Ignition Relay: Testing and Inspection

IGNITION RELAY DIAGNOSIS

CIRCUIT DESCRIPTION
The ignition relay supplies ignition voltage to the following components:
^ The fuel injectors
^ The ignition coils
^ The Powertrain Control Module (PCM)
^ The alternator/generator

DIAGNOSTIC AIDS
If the IGN relay fails to close:
^ The scan data will be available.
^ The vehicle will crank, no start.
^ The dash indicator lights WILL illuminate.

TEST DESCRIPTION

Steps 1-6:

Steps 7-11:

The numbers below refer to the step numbers on the diagnostic table.
4. This step is testing the relay ground circuit.
5. This step isolates the circuit from the IGN relay. All of the circuits at the relay are good if the test lamp illuminates.