Diagnostic Test

CHECK FOR RELATED DTCS
1. Ignition on, engine not running.
2. With the scan tool, read HVAC DTCs.
  Are there any Door Control Circuit Short to Voltage, Short to Ground or Open DTCs present?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
  No
  - Go To 2
CHECK IF DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read HVAC DTCs.
  Is this DTC active?
  
  Yes
  - Go To 4
  No
  - Go To 3
PERFORM HVAC ACTUATOR CALIBRATION TEST
1. With the scan tool, perform the HVAC Actuator Calibration Test.
  Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test?
  
  Yes
  - Go To 4
  No
  - Go To 6
CHECK THE RECIRCULATION DOOR
1. Remove the Recirculation Door Actuator and check the Recirculation Door stops, linkage (stripped or cracked) and door. Refer to ACTUATOR, RECIRCULATION DOOR, REMOVAL .
  Were there any problems found?
  
  Yes
  - Repair or replace the Recirculation Door as necessary in accordance with the Service Information. Refer to HOUSING, HVAC, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE RECIRCULATION DOOR ACTUATOR
1. Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to ACTUATOR, RECIRCULATION DOOR, REMOVAL .
2. With the scan tool, erase HVAC DTCs and perform the HVAC Actuator Calibration Test.
  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 STANDARD PROCEDURE .
  No
  - Test complete.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. With 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 STANDARD PROCEDURE .
  No
  - Test complete.