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Diagnostic Procedure

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DIAGNOSTIC PROCEDURE - FUEL GAUGE INACCURATE

TEST ACTION APPLICABILITY
1
NOTE: Diagnose and repair any PCM Fuel Level DTCs before proceeding with this test.
With the DRBIII®, read DTCs.Does the DRBIII® display any Fuel Level Sensor DTCs?Yes --> Refer to Fuel Level Sensor DTCs.No --> Go To 2		 All
2 Perform the Instrument Cluster Self Test .
Depress and hold the Trip Odometer reset button while turning the ignition on.
NOTE: The Instrument Cluster Self Test can also be performed using the DRBIII®.

Observe the Fuel Gauge calibration points during the Self Test.
The Fuel Gauge indicator needle should pause at the following positions:
Off: Empty Stop below "E"
Calibration Point 1: "1/4"
Calibration Point 2: "1/2"
Calibration Point 3: "F"
Calibration Point 4: "3/4"
Calibration Point 5: "1/2"
Calibration Point 6: "1/4"
Calibration Point 7: "E"
Did the Fuel Gauge needle pause at the correct calibration points?
Yes --> Go To 3
No --> Replace and configure the Instrument Cluster in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1  .		 All
3 With the DRBIII®, select Body, MIC, then Monitors.
Read the Fuel Tank Level Volts.
Compare the Fuel Tank Level Volts displayed by the DRBIII® to the Fuel Gauge using the following values:
4.3 - 3.19 Volts (Approximately 220 - 200 Ohms of Fuel Sensor Resistance) = "E"
2.56 Volts (Approximately 160 Ohms of Fuel Sensor Resistance) = "1/4"
1.91 Volts (Approximately 120 Ohms of Fuel Sensor Resistance) = "1/2"
1.27 Volts (Approximately 80 Ohms of Fuel Sensor Resistance) = "3/4"
0.319 - .646 Volts (Approximately 20 - 40 Ohms of Fuel Sensor Resistance) = "F"
NOTE: Fuel Tank Level Voltage should be within +/- 0.2 volts.

Is the displayed Fuel Tank Level voltage correct?
Yes --> The condition is not present at this time. Monitor DRBIII® parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring harness and connector terminals.
No --> Replace the Fuel Level Sensor in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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