Reading and Clearing Diagnostic Trouble Codes

HVAC MODULE COLD BOOT PROCESS

The purpose of the cold boot process is to allow the HVAC module to reinitialize and calibrate the actuators. To carry out the cold boot process, follow the steps below.

1. Turn the ignition switch to the OFF position.
2. Disconnect the HVAC module electrical connectors.
3. Inspect the module connectors for:
- corrosion.
- pushed-out pins.
- incorrectly seated connector.

4. Wait one minute.
5. Connect the HVAC module electrical connectors.
6. Turn the ignition switch to the ON position.
7. Select any position except OFF on the HVAC module.

The HVAC module will now initialize and calibrate the actuators. Calibration of the actuators will take approximately 30 seconds.