Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

1. 2
   
   The misfire current counters may not increment if certain DTCs are set. Use a scan tool in order to clear the DTCs. Monitoring the misfire current counters isolates which fuel injector is not operating. A misfiring cylinder may cause more than one misfire counter to increment. Diagnose the fuel injector circuit of the cylinder that displays the highest level of misfire.
2. 4
   
   This step tests for voltage at the fuel injector harness connector. The INJR fuse supplies power to the coil side of the fuel injector harness connector. If the fuse is open, a short to ground on the fuel injector ignition voltage circuit is indicated.
3. 5
   
   This step verifies that the PCM is able to control the fuel injector. If the test lamp blinks, then the PCM and wiring are okay.
4. 6
   
   This step tests if a ground is constantly being applied to the fuel injector.