Dodge Dakota (R1). Manual — part 133
Symptom:
P0462-FUEL LEVEL SENDING UNIT VOLTS TOO LOW
When Monitored and Set Condition:
P0462-FUEL LEVEL SENDING UNIT VOLTS TOO LOW
When Monitored:
With the ignition on.
Set Condition:
The fuel level sensor signal voltage on PCM cavity C3-26 is below 0.25
volt.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FUEL LEVEL SENSOR
FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
FUEL LEVEL SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER
POWERTRAIN CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, erase PCM DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the DRB, read PCM DTCs.
Did this DTC reset?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
Turn the ignition on.
With the DRB, read the Fuel Level Sensor voltage.
Is the voltage above 9.0 volts?
All
Yes
→
Replace the Fuel Level Sensor in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
3
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Fuel Level Sensor harness connector.
Measure the resistance between ground and the Fuel Level Sensor Signal circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the Fuel Level Sensor Signal circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
67
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Fuel Level Sensor harness connector.
Measure the resistance between the Fuel Level Sensor Signal circuit and Sensor
Ground circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the Fuel Level Sensor Signal and Ground circuits for a
short together.
Perform ROAD TEST VERIFICATION - VER-2.
5
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
6
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
68
DRIVEABILITY - DIESEL
P0462-FUEL LEVEL SENDING UNIT VOLTS TOO LOW —
Continued
Symptom:
P0463-FUEL LEVEL SENDING UNIT VOLTS TOO HIGH
When Monitored and Set Condition:
P0463-FUEL LEVEL SENDING UNIT VOLTS TOO HIGH
When Monitored:
With the ignition on.
Set Condition:
The fuel level sensor signal voltage on PCM cavity C3-26 is above 9.50
volts.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
FUEL LEVEL SENSOR SIGNAL CIRCUIT OPEN
FUEL LEVEL SENSOR GROUND CIRCUIT OPEN
FUEL LEVEL SENSOR
POWERTRAIN CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, erase PCM DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the DRB, read PCM DTCs.
Did this DTC reset?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Fuel Level Sensor harness connector.
Turn the ignition on.
Measure the voltage on the Fuel Level Sensor Signal circuit.
Is the voltage below 0.5 volt?
All
Yes
→
No
→
Repair the Fuel Level Sensor Signal circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
3
Turn the ignition off.
Disconnect the PCM 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?
All
Yes
→
No
→
Repair the Fuel Level Sensor Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
69
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the PCM 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?
All
Yes
→
No
→
Repair the Fuel Level Sensor Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
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 10.0 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?
All
Yes
→
Replace the Fuel Level Sensor in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
6
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
7
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
70
DRIVEABILITY - DIESEL
P0463-FUEL LEVEL SENDING UNIT VOLTS TOO HIGH —
Continued
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