Prizm L4-108 1.8L DOHC VIN 8 MFI (1998)
Circuit Description
There should be a steady MIL when the ignition is ON, prior to starting the engine. Battery ignition voltage is supplied to the MIL. The PCM will turn
the MIL ON by grounding the control circuit at the PCM. A steady MIL with the engine running suggests a short to ground in the MIL control circuit, or
a DTC is stored.
Diagnostic Aids
An intermittent malfunction, may be caused by a poor connection, rubbed through wire insulation, or a wire broken inside the insulation. Inspect harness
connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals and poor terminal-to-wire connections
before component replacement.
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Check for a shorted MIL control circuit between the PCM and the Instrument Panel (I/P) Cluster Assembly.