Fuel Gauge Inaccurate or Inoperative

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

DIAGNOSTIC AIDS
^ Ensure that the fuel level is in the same range as the customer concern.
^ For intermittent diagnosis, refer to Testing for Intermittent and Poor Connections in Wiring Systems.
^ When the vehicle is operated in diagnostic mode the data supplied to the IPC is not filtered by the PZM. The unfiltered fuel data causes the IPC to show real time fuel level readings, this may be mistaken as an erratic fuel level display.