Component Inspection

Ignition "OFF".
Engine "ON".
Does warning lamp remain On?
YES
- Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.