Dodge Nitro. Manual — part 722

Does the ohm meter read open circuit?

Yes

Repair the (C121) Sensor Ground circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 5).

5) CHECK THE SUNLOAD SENSOR

Reconnect the A/C Heater Control C1 harness connector.

Turn the ignition on.

Using the scan tool, observe the Auto Headlamp signal while connecting a jumper wire between the
(L24) Auto Headlamps Signal circuit and the (C121) Sensor Ground circuit in the Sunload Sensor harness
connector.

Does the Auto Headlamp signal change from approximately 5 volts to 0 volts?

Yes

Replace the Sunload Sensor 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 .

B1611-AMBIENT LIGHT SENSOR INPUT CIRCUIT HIGH

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

With the ignition on.

Set Condition:

If the Ambient Light Sensor input is out of range toward the high voltage threshold.

Possible Causes

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Diagnostic Test

1) CHECK FOR ACTIVE DTC WITH THE SUNLOAD SENSOR HARNESS CONNECTOR
DISCONNECTED

Turn the ignition off.

Disconnect the Sunload Sensor harness connector.

Turn the ignition on.

With the scan tool, erase HVAC DTCs.

Turn the ignition off, wait 10 seconds, and turn the ignition on.

With the scan tool, read HVAC DTCs.

Does the scan tool display this DTC as active?

Yes

Go to 2).

No

Replace the Sunload Sensor in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

2) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Measure the voltage of the (L24) Auto Headlamps Signal circuit between ground and the A/C Heater
Control C1 harness connector.

Is there any voltage present?

Yes

Repair the (L24) Auto Headlamps Signal circuit for a short to voltage.

(L24) AUTO HEADLAMPS SIGNAL CIRCUIT SHORTED TO VOLTAGE
SUNLOAD SENSOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

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 .

B210A-SYSTEM VOLTAGE LOW

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Fig. 56: Fused Run-Start Relay Output Circuit Schematic
Courtesy of CHRYSLER LLC

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