WATER IN FUEL SENSOR FAULTED LOW (BCM)
For a complete wiring diagram Refer to Section 8W.
Diagnostic Test
- When Monitored:
With the Ignition on.
- Set Condition:
The BCM detects a Low condition on the Water In Fuel Sensor Signal Circuit.
| Possible Causes |
| (K303) WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| (K303) WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO THE (K300) SENSOR GROUND CIRCUIT |
| WATER IN FUEL SENSOR |
| BCM |
Diagnostic Test
1. WATER IN FUEL SENSOR
Turn the ignition off.
Disconnect the Water in fuel sensor harness connector.
Turn the ignition on.
NOTE: Check connectors - Clean/repair as necessary.
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
- Replace the Water in fuel sensor.
- Perform BODY VERIFICATION TEST VER - 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 2
2. (K303) WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Disconnect the BCM C2 connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the (K303) Water In Fuel Sensor Signal circuit.
Is the resistance less than 10 ohms?
Yes
- Repair the (K303) Water In Fuel Sensor Signal circuit for a short ground.
- Perform BODY VERIFICATION TEST VER - 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 3
3. (K303) WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO THE (K300) SENSOR GROUND CIRCUIT
Disconnect the BCM C2 connector.
NOTE: Check connectors - Clean/repair as necessary.
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
- Repair the (K303) Water In Fuel Sensor Signal circuit for a short to the (K300) Sensor Ground circuit.
- Perform BODY VERIFICATION TEST VER - 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 4
4. BCM
NOTE: Before continuing, check the BCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
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
- Replace and program the Body Control Module per Service Information.
- Perform BODY VERIFICATION TEST VER - 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)