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Test X: Water-In-Fuel Indicator Inoperative: 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 has been performed, go to next step. If engine controls diagnostic system check has not been performed, go to ENGINE CONTROLS DIAGNOSTIC SYSTEM CHECK  .
  2. Turn ignition switch to RUN position. If water-in-fuel indicator does not illuminate briefly, go to next step. If water-in-fuel indicator illuminates briefly, go to step  6 .
  3. Disconnect water-in-fuel sensor, located on left frame rail, near center of the vehicle. Connect test light between ground and water-in-fuel sensor harness connector terminal "A" (Pink wire). If test light illuminates, go to next step. If test light does not illuminate, go to step  7 .
  4. Connect test light between water-in-fuel sensor harness connector terminals "A" (Pink wire) and "C" (Black wire). See Fig 1 . If test light illuminates, go to next step. If test light does not illuminate, go to step  9 .
    Fig 1: Identifying Water-In-Fuel Sensor Harness Connector Terminals
    G00062274Courtesy of GENERAL MOTORS CORP.
  5. Connect test light between ground and water-in-fuel sensor harness connector terminal "B" (Yellow/Black wire). If test light illuminates, go to step  8 . If test light does not illuminate, go to step  10 .
  6. Operate vehicle under conditions which fault was noted. If system operates properly, system is okay at this time. If system does not operate properly, go to step  2 .
  7. Check for open in Pink wire between GAUGES fuse (10-amp) in instrument panel fuse block and IPC harness connector terminal B17. See Figure and Figure . If Pink wire is okay, go to step  12 . If Pink wire is not okay, repair as necessary. After repair, go to step  12 .
  8. Check water-in-fuel connector for intermittent or poor terminal contact. If terminal contact is okay, go to step  11 . If terminal contact is not okay, repair as necessary. After repair, go to step  12 .
  9. Check for open in Black wire between ground and water-in-fuel sensor harness connector terminal "C". If Black wire is okay, go to step  11 . If Black wire is not okay, repair as necessary. After repair, go to step  12 .
  10. Repair open in Yellow/Black wire between water-in-fuel sensor and IPC. After repair, go to step  12 .
  11. Replace water-in-fuel sensor. After repair, go to next step.
  12. Operate system to verify fault no longer exists. If fault still exists, go to step  2 .
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