Test Notes

You should enter this Pinpoint Test only when directed here.

This Pinpoint Test is intended to diagnose the following:
- Heated Oxygen Sensor (HO2S)/Heater
- HO2S Connections
- Vacuum Systems
- Fuel Injector(s)
- Harness Circuits: HO2S GND, HO2S, INJ 1-8 VPWR and SIG RTN
- Powertrain Control Module (PCM)
- Natural Gas (NG) Module


DESCRIPTION
For additional information on the Heated Oxygen Sensor (HO2S) refer to Description and Operation / EEC-V Software and Hardware / EEC-V Hardware / PCM Related Inputs.

For additional information on the Heated Oxygen Sensor (HO2S) Monitor, refer to Description and Operation / On Board Diagnostics II System Monitors.