Jeep Liberty KJ. Manual — part 724
5.
FUEL LEVEL SENSOR
Turn the ignition on.
With the scan tool, 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 discon-
nected.
Connect a jumper wire across the Fuel Level Sensor Signal circuit and Sensor Ground circuit at the Fuel Pump
Module harness connector.
With the scan tool, 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 Pump Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Replace and program the Body Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
9 - 954
ENGINE DIESEL DIAG
KJ
P0460-FUEL LEVEL SENSOR CIRCUIT SIGNAL VOLTAGE TOO LOW
For a complete wiring diagram Refer to Section 8W
KJ
ENGINE DIESEL DIAG
9 - 955
•
When Monitored:
With the ignition on.
•
Set Condition:
The Fuel Level Sensor signal voltage is below 0.19 volt for 1.0 second.
Possible Causes
INTERMITTENT CONDITION
FUEL PUMP MODULE
(K304) FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
FUEL LEVEL SENSOR SIGNAL AND GROUND CIRCUIT SHORTED TOGETHER
BODY CONTROL MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions
under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the
DTC is displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may
assist when checking for an active DTC.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read ECM DTCs.
Did this DTC set again?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.
FUEL LEVEL SENSOR
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
Turn the ignition on.
With the scan tool, read the Fuel Level Sensor voltage.
Is the voltage above 4.8 volts?
Yes
>> Replace the Fuel Level Sensor in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Go To 3
9 - 956
ENGINE DIESEL DIAG
KJ
3.
(K304) FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the BCM harness connectors.
Disconnect the Fuel Pump Module harness connector.
Measure the resistance between ground and the (K304) Fuel Level Sensor Signal circuit at the Fuel Pump Module
connector.
Is the resistance above 1000 ohms?
Yes
>> Go To 4
No
>> Repair the (K304) Fuel Level Sensor Signal circuit for a short to ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
4.
(K304) FUEL LEVEL SENSOR SIGNAL AND (K300) GROUND CIRCUIT SHORTED TOGETHER
Measure the resistance between the (K304) Fuel Level Sensor Signal
circuit and (K300) Sensor Ground circuit.
Is the resistance above 1000 ohms?
Yes
>> Replace and program the Body Control Module in accor-
dance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
No
>> Repair the (K304) Fuel Level Sensor Signal and (K300)
Ground circuit for a short together.
Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
KJ
ENGINE DIESEL DIAG
9 - 957
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст