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Home >> Isuzu >> 2003 >> Rodeo S, 2.2 D, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P0463: Fuel Level Sensor Circuit - High Input >> Diagnostic Procedure
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Diagnostic Procedure

  1. Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
  2. Turn ignition on. On scan tool observe FUEL LEVEL parameter. If parameter is 99-100 percent, go to step  4 . If parameter is not as specified, go to next step.
  3. Test fuel gauge operation. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
  4. Turn ignition off. Using DVOM, backprobe fuel level sensor input at sensor input cavity. See WIRING DIAGRAMS  . If reading is 2.9 volts or more, go to next step. If reading is less than 2.9 volts, go to step  6 .
  5. Check for open in fuel level sensor ground circuit. If problem is found, go to step  7 . If no problem was found, go to next step.
  6. Check for open in fuel level sensor ground. If a problem was found, go to step  9 . If no problem was found, go to step  10 .
  7. Locate and repair short to voltage in fuel level input circuit. See WIRING DIAGRAMS  . After repairs are complete, go to step  11 .
  8. Locate and repair short to voltage in fuel level sensor output circuit. After repairs are complete, go to step  11 .
  9. Repair open in fuel level sensor ground. See WIRING DIAGRAMS  . After repairs are complete, go to step  11 .
  10. Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT  under POWERTRAIN CONTROL MODULE. After repairs are complete, go to next step.
  11. Using scan tool, select DTC and clear DTC information. Start engine and idle to normal operating temperature. Select specified DTC INFO for DTC set. Operate vehicle within CONDITIONS FOR SETTING DTC  . If scan tool indicates DTC P0463 RAN AND PASSED, system is okay. If scan tool does not indicate system RAN AND PASSED, repeat test starting in step  2 .
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