Diagnostic Aids
| • | The water in fuel sensor illuminates the Water in Fuel message when there is water in the fuel system. Perform the Water in Fuel Draining procedure before performing the following test steps to accurately determine if a malfunction exists. Refer to Water-in-Fuel Draining in Engine Controls - 6.6L |
| • | For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics , and Engine Controls Schematics Connector End View Reference: Engine Control Module Connector End Views | |||
1 | Did you perform the Instrument Cluster Diagnostic System Check? | Go to Step 2 | |
2 | Does the Water In Fuel message remain illuminated in the driver information center after the displays test? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 |
Does the Water In Fuel message illuminate in the driver information center? | Go to Step 4 | Go to Step 6 |
4 | Test the signal circuit of the water in fuel switch for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 5 |
5 |
Does the Water In Fuel parameter display Off? | Go to Step 8 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the water in fuel switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
8 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
9 | Replace the water in fuel switch. Refer to Water in Fuel Indicator Sensor Replacement in Engine Controls - 6.6L. Did you complete the replacement? | Go to Step 12 | -- |
10 |
Important: Program the replacement PCM. Replace the PCM. Refer to Engine Control Module Replacement in Engine Controls - 6.6L. Did you complete the replacement? | Go to Step 12 | -- |
11 |
Important: Program the replacement IPC. Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
