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Home >> Jeep >> 2005 >> Wrangler X, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 628 (Powertrain Diagnostic Procedures - DRIVEABILITY - NGC Symptoms & Diagnostic Tests (DTCS P0016 To P0563)) >> DRIVEABILITY - NGC - Diagnostic Tests >> P0462-Fuel Level Sensor No. 1 Low (Gas - NGC) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to VERIFICATION TESTS for appropriate verification test procedures.
  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 0.4 of a volt?

    1. Yes --> Go To 2
    2. No --> Refer to the SYMPTOM: INTERMITTENT CONDITION  Symptom (Diagnostic Procedure).

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

  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?

    1. Yes --> Replace the Fuel Level Sensor.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

    2. No --> Go To 3
  3. Turn the ignition off.

    Disconnect the 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?

    1. Yes --> Repair the short to ground in the (N4) Fuel Level Signal circuit.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

    2. No --> Go To 4
  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?

    1. Yes --> Repair the short between the (K900) Sensor ground and the (N4) Fuel Level Signal circuit.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

    2. No --> Go To 5
    5. NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
  5. 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.

    1. Repair
      1. Replace and program the Powertrain Control Module per Service Information.
      2. Perform POWERTRAIN VERIFICATION TEST VER - 5 .
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