1A
Malfunction Indicator Lamp Does Not Flash, Just Remains ON or Just Remains OFF Even with Grounding Diagnosis Switch
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
Diagnosis switch terminal circuit check
1) With grounding diagnosis switch terminal and turn the ignition switch ON position, check voltage between “E114-13” terminal of ECM connector and ground.
Is voltage 0 – 1 V?
Go to Step 2.
“WHT/BLU” wire (diagnosis switch terminal), “BLK” wire of monitor connector open.
If OK, substitute a known-good ECM and recheck.
2
Test switch terminal circuit check
1) With the ignition switch ON position, check voltage between “E114-15” terminal of ECM connector and ground.
Is voltage 4 – 5 V?
Substitute a known-good ECM and recheck.
“PNK” wire (test switch terminal) shorted to ground circuit.
If OK, substitute a known-good ECM and recheck.