Dodge Nitro. Manual — part 702

Fig. 19: Measuring Resistance Between (C54) Blend Door Driver Circuit And (C154) Common
Door Driver Circuit In A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC

Measure the resistance between the (C54) Blend Door Driver circuit and the (C154) Common Door
Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance between 30 and 40 ohms?

Yes

Go to 13).

No

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

Perform BODY VERIFICATION TEST - VER 1 .

13) RUN THE ACTUATOR CALIBRATION TEST

Reconnect the A/C Heater Control C1 harness connector.

Turn the ignition on.

With the scan tool, erase HVAC DTCs.

Turn the ignition off, wait 10 seconds, and then 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.

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Does the scan tool only display: B1040-PANEL MODE DOOR 1 CONTROL
CIRCUIT/PERFORMANCE?

Yes

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

Perform BODY VERIFICATION TEST - VER 1 .

No, Other DTC(s) Displayed

Diagnose and repair the other DTC(s). Refer to the DIAGNOSTIC CODE INDEX for a complete
list of all HVAC related symptoms.

No, And No Other DTCs Displayed

Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an
intermittent short. Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1 .

B1043-PANEL MODE DOOR 1 CONTROL CIRCUIT OPEN

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Fig. 20: Panel Mode Door 1 Control Circuit Schematic
Courtesy of CHRYSLER LLC

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

The A/C Heater Control drives the Mode Door Actuator via the (C35) Mode Door Driver circuit and the (C154)

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Common Door Driver circuit.

When Monitored:

With the ignition on.

Set Condition:

If Mode Door Actuator's electrical circuit is open.

Diagnostic Test

1) ACTIVE DTC(S) PRESENT

Turn the ignition on.

Using the A/C Heater Control, actuate the Panel Mode Door.

With the scan tool, check for DTCs.

Does the scan tool display this DTC as active?

Yes

Go to 2).

No

The condition that caused this symptom is currently not present. Check for an intermittent
condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken
wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or
contaminated terminals. Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1 .

2) CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN

Possible Causes

(C35) MODE DOOR DRIVER CIRCUIT OPEN
(C154) COMMON DOOR DRIVER CIRCUIT OPEN
MODE DOOR ACTUATOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro