Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
P0462-FUEL LEVEL SENSOR NO. 1 LOW DIAGNOSTIC TEST REFERENCE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Ignition on, engine not running. With the DRBIII®, read DTCs and record the related Freeze Frame data. With the DRBIII®, read the Fuel Level Sensor voltage. Is the Fuel Level Sensor voltage below 0.0196 of a volt? Yes --> Go To 2 No --> Refer to the INTERMITTENT CONDITION SYMPTOM . Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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| 2 | Turn the ignition off. Disconnect the Fuel Pump Module harness connector. Ignition on, engine not running. With the DRBIII®, read the Fuel Level Sensor voltage. Did the Fuel Level Sensor voltage change from below 0.4 of a volt to above 4.0 volts? Yes --> Replace the Fuel Level Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 3 |
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| 3 | Turn the ignition off. Disconnect the C2 and C3 PCM harness connectors. Measure the resistance between ground and the (N4) Fuel Level Signal circuit at the Fuel Level Sensor harness connector. Is the resistance below 100 ohms? Yes --> Repair the short to ground in the (N4) Fuel Level Signal circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 4 |
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| 4 | Measure the resistance between the (N4) Fuel Level Signal circuit and the (K900) Sensor ground circuit at the Fuel Pump Module harness connector. Is the resistance below 5.0 ohms? Yes --> Repair the short between the (K900) Sensor ground and the (N4) Fuel Level Signal circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 5 |
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| 5 |
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.If there are no possible causes remaining, view repair.RepairReplace and program the Powertrain Control Module per Service Information.Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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