Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

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 3
  No
  - Go To 2
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 3
  No
  - Go To 6
CHECK THE MODE DOOR ACTUATOR

Fig 1: Measuring Resistance Between Mode Door Driver Circuit And Common Door Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Measure the resistance between the (C35) Mode Door Driver circuit and the (C34) Common Door Driver circuit.
  Is the resistance 38.0 Ohms (± 5.0 Ohms)?
  
  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
  - Go To 4
CHECK THE (C35) MODE DOOR DRIVER CIRCUIT FOR AN OPEN

Fig 2: Measuring Resistance Of Mode Door Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Mode Door Actuator harness connector.
3. Measure the resistance of the (C35) Mode Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door Actuator harness connector.
  Is the resistance above 1.0 Ohm?
  
  Yes
  - Repair the (C35) Mode Door Driver circuit for an open or high resistance.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN

Fig 3: Measuring Resistance Of Common Door Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door Actuator harness connector.
  Is the resistance above 1.0 Ohm?
  
  Yes
  - Repair the (C34) Common Door Driver circuit for an open or high resistance.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Mode Door Actuator in accordance with the Service Information. Refer to ACTUATOR, MODE DOOR, REMOVAL .
  - 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.