Conditions For Setting DTC
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1998 GMC Yukon, 1998 GMC Suburban, 1998 GMC Pickup, 1998 GMC Cab & Chassis, and 1998 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
System will set DTC if front drive shaft input indicates speed of less than 16 RPM for 30 seconds when following conditions are present:
- Transmission in not in Park or Neutral.
- Engine is running.
- Front axle is engaged.
- Rear drive shaft speed exceeds 512 RPM.
- Vehicle speed on Class 2 Data Bus exceeds 10 MPH.
When this DTC is set, all shifts to AUTO mode will be disabled. On both transfer cases, system will not allow any further adaptive events (slip corrections). SERVICE 4WD light will be on for remainder of current ignition cycle.