Conditions for Setting DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- The PCM performs this DTC diagnostic continuously.
- The vehicle speed is greater than 20 MPH.
- The four wheel low is not selected.
- The VSS buffer calculated speed is less than half the transmission calculated speed.
- All of the Conditions for Setting DTC are met for 2 seconds.
Or
- The PCM performs this DTC diagnostic continuously.
- The VSS buffer calculated speed is greater than transmission calculated speed by 20 MPH.
- All of the diagnostic set conditions met for 2 seconds.