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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 934 (HVAC Systems - Manual) >> Diagnostic Information and Procedures >> DTC P0645, P0646 Or P0647: Open Or Short To Ground On Control Circuit Of The A/C Compressor Clutch Relay >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
P0645

The ECM detects an open on the control circuit of the A/C compressor clutch relay when commanded off with the engine in crank or run status.

P0646

The ECM detects a short to ground on the control circuit of the A/C compressor clutch relay when commanded off with the engine in crank or run status.

P0647

The ECM detects a short to voltage on the control circuit of the A/C compressor clutch relay when commanded off with the engine in crank or run status.

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