System Checks

1. If the engine cranks but does not start and the "check engine" warning light does not light with the Ignition Switch (X134) in position II, do Test B. ECM Power & Ground Test
2. If the engine cranks but does not start and the "check engine" warning light does light with Ignition Switch (X134) in position II, do Test C. No Fault Codes
3. If the engine starts but the "check engine" warning light does not light momentarily, check the bulb and BY wire.