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Front Mode Door Travel Too Large

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition switch to ON position. Using scan tool, check for any active DTC/fault messages present for ATC module. If any DOOR NOT RESPONDING type of DTC/fault message is actively set in ATC module, go to appropriate procedure for active DTC/fault message. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. If any DOOR NOT RESPONDING type of DTC/fault messages are not actively set, go to next step.
  2. Turn ignition switch to OFF position. Remove suspect door actuator. Attempt to rotate suspect door actuator motor in both directions, by hand. If door actuator motor turns in either direction, replace faulty door actuator motor. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING. If door actuator motor did not turn in either direction, go to next step.
  3. Check mechanical operation and travel of door for removed actuator. Ensure door travels smoothly and through full range of motion. Check for binding, worn, missing or broken actuator gears and actuator-to-door linkages. Repair any mechanical faults that may exist as necessary. If door operation and travel is okay, replace ATC module. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING.
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