2006 DODGE RAM SRT-10 sensor

4.INSIDE OF FUEL TANK OBSTRUCTED DAMAGED
Visually inspect the inside of the fuel tank for obstructions.
Is the inside of the fuel tank damaged or obstructing the fuel level sensor?
Ye s>>
Te s t C o m p l e t e .
No>>
Replace the fuel tank.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

P0462-LOW VOLTAGE DETECTED AT THE FUEL LEVEL SENSOR
For a complete wiring diagramRefer to Section 8W.

When Monitored:
Ignition on and battery voltage above 10.4 volts.
Set Condition:
The signal voltage from the sensor falls below a calibrated value for a calibrated amount of time.
Possible Causes
FUEL LEVEL SENSOR
(N4) SIGNAL CIRCUIT OPEN
(N4) SIGNAL CIRCUIT SHORTED TO VOLTAGE
INTERMITTENT CONDITION
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.FUEL LEVEL SENSOR
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the sensor across the (N4) signal circuit and (K900) return circuit.
Is the resistance less than 10 ohms?
Ye s>>
Go To 2
No>>
Replace the fuel level sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

2.(G8) SIGNAL CIRCUIT OPEN
Disconnect the ECM harness connectors.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the (N4) signal circuit between the ECM har-
ness connector and the sensor harness connector.
Is the resistance less than 10 ohms?
Ye s>>
Go To 3
No>>
Repair the open (N4) signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
3.(G8) SIGNAL CIRCUIT SHORTED TO VOLTAGE
Measure the voltage between the (N4) signal circuit and battery nega-
tive.
Is the voltage greater than 1 volt?
Ye s>>
Repair the (N4) signal circuit shorted to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No>>
Go To 4

4.ECM
Reconnect the ECM harness connector.
While monitoring with the scan tool, connect a jumper wire between the
(N4) signal circuit in the sensor harness connector and battery negative.
Did the DTC P0463 set?
Ye s>>
Te s t C o m p l e t e .
No>>
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

P0463-HIGH VOLTAGE DETECTED AT THE FUEL LEVEL SENSOR
For a complete wiring diagramRefer to Section 8W.

When Monitored:
Ignition on and battery voltage above 10.4 volts.
Set Condition:
The signal voltage from the sensor goes above a calibrated value for a calibrated amount of time.
Possible Causes
FUEL LEVEL SENSOR
(N4) SIGNAL CIRCUIT SHORTED TO GROUND
INTERMITTENT CONDITION
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.FUEL LEVEL SENSOR
Disconnect the ECM harness connectors.
Disconnect the Fuel level sensor harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the Fuel level sensor across the (N4) signal circuit and (K900) return circuit.
Is the resistance less than 10 ohms?
Ye s>>
Go To 2
No>>
Replace the Fuel level sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
2.(N4) SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between the (N4) signal circuit in the sensor
harness connector and battery negative.
Is the resistance less than 10 Ohms?
Ye s>>
Repair the (N4) signal circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No>>
Go To 3

3.ECM
Reconnect the ECM harness connector.
While monitoring with the scan tool, disconnect the Fuel level sensor harness connector.
Did the DTC P0462 set?
Ye s>>
Te s t C o m p l e t e .
No>>
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)