1A
Malfunction Indicator Lamp Remains ON after Engine Starts
Wiring Diagram
1. Relay box 5. Malfunction indicator lamp in combination meter 9. “IGN1” fuse
2. Ignition switch 6. “FI” fuse 10. ECM
3. Fuse box 7. “IG” fuse 11. Monitor connector
4. Main relay 8. “MTR” fuse      
Circuit Description
When the ignition switch is turned ON, ECM causes the main relay to turn ON (close the contact point). Then, ECM being supplied with the main power, turns ON the malfunction indicator lamp (MIL). When the engine starts to run and no malfunction is detected in the system, MIL goes OFF but if a malfunction was or is detected, MIL remains ON even when the engine is running.
Troubleshooting
Step Action YES NO
1
DTC check
1) Check DTC referring to DTC Check:M13A without VVT .
Is there any DTC(s)?
Go to Step 2 of Engine and Emission Control System Check:M13A without VVT .
Go to Step 2.
2
DTC check
1) Start engine and recheck DTC while engine running.
Is there any DTC(s)?
Go to Step 2 of Engine and Emission Control System Check:M13A without VVT .
Go to Step 3.
3
MIL circuit check
1) Turn OFF ignition switch.
2) Disconnect connectors from ECM.
Does MIL turn ON at ignition switch ON?
“PPL/YEL” wire circuit shorted to ground.
Substitute a known-good ECM and recheck.