Dodge Nitro. Manual - part 710

No  

Go to 4).  

4) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE 

Fig. 39: Measuring Resistance Between (C32) Recirculation Door Driver Circuit And (C154) 
Common Door Driver 2 Circuit In A/C Heater Control C1 Harness Connector 
Courtesy of CHRYSLER LLC 

Reconnect the Recirculation Door Actuator harness connector. 

Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common 
Door Driver 2 circuit in the A/C Heater Control C1 harness connector. 

Is the resistance between 30 and 40 ohms?  

Yes  

Replace the Recirculation Door Actuator in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Replace the A/C Heater Control in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

B105C-RECIRCULATION DOOR TRAVEL RANGE TOO SMALL 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

  

The A/C Heater Control calibrates each actuator individually. Automatic calibration occurs upon power up after 
installing a new A/C Heater Control. Manual calibration occurs by sending a command with the scan tool. The 
purpose of actuator calibration is to determine the total span of door travel between physical stops. To calibrate 
the actuator, the A/C Heater Control first moves the door to its soft stop, and then counts the number of pulses it 
takes to move the door to its other stop. An expected range of span is stored in the control's memory. If the 
measured calibration value is less than the expected range for this actuator, this DTC will set. Note that the 
control clears all stored calibration faults at the beginning of the calibration procedure. 

When Monitored: 

During actuator calibration. 

Set Condition: 

If the total span of the Recirculation Door is less than the low range limit. 

Diagnostic Test 

1) CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT 
OPEN DTCs 

Turn the ignition on. 

With the scan tool, read active HVAC DTCs. 

Does the scan tool display any active CONTROL CIRCUIT/PERFORMANCE or CONTROL 
CIRCUIT OPEN DTCs?  

Yes  

Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode 
Door Control Circuit/Performance DTCs first, all other Control Circuit/Performance DTCs second, 
and all Control Circuit Open DTCs last. Refer to the DIAGNOSTIC CODE INDEX for a 
complete list of all HVAC related symptoms.  

No  

Go to 2).  

2) INSPECT ACTUATOR & HOUSING ASSEMBLY FOR A CONDITION CAUSING THE 
DOOR TO SEIZE OR BIND 

Possible Causes 

DOOR DRIVER ELECTRICAL CIRCUIT(S)
RECIRCULATION DOOR SEIZED, BINDING, OBSTRUCTED
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

  

Turn the ignition off. 

Inspect the actuator and the housing assembly for a condition causing the door to seize or bind. 

Are there any physical or mechanical problems with the door, housing, or actuator?  

Yes  

Repair as necessary in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Go to 3).  

3) CHECK RECIRCULATION DOOR TRAVEL 

Remove the Recirculation Door Actuator from the A/C Heater Housing Assembly. 

By hand, attempt to rotate the door in both directions. The door should operate smoothly in both 
directions over approximately 70 degrees of travel. 

Does the door operate smoothly in both directions over approximately 70 degrees of travel?  

Yes  

Replace the Recirculation Door Actuator in accordance with the service information. Then, go to 
4).  

No  

Repair as necessary in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

4) RUN THE ACTUATOR CALIBRATION TEST 

Turn the ignition on. 

With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is 
complete, select View DTCs. 

Does the scan tool display this DTC as active?  

Yes  

Replace the A/C Heater Control in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 . 

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

  

No  

Perform BODY VERIFICATION TEST - VER 1 .  

B105D-RECIRCULATION DOOR TRAVEL RANGE TOO LARGE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

The A/C Heater Control calibrates each actuator individually. Automatic calibration occurs upon power up after 
installing a new A/C Heater Control. Manual calibration occurs by sending a command with the scan tool. The 
purpose of actuator calibration is to determine the total span of door travel between physical stops. To calibrate 
the actuator, the A/C Heater Control first moves the door to its soft stop, and then counts the number of pulses it 
takes to move the door to its other stop. An expected range of span is stored in the control's memory. If the 
measured calibration value exceeds the expected range for this actuator, this DTC will set. Note that the control 
clears all stored calibration faults at the beginning of the calibration procedure. 

When Monitored: 

During actuator calibration. 

Set Condition: 

If the total span of the Recirculation Door exceeds the high range limit. 

Diagnostic Test 

1) CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT 
OPEN DTCs 

Turn the ignition on. 

With the scan tool, read active HVAC DTCs. 

Does the scan tool display any active CONTROL CIRCUIT/PERFORMANCE or CONTROL 
CIRCUIT OPEN DTCs?  

Yes  

Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode 

Possible Causes 

DOOR DRIVER ELECTRICAL CIRCUIT(S)
RECIRCULATION DOOR OR A/C HEATER HOUSING COMPONENTS WARPED, WORN, 
DAMAGED, MISSING, BROKEN
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro