MIL Circuit Troubleshooting

NOTE: If this symptom is intermittent, check for a loose No.1 BACK UP LIGHTS (10A) fuse in the under-dash fuse/relay box, a poor connection at ECM terminal A7, or an intermittent open in the BLU wire between the ECM (A7) and the gauge assembly.













NOTE: When there is no stored, the MIL will stay on if the Service Check Connector is shorted and the Ignition Switch is "ON".

If this symptom is intermittent, check for:
- A loose ECU (ECM) (10 A) fuse in the Under-Hood Fuse/Relay Box.
- A loose No. 2 FUEL PUMP (15 A) fuse in the Under-Dash Fuse/Relay Box.
- An intermittent short in the RED wire between the ECM (D 13) and the Service Check Connector.
- An intermittent open in the GRN/BLU wire between the Service Check Connector and ECM (D 22).
- An intermittent short in the BLU wire between the ECM (A 7) and the Gauge Assembly.
- An intermittent short in the YEL/WHT wire between the ECM (A 10) and the MAP Sensor.
- An intermittent short in the YEL/BLU wire between the ECM (D 21) and the TP Sensor.

After repair, disconnect the SCS Service Connector, test drive the car, and recheck the MIL for a code.