Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The ignition voltage is between 9 and 18 volts.
The engine speed is more than 80 RPM.
The PCM A/C Compressor Clutch Relay Control transitions between ON to OFF or from OFF to ON.