EGR Monitor

Perform the following:

• EGR Solenoid is enabled.
• Vehicle speed more than 3 MPH.
• Time from Start/Run is more than 2:09 minutes.
• The Fuel Control is in Closed Loop.
• No Limp-In or OBD-II Monitor faults present.
• Purge is enabled.
• Engine coolant temperature more than 144°F.
• MAP Range during Monitor: 11.70" to 16.20".
• RPM Range during Monitor: 2200 RPM to 2400 RPM.
• Actual TP Sensor above minimum TP Sensor Range: .295 volts to 1.0 volt.
• Maximum Short Term Adapt = +6%.
• The PCM stores the EGR on Short Term Adaptive Memory value.

The PCM begins the monitor. The PCM turns off the EGR Solenoid. The PCM uses a modified ramp rate for Short Term Adaptive Memory. The PCM stores the EGR off Short Term Adaptive Memory value. The PCM determines the Short Term Adaptive Memory shift. Between 3% to 17% Short Term shift adaptive memory, an EGR Monitor passes. Less than 3% rich or more than 17% shift rich will run the test again. 3 failed tests will equal a 1 trip EGR Monitor Failure.