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