Component Testing

Fuel Injector Diagnosis:

For fuel injector diagnosis, refer to the Fuel Injector Diagnosis chart.

NOTE: For poor fuel economy diagnosis or engine miss, also consider Transmission Control System problems.

Helpful Information
- Circuit A142 splices to supply voltage to the fuel injectors, ignition coil, ASD relay, and the generator. The PCM controls the ground circuit for each of the components powered by circuit A142.