Conditions for Clearing the DTC

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.

The VIU does not detect a open on the battery positive voltage circuit.
The VIU does not detect a short to ground on the serial data return circuit.
The VIU does not detect a short to B+ on serial data (-) circuit.
A history DTC clears after 50 malfunction free ignition cycles.
The VIU receives the clear DTC command from the scan tool.