Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IF THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. Using the scan tool, read HVAC DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2
  No
  - Go To 6
CHECK LEFT FLOOR DUCT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off to the lock position.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Disconnect the Left Floor Duct Temperature Sensor harness connector.
4. Ignition on, engine not running.
5. Measure the voltage of the Left Floor Duct Temperature Sensor Signal circuit.
  Is there any voltage present?
  
  Yes
  - Repair the Left Floor Duct Temperature Sensor Signal circuit for a short to voltage.
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Go To 3
CHECK THE LEFT FLOOR DUCT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN
1. Turn the ignition off to the lock position.
2. Measure the resistance of the Left Floor Duct Temperature Sensor Signal circuit between the A/C Heater Control C1 harness connector and the Left Floor Duct Temperature Sensor harness connector.
  Is the resistance above 1.0 Ohm?
  
  Yes
  - Repair the Left Floor Duct Temperature Sensor Signal circuit for an open or high resistance.
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Go To 4
CHECK THE SENSOR GROUND CIRCUIT FOR AN OPEN
1. Measure the resistance of the Sensor Ground circuit between the A/C Heater Control C1 harness connector and the Left Floor Duct Temperature Sensor harness connector.
  Is the resistance above 1.0 Ohm?
  
  Yes
  - Repair the Sensor Ground circuit for an open or high resistance.
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Go To 5
CHECK THE LEFT FLOOR DUCT TEMPERATURE SENSOR
1. Turn the ignition off to the lock position.
2. Replace the Left Floor Duct Temperature Sensor in Accordance with the Service Information. Refer to SENSOR, EVAPORATOR TEMPERATURE, REMOVAL .
3. Ignition on, engine not running.
4. Using the scan tool, erase HVAC DTCs.
5. Cycle the ignition off for 30 seconds then back on.
6. With the scan tool, read HVAC DTCs.
  Does this DTC reset?
  
  Yes
  - Replace and program the HVAC Module in accordance with the Service Information. Refer to MODULE, HVAC, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Test complete.
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
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.