Test Description
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 numbers below refer to the step numbers on the diagnostic table.
- 4) -. The HVAC control module is inoperative when the module does not respond to an operator control request.
- 5) - If the condition does not occur when an A/C request has been made then you must bypass the A/C performance test procedures.
- 6) - These actions are the enable criteria for the A/C compressor to operate. Ambient air temperature must be above 3°C (38°F) in order for this A/C compressor test to be run.
- 7) - Performing the Air Conditioning System Performance Test ensures that the A/C system is operating properly for further testing.
- 9) - If no condition found with all conditions listed then compare door travel to known good vehicle.
- 15) - The voltage will vary between 0-5 volts during normal operation. Ensure to observe the air temperature actuator driveshaft and the volt meter when jumping the control circuit with 5 volt reference and the ground circuits. The air temperature actuator and the HVAC control assembly connectors must be connected during this step.