Diesel Data: Automotive Repair

Malfunction Indicator Lamp (MIL) ON Steady












NOTE:
- When there is no Diagnostic Trouble Code (DTC) stored. the MIL will stay on if the SCS service connector is connected and the ignition switch is on.
- If this symptom is intermittent, check for:
- A loose ECU (ECM) (15 A) fuse in the under-hood fuse/relay box
- A loose No. 2 FUEL PUMP fuse (15 A) in the under-dash fuse/relay box
- An intermittent short in the wire between the ECM/PCM (C7) and the service check connector
- An intermittent open in the wire between the ECM/PCM (D11) and the service check connector
- An intermittent short in the wire between the ECM/PCM (A18) and the gauge assembly
- An intermittent short in the wire between the ECM/PCM (D4) and the MAP sensor
- An intermittent short in the wire between the ECM/PCM (D1O) and the TP sensor, EGR valve lift sensor, Fuel tank pressure sensor (Sedan KA (EX), KL (DX, LX with ABS, EX), KC (EXR), Coupe models)
- See the OBD-II scan tool or Honda PGM Tester user's manuals for specific operating instructions