H8 - Check Resistance of Injector(s) and Harness SFI Engines

- Key "OFF".

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

NOTE: This erases Continuous Memory.

- Install breakout box, leave PCM disconnected.

- Measure resistance between the suspect injector circuit test pin and test pin 37 at the breakout box. Record resistance.

- For No Starts:

- Pick any injector and measure resistance between that INJECTOR circuit's test pin and test pin 37 at the breakout box. Record resistance.

- Refer to Fuel Injector Resistance Specifications/Single Injector Resistance (Sequential Fuel Injection). H - Fuel Injector Resistance Specification Table

- Is each resistance within specification for the appropriate engine?

Yes -- Go to H12. H12 - Check Injector Driver Signal

No -- For NO Start: Service open in VPWR circuit.

For others: Go to H9. H9 - Check Continuity of Fuel Injector Harness