Dodge Nitro. Manual — part 704

Turn the ignition off.

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

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

Yes

Repair as necessary in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 3).

3) CHECK MODE DOOR TRAVEL

Remove the Mode 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 90 degrees of travel.

Does the door operate smoothly in both directions over approximately 90 degrees of travel?

Yes

Replace the Mode 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 .

B1045-PANEL MODE DOOR 1 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 Mode 1 (Floor to Panel) 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)
MODE DOOR OR A/C HEATER HOUSING COMPONENTS WARPED, WORN, DAMAGED,
MISSING, BROKEN
MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

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) CHECK FOR A BROKEN MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR

Turn the ignition off.

Remove the Mode Door 1 (Floor to Panel) Actuator from the A/C Heater Housing Assembly.

By hand, attempt to rotate the actuator in both directions.

Does the actuator turn in either direction?

Yes

Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 3).

3) CHECK MODE 1 (FLOOR TO PANEL) DOOR & A/C HEATER HOUSING FOR WARPED,
WORN, DAMAGED, MISSING, & BROKEN COMPONENTS

Inspect for excessively worn, disconnected, missing, or broken door linkage. Inspect for a damaged or
broken A/C Heater Housing Assembly. Inspect for a warped or broken door, and missing door seals.
Rotate the door from stop to stop. The door should rotate approximately 90 degrees.

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

Yes

Repair as necessary in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the service information.
Then, go to 4).

4) RUN THE ACTUATOR CALIBRATION TEST

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

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 .

No

Perform BODY VERIFICATION TEST - VER 1 .

B1058-RECIRCULATION DOOR CONTROL CIRCUIT/PERFORMANCE

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro