Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- A dead zone exists in a range 10 counts above the mix door maximum position to 10 counts below the mix door minimum position. When the air mix door actual data parameter is within the dead zone, the DTC will not set. If the Commanded data parameter differs from the actual data parameter by 4 or more counts outside the dead zone, the DTC will set.
- A damaged air temperature door, a damaged actuator, a broken air temperature door, or a broken actuator can cause this DTC to set.
- If the condition is not present, refer to TESTING FOR INTERMITTENT & POOR CONNECTIONS .