Chart A-1 - No Check Engine Light: Notes

There should always be a steady CHECK ENGINE light when ignition is on and engine stopped. Electronic Control Module (ECM) will also turn on light if ECM senses a malfunction or ECM fails.

1. Battery voltage at circuit No. 5 is protected by a 10-amp in-line fuse.
2. Using a test light connected to 12 volts, probe each system ground circuit to ensure a good ground is present.