Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1112

3.

(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND

Turn the ignition off.

Disconnect the C2 Cluster harness connectors.

Measure the resistance between ground and the (N4) Fuel Level Signal
circuit in the Fuel Pump Module harness connector.

Is the resistance below 100 ohms?

Yes

>> Repair the short to ground in the (N4) Fuel Level Signal cir-

cuit.

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.

(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (Z210) FUEL LEVEL SENSOR GROUND CIRCUIT

Measure the resistance between the (N4) Fuel Level Signal circuit and
the (Z210) Fuel Level Sensor Ground circuit in the Fuel Pump Module
harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Repair the short between the (Z210) Fuel Level Sensor

Ground circuit and the (N4) 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 5

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ENGINE ELECTRICAL DIAGNOSTICS

LX

5.

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)

LX

ENGINE ELECTRICAL DIAGNOSTICS

9 - 473

P0463-FUEL LEVEL SENSOR 1 CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W.

9 - 474

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

(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

(N4) 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 (N4) 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.

LX

ENGINE ELECTRICAL DIAGNOSTICS

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