Symptom:
*FUEL GAUGE INACCURATE
POSSIBLE CAUSES
DTC PRESENT
INSTRUMENT CLUSTER
FUEL LEVEL SENSOR WIRING
FUEL LEVEL SENSOR
TEST ACTION APPLICABILITY
1 NOTE: Diagnose and repair any PCI Bus problems before proceeding with
this test.
Turn the ignition on.
With the DRBIIIt, read the PCM DTCs.
Does the DRBIIIt display any Fuel Level Sensor related DTC?
All
Yes → Refer to the Powertrain Diagnostic Information for the related
symptom(s).
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
No → Go To 2
2 Perform the Instrument Cluster Self Test as follows:
Turn the ignition off.
Press and hold the Trip/Reset button.
Turn the ignition on.
Observe the Fuel Gauge during the Self Test.
The Fuel Gauge pointer should pause at each of these following positions: E, 1/4, 1/2,
3/4, Full, and back to E.
Does the Fuel Gauge function as described above?
All
Yes → Go To 3
No → Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
Disconnect the PCM C2 and C3 harness connectors.
Measure the resistance of the Fuel Level Sensor Signal circuit between the Fuel
Pump Module harness connector and the PCM harness connector.
Measure the resistance of the Sensor Ground circuit between the Fuel Pump Module
harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms on both circuits.
All
Yes → Replace the Fuel Level Sensor in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Repair the circuits with a resistance above 5.0 ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.
449
INSTRUMENT CLUSTER
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