Diagnostic Aids
| • | The water in fuel sensor illuminates the water in fuel indicator 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 one of the following procedures: |
| - | Water-in-Fuel Draining for the 6.6L (LBZ and LLY) engine |
| - | Water-in-Fuel Draining for the 6.6L (LMM) engine |
| - | Water-in-Fuel Draining for the 7.8L engine |
| • | For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections . |
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Driver Information System Schematics Connector End View Reference: Master Electrical Component List | |||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||||
2 |
Does the water in fuel indicator illuminate in the message center? | Go to Step 3 | Go to Diagnostic Aids | ||||||
3 |
Does the water in fuel indicator illuminate in the message center? | Go to Step 4 | Go to Step 6 | ||||||
4 | Test the signal circuit of the water in fuel sensor for a short to ground. Refer to Circuit Testing and to Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 5 | ||||||
5 | Inspect for poor connections at the harness connector of the message center. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 7 | ||||||
6 | Inspect for poor connections at the harness connector of the water in fuel sensor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8 | ||||||
7 | Replace the message center. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- | ||||||
8 | Replace the water-in-fuel sensor. Refer to one of the following procedures:
Did you complete the replacement? | Go to Step 9 | -- | ||||||
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | ||||||
