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Test Y: Water-In-Fuel Indicator Always On: Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet RV Cutaway, and 2001 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. If engine controls diagnostic system check diagnostic system check has been performed, go to next step. If IPC diagnostic system check has not been performed, go to ENGINE CONTROLS DIAGNOSTIC SYSTEM CHECK  .
    2. NOTE: Before proceeding, drain any water from fuel system.
  2. Turn ignition switch to RUN position. If water-in-fuel indicator does not illuminate briefly, then go out, go to next step. If water-in-fuel indicator illuminates briefly, then go out, go to step  4 .
  3. If water-in-fuel indicator remains illuminated, go to step  5 . If water-in-fuel indicator never illuminates, go to TEST X: WATER-IN-FUEL INDICATOR INOPERATIVE  .
  4. Operate vehicle under conditions which fault was noted. If system does not operate properly, go to step  2 . If system operates normally, problem may be intermittent. Try to recreate fault by wiggling wiring and connectors. Check for faulty connections at all connectors that may be causing intermittent condition.
  5. Disconnect water-in-fuel sensor 3-pin harness connector, located on left frame rail, near center of the vehicle. Turn ignition switch to RUN position. Using a test light connected to battery voltage, probe water-in-fuel sensor harness connector terminal "B" (Yellow/Black wire). See Figure . If test light illuminates, go to next step. If test light does not illuminate, go to step  7 .
  6. Repair short to ground in Yellow/Black wire between water-in-fuel sensor and IPC. After repair, go to step  8 .
  7. Replace water-in-fuel sensor. After repair, go to next step.
  8. Start engine. Operate vehicle under conditions which condition was noted. If system operates normally, system is okay at this time. If system does not operate properly, go to step  2 .
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