Jeep Liberty KJ. Manual — part 686
4.
FUEL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND
Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between the Fuel Pressure Sensor Ground cir-
cuit and the Fuel Pressure Sensor Signal circuit.
Is the resistance above 1000 ohms?
Yes
>> Go To 5
No
>> Repair the Fuel Pressure Sensor Signal circuit for a short to
the Fuel Pressure Sensor Ground circuit.
Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
5.
ECM - SHORT TO GROUND
If there are no possible causes remaining, view repair.
Repair
Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
9 - 802
ENGINE DIESEL DIAG
KJ
P0191-FUEL PRESS SENSOR AFTERRUN NEGATIVE PLAUSIBILITY
For a complete wiring diagram Refer to Section 8W
KJ
ENGINE DIESEL DIAG
9 - 803
•
When Monitored:
At ignition shut off during Afterrun.
•
Set Condition:
The Fuel Pressure Sensor signal is below 0.298 volt for 1.0 second.
Possible Causes
FUEL PRESSURE SENSOR
INTERMITTENT CONDITION
Diagnostic Test
1.
FUEL PRESSURE SENSOR
NOTE: This code can be caused by an intermittent problem in the wiring and connectors to the Fuel Pres-
sure Sensor. Inspect the Fuel Pressure Sensor harness connector and associated wiring for signs of poor
terminal contact.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle.
With the scan tool, read the ECM DTCs.
Did this DTC set again?
Yes
>> Replace the Fuel Pressure Sensor in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
9 - 804
ENGINE DIESEL DIAG
KJ
P0191-FUEL PRESS SENSOR AFTERRUN POSITIVE PLAUSIBILITY
For a complete wiring diagram Refer to Section 8W
KJ
ENGINE DIESEL DIAG
9 - 805
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст