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Inaccurate Fuel Indication

  1. Disconnect harness 14405/14401 connector, under instrument panel, at fuse block. Connect a 47-ohm resistor between Yellow/White wire (Pin No. 7) of 14401 connector and ground. Place ignition switch in "ACC" position. Fuel gauge display should read 5-6 gallons (19-22 liters). If okay, turn ignition off and go to next step. If not, go to step 3).
    NOTE: Ignition must be off when connecting or disconnecting a resistor at harness.
  2. Connect a 100-ohm resistor between Yellow/White wire (Pin No. 7) of 14401 connector and ground. Place ignition switch in "ACC" position. Fuel gauge display should read 13-14 gallons (48-54 liters). If okay, go to step 4). If not, go to next step.
  3. Disconnect EIM connector. Measure resistance of Yellow/White wire between EIM connector and 47-ohm and 100-ohm resistors connected to 14401 connector. Ohmmeter should read 47 ohms and 100 ohms respectively. If reading is okay, replace EIM. If not, repair Yellow/White wire (Circuit No. 29) as required.
  4. Lower fuel tank to access fuel gauge sending unit. Using jumper wire, connect sending unit connector to ground. Measure resistance between 14405 connector and ground. If reading is 0-1 ohm, go to step 5). If reading is greater than one ohm, repair Circuit No. 29 as required.
  5. Check fuel gauge sending unit for binding, sticking, or other damage. If sending unit is okay, go to next step. If not, replace fuel gauge sending unit.
  6. Check fuel tank for dents, bulges, or other damage. If damaged, repair or replace tank as necessary. If tank is okay, fault is being caused by other vehicle system(s).
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