Ignition Relay: Testing and Inspection

CIRCUIT DESCRIPTION
The ignition relay supplies voltage to the following components:
^ Oxygen sensors
^ Powertrain control module (PCM)
^ Ignition control (IC) module
^ A/C CLU relay

DIAGNOSTIC AIDS
If the IGN relay fails to close:
^ Scan data will be available.
^ Vehicle will crank, no start.
^ Dash indicator lights will illuminate.

TEST DESCRIPTION

Steps 1-5:

Steps 6-11:

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.