LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1712 (HVAC Systems - Automatic) >> Diagnostic Information and Procedures >> Re-Calibrating Actuators

Re-Calibrating Actuators

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The HVAC control module will relearn the actuator limits whenever power is disconnected and reconnected to the module.

Use the following steps to perform the calibration update:

  1. Turn OFF the ignition.
  2. Remove the battery positive voltage circuit fuse of the HVAC Control Module.
    3. IMPORTANT: The scan tool must be disconnected from the vehicle to properly perform the calibration procedure. If a scan tool is connected before this procedure is completed, then new calibration values will not be stored.
    IMPORTANT: Failure to wait 60 seconds will not allow the HVAC control module sufficient time to clear the old calibration values.
  3. Wait 60 seconds.
  4. Install the fuse.
  5. Turn ON the ignition.
  6. Wait 60 seconds before installing a scan tool.
scientia non olet · About LEMON Manuals