Diagnostic Test

Fig 1: Connect A Jumper Wire Between Water In Fuel Sensor Signal And Sensor Ground Circuits

Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Water In Fuel Sensor harness connector.

Connect a jumper wire between the (K303) and (K300) circuits at the Water In Fuel Sensor harness connector.

Turn the ignition on.

With the scan tool, check DTCs.

Does the scan tool display: WATER IN FUEL SENSOR FAULTED HIGH? 

Yes 

1. Replace the Water In Fuel Sensor.
2. Perform BODY VERIFICATION TEST .

No 

1. Go To step  2).

Fig 2: Measuring voltage on Water In Fuel Sensor Signal circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the BCM C2 harness connectors.

Ignition on, engine not running.

Measure the voltage on the (K303) Water In Fuel Sensor Signal circuit.

Is the voltage above 5.3 volts? 

Yes 

1. Repair the short to voltage in the (K303) Water In Fuel Sensor Signal circuit.
2. Perform BODY VERIFICATION TEST .

No 

1. Go To step  3).

Fig 3: Measuring Resistance Of Water In Fuel Sensor Signal Circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.

Measure the resistance of the (K303) Water In Fuel Sensor Signal circuit.

Is the resistance below 5.0 ohms? 

Yes 

1. Go To step  4).

No 

1. Repair the open in the (K303) Water In Fuel Sensor Signal circuit.
2. Perform BODY VERIFICATION TEST .

Fig 4: Measuring Resistance Of Sensor Ground Circuit

Courtesy of CHRYSLER LLC

Measure the resistance of the (K300) Sensor ground circuit.

Is the resistance below 5.0 ohms? 

Yes 

1. Go To step  5).

No 

1. Repair the open in the (K300) Sensor ground circuit.
2. Perform BODY VERIFICATION TEST .

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 Powertrain Control Module per Service Information.
2. Perform BODY VERIFICATION TEST .