EGR Valve Position Sensor: Testing and Inspection

INSPECTION

1. Turn ignition switch off. Install test harness between Programmed Fuel Injection Electronic Control Module (PGM-FI ECM) and harness connector. Turn ignition switch on.

PGM-FI ECM Connector Description And Wire Location:

2. Measure voltage between terminal D12 (+) and terminal D22 (-).
^ With no vacuum applied to the Exhaust Gas Recirculation (EGR) Valve, voltage should read approx. 1.2 volts.
^ With 8 in. hg. of vacuum applied to the EGR Valve, voltage should read approx. 4.3 volts.
3. If voltage is not read or voltage reading does not change when vacuum is applied to the EGR Valve, replace the EGR Valve and Lift Sensor assembly.