HB7 - Check Continuity of Fuel Injector Harness

- Key "OFF".

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

- Disconnect injector vehicle harness connector at the suspect injector.

- Measure resistance between test pin 37/57 at the breakout box and the VPWR pin at the injector vehicle harness connector.

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

- Measure resistance between the injector test pin(s) at the breakout box and the same injector circuit signal pin at the each injector vehicle harness connector.

- Is each resistance less than 5.0 ohms?

Yes -- Go to HB8. HB8 - Check Injector Harness For Short to Power or Ground

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