Diagnostic Test

Fig 1: Measuring Voltage Between Signal Circuit And Return Circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Water in fuel sensor harness connector.

Turn the ignition on.

Measure the voltage between the signal circuit and return circuit of the WIF sensor harness connector.

Is the voltage between 4.5 and 5.5 volts? 

Yes 

1. Replace the Water in fuel sensor.
2. Perform BODY VERIFICATION TEST .

No 

1. Go To step  2).

Fig 2: Measuring Resistance Between Ground And Water In Fuel Sensor Signal Circuit

Courtesy of CHRYSLER LLC

Disconnect the BCM C2 connector.

Measure the resistance between ground and the (K303) Water In Fuel Sensor Signal circuit.

Is the resistance less than 10 ohms?  

Yes 

1. Repair the (K303) Water In Fuel Sensor Signal circuit for a short ground.
2. Perform BODY VERIFICATION TEST .

No 

1. Go To step  3).

Fig 3: Measuring Resistance Between Water In Fuel Sensor Signal Circuit And Sensor Ground Circuit

Courtesy of CHRYSLER LLC

Disconnect the BCM C2 connector.

Measure the resistance between the (K303) Water In Fuel Sensor Signal circuit and the (K300) Sensor Ground circuit.

Is the resistance less than 10 ohms?  

Yes 

1. Repair the (K303) Water In Fuel Sensor Signal circuit for a short to the (K300) Sensor Ground circuit.
2. Perform BODY VERIFICATION TEST .

No 

1. Go To step  4).

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

If there are no possible causes remaining, view repair. 

Repair 

1. Replace and program the Body Control Module per Service Information.
2. Perform BODY VERIFICATION TEST .