Malfunction Indicator Lamp (MIL) Inoperative

Schematic:

CIRCUIT DESCRIPTION
When the ignition is turned ON, the MIL will momentarily flash ON then OFF then remain ON until the engine is running, if no Diagnostic Trouble Codes (DTCs) are stored. Battery voltage is supplied through the ignition switch directly to the Malfunction Indicator Lamp (MIL) telltale. The Powertrain Control Module (PCM) controls the MIL by providing a ground path through the MIL control circuit in order to turn ON the MIL.

DIAGNOSTIC AIDS
An open ignition fuse causes the MIL to be inoperative. Check any circuitry that is suspected of causing an intermittent problem for the following conditions:
^ Improper mating
^ Broken locks
^ Improperly formed or damaged terminals
^ Physical damage to the wiring harness

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
1. The Powertrain OBD System Check prompts you to complete some of the basic checks and to store the Freeze Frame and Failure Records data on the scan tool, it applicable. This creates an electronic copy of the data captured when the malfunction occurred. The scan tool stores this data for later reference.
2. If no malfunctions are present at this point and no DTCs were set, refer to Diagnostic Aids for additional checks and information.
3. If the engine fails to start and the MIL is inoperative, then the malfunction can be isolated to one of the following items:
^ Open ECM B fuse
^ Open ECM 1 fuse
^ Poor ground at the engine block
^ Malfunctioning PCM
10. Program the replacement PCM and perform the Crankshaft Position System Variation Learn Procedure. Refer to the latest Techline information for PCM programming.