P2266-WATER IN FUEL (WIF) SENSOR VOLTAGE TOO LOW
For a complete wiring diagram, refer to wiring information.
-
When Monitored:
With the ignition on.
-
Set Condition:
Low voltage detected at the Water In Fuel (WIF) Sensor signal circuit at the PCM.
Possible Causes |
|---|
| (G123) WIF SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| (G123) WIF SENSOR SIGNAL CIRCUIT SHORTED TO (K923) WIF SENSOR GROUND |
| WATER IN FUEL SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| 1. | Ignition on, engine not running. |
| 2. | With the scan tool check for active DTCs. |
Is the DTC active?
Yes
- Go To 2
No
- Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
 |
| 1. | Turn the ignition off. |
| 2. | Disconnect the Water In Fuel (WIF) Sensor harness connector. |
| NOTE: | Check connectors - Clean/repair as necessary. |
| 3. | Turn ignition on, engine not running. |
| 4. | Measure the voltage between the (G123) WIF Sensor signal circuit and (K923) WIF sensor ground circuit of the WIF Sensor harness connector. |
Is the voltage approximately 3.2 Volts?
Yes
- Replace the Water In Fuel Sensor in accordance with the service information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
-
Go To 3
3. CHECK THE (G123) WIF SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
 |
| 1. | Turn ignition off. |
| 2. | Disconnect the PCM C1 harness connector. |
| NOTE: | Check connectors - Clean/repair as necessary. |
| 3. | Measure resistance between the (G123) WIF Sensor signal circuit and ground at the WIF Sensor harness connector. |
Is the resistance above 10k Ohms?
Yes
- Go To 4
No
- Repair the short to ground in the (G123) WIF Sensor signal circiut.
-
Perform the
PCM VERIFICATION TEST. (Refer
to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard
Procedure).
 |
| 1. | Measure the resistance between the (G123) WIF Sensor signal circuit and the (K923) WIF Sensor ground circuit at the sensor connector. |
Is the resistance above 10k Ohms?
Yes
- Replace the Powertrain Control Module in accordance with the service information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Repair the short between the (G123) WIF Sensor signal circuit and the (K923) WIF Sensor ground circuit.
-
Perform the
PCM VERIFICATION TEST. (Refer
to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard
Procedure).