HB8 - Check Injector Harness For Short to Power or Ground

- Key "OFF".

- Breakout box installed, Powertrain Control Module (PCM) disconnected.

- Suspect fuel injector vehicle harness disconnected.

- Refer to the Pinpoint Test Schematic for the appropriate injector pin identification.

- Measure resistance between the injector test pin(s) and test pin 37/57, 40, 46 and 60 at the breakout box.

- Measure resistance between the injector test pin(s) at the breakout box and chassis ground.

- Is each resistance greater than 10,000 ohms?

Yes -- Replace injector per cylinder balance test fault code. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Service short circuit. Remove breakout box. Reconnect PCM and injectors. Drive vehicle 5 miles/55 mph. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)