Malfunction Indicator Light Does Not Come On
WARNING: This page is about a different car, the 2006 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS:
The malfunction indicator light circuit is open or shorted.
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), malfunction indicator light does not come on.
WIRING DIAGRAM:
MALFUNCTION INDICATOR LIGHT DOES NOT COME ON - DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK OUTPUT SIGNAL OF ECM.
|
Is the voltage less than 1 V? | Go to step 4. | Go to step 2. |
| 2 CHECK POOR CONTACT. Check for poor connection by shaking or pulling ECM connector and harness. |
Does the malfunction indicator light illuminate? | Repair poor contact in ECM connector. | Go to step 3. |
| 3 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. |
4 CHECK HARNESS BETWEEN COMBINATION METER AND ECM CONNECTOR.
|
Is the resistance less than 1 Ω? | Go to step 5. | Repair the harness and connector.
NOTE:
In this case, repair the following item:
|
| 5 CHECK POOR CONTACT. Check poor contact of combination meter connector. |
Is there poor contact in combination meter connector? | Repair the poor contact of combination meter connector. | Go to step 6. |
6 CHECK HARNESS BETWEEN COMBINATION METER AND IGNITION SWITCH CONNECTOR.
|
Is the voltage more than 10 V? | Replace the combination meter circuit board. < Ref. to COMBINATION METER . > | Check the following item and repair if necessary.
NOTE:
|