1A
Malfunction Indicator Lamp Does Not Come ON with Ignition Switch ON (But Engine Stops)
Wiring Diagram
1. Relay box 5. “IG” fuse 9. “IGN1” fuse
2. Ignition switch 6. “MTR” fuse 10. “FI” fuse
3. Main relay 7. ECM    
4. Malfunction indicator lamp in combination meter 8. Circuit fuse box      
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
MIL power supply check
1) Turn ignition switch to ON position.
Do other warning lights come ON?
Go to Step 4.
Go to Step 2.
2
MTR fuse check
1) Turn ignition switch to OFF position.
2) Check for fuse blown at “MTR” fuse.
Is “MTR” fuse in good condition?
Go to Step 3.
Replace “MTR” fuse and check for short.
3
MIL power supply check
1) Disconnect ignition switch connector.
2) Remove “MTR” fuse.
3) Measure resistance between “BLK/RED” wire terminal of ignition switch connector and “BLK/RED” wire terminal of “MTR” fuse connector.
Is resistance 1 Ω or less?
Go to Step 4.
“BLK/RED” wire in open circuit or poor connection.
4
MIL power supply check
1) Connect ignition switch connector.
2) Install “MTR” fuse.
3) Remove combination meter referring to Combination Meter Removal and Installation .
4) Check for proper connection to combination meter connect at “BLK/RED” wire and “PPL/YEL” wire terminals.
5) If OK, then turn ignition switch to ON position and measure voltage between combination meter connector at “BLK/RED” wire terminal and vehicle body ground.
Is it 10 – 14 V?
Go to Step 5.
“BLK/RED” wire in open circuit.
5
MIL circuit check
1) Turn ignition switch to OFF position.
2) Disconnect ECM connector “E118”.
3) Check for proper connection to ECM connector at “E118-1” terminal.
4) Measure resistance between “PPL/YEL” wire terminal of combination meter connector and “E118-1” terminal of ECM connector.
Is resistance 1 Ω or less?
Go to Step 6.
“PPL/YEL” wire in open circuit.
6
MIL circuit check
1) Connect combination meter connectors.
2) Turn ignition switch to ON position.
3) Using service wire, ground “E118-1” terminal wire of disconnected ECM connector.
Does MIL turn OK?
Substitute a known-good ECM and recheck.
Replace combination meter.