DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 102

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DRIVEABILITY - DIESEL
P0460-FUEL LEVEL SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH —
Continued
TEST
3
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Level Sensor harness connector.
Measure the resistance of the Fuel Level Sensor Signal circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 4
→ Repair the Fuel Level Sensor Signal circuit for an open.
No
4
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Level Sensor harness connector.
Measure the resistance of the Fuel Level Sensor Ground circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 5
→ Repair the Fuel Level Sensor Ground circuit for an open.
No
5
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
Turn the ignition on.
With the DRB, read and record the Fuel Level Sensor voltage.
NOTE: The Fuel Level Sensor voltage should be 5.0 ± 0.3 volts with the
sensor harness connector disconnected.
Connect a jumper wire between Fuel Level Sensor harness connector cavities 3 and
4.
With the DRB, read the Fuel Level Sensor voltage.
NOTE: The Fuel Level Sensor voltage should be less then 1.0 volt with the
jumper wire connected.
Are the voltage readings the expected voltages?
Yes → Replace the Fuel Level Sensor in accordance with the Service
→ Go To 6
No
6
If there are no possible causes remaining, view repair.
Repair
ACTION
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
Information.
Perform ROAD TEST VERIFICATION - VER-2.
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
94
APPLICABILITY
All
All
All
All

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