HVAC System Control Module Programming and Setup

HVAC System Control Module Programming and Setup

The heating, ventilation, and air conditioning control (HVAC) module must be programmed with the proper calibration software. The module stores and utilizes this information however if it is not properly configured with the correct calibration software, the HVAC module will not control all of the vehicle features properly.

Ensure that the following conditions exist in order to prepare for HVAC module programming:

1. The battery is fully charged.
2. The MDI data link connectors are secure.
3. The scan tool is loaded with the most current software version.
4. All disconnected modules and devices are reconnected securely.
5. This entire procedure has been reviewed before proceeding.

Do not reprogram the HVAC module unless directed by a service procedure or a service bulletin.

Heating, Ventilation, and Air Conditioning Control (HVAC) Module Programming

To program and setup an existing or new replacement HVAC module, perform the following procedure:

1. With a scan tool, access the Service Programming System (SPS) and follow the on-screen instructions. Refer to Service Programming System (SPS) (Service Programming System (SPS)).
2. On the SPS Supported Controllers screen, select ECC Remote Heater and Air Conditioning Control Module - Programming and follow the on-screen instructions.
3. On the SPS Supported Controllers screen, select ECC Remote Heater and Air Conditioning Control Module - Setup and follow the on-screen instructions.

If the HVAC module fails to accept the program, verify all scan tool and HVAC module connections are secure.

Note: After programming is completed, perform the following to avoid future misdiagnosis:

1. Turn the ignition OFF for 10 seconds.
2. Open and close the door.
3. Connect the scan tool to the data link connector.
4. Ignition ON, engine OFF.
5. With a scan tool, clear all DTC's from all modules.