. Ref. to COMBINATION METER .	Check the following item and repair if necessary. NOTE: Blown-out of fuse (F/B No. 5) Open circuit or short circuit to ground in harness of power supply circuit
5 CHECK FOR POOR CONTACT . Check for poor connection by shaking or pulling ECM connector and harness.	Does the malfunction indicator light illuminate?	Repair the poor contact of ECM connector.	Go to step 6 .
6 CHECK ECM CONNECTOR . Check the connection of ECM connector.	Is the ECM connector correctly connected?	Replace the ECM. Ref. to ENGINE CONTROL MODULE (ECM) .	Repair the connection of ECM connector.