Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1172
P2068-FUEL LEVEL SENSOR 2 CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
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ENGINE ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
Ignition on and battery voltage above 10.4 volts.
•
Set Condition:
The fuel level sensor signal voltage at the PCM goes above 4.9 volts for more than 90 seconds. One Trip
Fault. Three good trips to turn off the MIL.
Possible Causes
(N5) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(N5) FUEL LEVEL SIGNAL CIRCUIT OPEN
(Z210) FUEL LEVEL SENSOR GROUND CIRCUIT OPEN
FUEL LEVEL SENSOR
INSTRUMENT CLUSTER
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
FUEL LEVEL SENSOR VOLTS ABOVE 4.9 VOLTS
NOTE: Diagnose any CAN - B and CAN - C Communication DTCs before continuing.
Ignition on, engine not running.
With a scan tool, read the Fuel Level Sensor voltage.
Is the Fuel Level Sensor voltage above 4.9 volts?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
2.
FUEL LEVEL SENSOR
Turn the ignition off.
Disconnect the Fuel Pump Module electrical harness connector.
Ignition on, engine not running.
Connect a jumper wire between the (N5) Fuel Level Signal circuit and
the (Z210) Fuel Level Sensor Ground circuit in the Fuel Pump Module
harness connector.
With the scan tool, read the Fuel Level Sensor voltage.
Did the Fuel Level Sensor voltage change from above 4.8 volts
to below 0.4 of a volt with the jumper wire installed?
Yes
>> Replace the Fuel Level Sensor.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
No
>> Go To 3
NOTE: Remove the jumper wire before continuing.
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ENGINE ELECTRICAL DIAGNOSTICS
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3.
(N5) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the C2 Cluster harness connector.
Ignition on, engine not running.
Measure the voltage on the (N5) Fuel Level Signal circuit in the Fuel
Pump Module harness connector.
Is the voltage above 5.2 volts?
Yes
>> Repair the short to battery voltage in the (N5) Fuel Level
Signal circuit.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
No
>> Go To 4
4.
(N5) FUEL LEVEL SIGNAL CIRCUIT OPEN
Turn the ignition off.
Measure the resistance of the (N5) Fuel Level Signal circuit from the
Fuel Pump Module harness connector to the C2 Cluster harness con-
nector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 5
No
>> Repair the open in the (N5) Fuel Level Signal circuit.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
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ENGINE ELECTRICAL DIAGNOSTICS
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5.
(Z210) FUEL LEVEL SENSOR GROUND CIRCUIT OPEN
Measure the resistance of the (Z210) Fuel Level Sensor Ground circuit
from the Fuel Pump Module harness connector to the C2 Cluster har-
ness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 6
No
>> Repair the open in the (Z210) Fuel Level Sensor Ground
circuit.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
6.
INSTRUMENT CLUSTER
NOTE: Before continuing, check the Instrument Cluster 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.
Were there any problems found?
Yes
>> Repair as necessary.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Replace and program the Instrument Cluster per Service Information.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS
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