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Re-Calibrating Actuators (Auxiliary HVAC)

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When replacing the auxiliary HVAC control module it will be necessary to allow the auxiliary HVAC control module to perform a calibration process. When installing the auxiliary HVAC control module be sure to perform the following:

  1. Place the ignition switch to the OFF position.
  2. Disconnect the scan tool.
  3. Install the auxiliary HVAC control module.
  4. Connect all previously disconnected components.
  5. Place the ignition switch in the RUN position.
  6. Wait 40 seconds for the auxiliary HVAC control module to self-calibrate.
  7. Verify that no DTCs have set as current DTCs.

When replacing an auxiliary HVAC actuator it will be necessary to allow the auxiliary HVAC control module to perform a calibration process. When installing the auxiliary HVAC actuator be sure to perform one of the following:

Preferred Method (w/Scan Tool)

  1. Clear all DTCs.
  2. Place the ignition switch in the OFF position.
  3. Install the auxiliary HVAC actuator.
  4. Connect all previously disconnected components.
  5. Place the ignition switch in the RUN position.
  6. With the scan tool, initiate the HVAC Actuator Recal. feature of the RHVAC/RSA module Special Functions menu.
  7. Verify that no DTCs have set as current DTCs.

Alternate Method (w/o Scan Tool)

  1. Clear all DTCs.
  2. Place the ignition switch to the OFF position.
  3. Install the auxiliary HVAC actuator.
  4. Connect all previously disconnected components.
  5. Remove the HVAC B fuse for a minimum of 10 seconds.
  6. Install the HVAC B fuse.
  7. Place the ignition switch in the RUN position.
  8. Wait 40 seconds for the auxiliary HVAC control module to self-calibrate.
  9. Verify that no DTCs have set as current DTCs.
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