Diagnostic Test

CHECK FOR RELATED DTCS
1. Ignition on, engine not running.
2. Using the scan tool, read HVAC DTCs.
  Are there any Mode Door Actuator Control or Sensor Control DTCs present?
  
  Yes
  - Refer to DTC INDEX and perform the appropriate diagnostic procedure.
  No
  - Go To 2
CHECK IF DTC IS ACTIVE
1. Ignition on, engine not running.
2. Using the HVAC controls, switch to all modes from floor, panel and defrost and then back again.
3. Using the scan tool, read HVAC DTCs.
  Is this DTC active?
  
  Yes
  - Go To 3
  No
  - Go To 5
CHECK THE MODE DOOR
1. Turn the ignition off to the lock position.
2. Remove the Mode Door Actuator and check the Mode Door for binding and full travel. Refer to ACTUATOR, MODE DOOR, REMOVAL .
  Were there any problems found?
  
  Yes
  - Repair or replace the Mode Door as necessary in accordance with the Service Information. Refer to HOUSING, HVAC, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Go To 4
CHECK THE MODE DOOR ACTUATOR
1. Turn the ignition off to the lock position.
2. Replace the Mode Door Actuator in accordance with the Service Information. Refer to ACTUATOR, MODE DOOR, REMOVAL .
3. Reconnect all previously disconnected connectors.
4. Ignition on, engine not running.
5. Using the scan tool, erase HVAC DTCs.
6. Using the scan tool, perform the HVAC Actuator Calibration Test.
7. Turn the ignition off to the lock position for 30 seconds.
8. Ignition on, engine running.
9. Using the HVAC controls, switch to all modes from floor, panel and defrost and then back again.
10. With the scan tool, read HVAC DTCs.
  Did this DTC reset?
  
  Yes
  - Replace and program the A/C Heater Control in accordance with the Service Information. Refer to CONTROL, A/C AND HEATER, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Test complete.
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.
3. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. Wiggle the wiring and connectors while checking for shorted and open circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Test complete.