Dodge Nitro. Manual — part 724

With the ignition switch on.

Set Condition:

The A/C Heater Control has detected the system voltage is high.

Diagnostic Test

1) ACTIVE DTC(S) PRESENT

Turn the ignition on.

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 (F943) FUSED RUN-START RELAY OUTPUT CIRCUIT FOR A SHORT TO
BATTERY VOLTAGE

Possible Causes

(F943) FUSED RUN-START RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Fig. 59: Using Volt Meter Measure Voltage On (F943) Fused Run-Start Relay Output Circuit In
A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Using a volt meter measure the voltage on the (F943) Fused Run-Start Relay Output circuit in the A/C
Heater Control C1 harness connector.

Is there any voltage present?

Yes

Repair the (F943) Fused Run-Start Relay Output circuit for a short to voltage.

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 .

B2214-(HVAC) CLIMATE CONTROL INTERNAL

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

With the ignition on.

Set Condition:

If the A/C Heater Control has an internal fault. This DTC has a maturing time of 5 seconds and a de-
maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for
100 ignition cycles.

Diagnostic Test

1) ACTIVE DTC(S) PRESENT

Turn the ignition on.

With the scan tool, check for 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

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 .

B222A-VEHICLE LINE MISMATCH

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

With the ignition on.

Set Condition:

The A/C Heater Control will receive and monitor the vehicle line message from the PCM and record the
vehicle line if different from the last vehicle line.

Possible Causes

A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Diagnostic Test

1) ACTIVE DTC(S) PRESENT

Turn the ignition on.

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 VEHICLE LINE IN PCM

With the scan tool compare the vehicle line that is programmed into the PCM to the vehicle line of the
vehicle.

Does the vehicle line programmed into the PCM match the vehicle?

Yes

Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the
A/C Heater Control in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Replace and program the Powertrain Control Module in accordance with the service information.
Ensure the PCM is replaced with the correct vehicle line PCM.

Perform POWERTRAIN VERIFICATION TEST .

U0010-CAN INTERIOR BUS

Possible Causes

PCM
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro