Jeep Liberty KJ. Manual — part 683
P0180-FUEL TEMPERATURE SENSOR SIGNAL VOLTAGE TOO LOW
For a complete wiring diagram Refer to Section 8W
9 - 790
ENGINE DIESEL DIAG
KJ
•
When Monitored:
With the ignition on.
•
Set Condition:
The Fuel Temperature Sensor signal is below 0.12 volt for 0.5 seconds.
Possible Causes
INTERMITTENT CONDITION
FUEL TEMPERATURE SENSOR
FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
FUEL TEMPERATURE SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER
ENGINE 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, monitor the Fuel Temperature Sensor voltage.
Is the Fuel Temperature Sensor voltage below 0.20 volt?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.
FUEL TEMPERATURE SENSOR
Turn the ignition off.
Disconnect the Fuel Temperature Sensor harness connector.
Turn the ignition on.
With the scan tool, read the Fuel Temperature Sensor voltage.
Is the voltage above 4.0 volts?
Yes
>> Replace the Fuel Temperature Sensor in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> 3
KJ
ENGINE DIESEL DIAG
9 - 791
3.
FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Temperature Sensor harness connector.
Measure the resistance between ground and the Fuel temperature Sen-
sor Signal circuit.
Is the resistance above 1000 ohms?
Yes
>> Go To 4
No
>> Repair the Fuel Temperature Sensor Signal circuit for a
short to ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
4.
FUEL TEMPERATURE SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Temperature Sensor harness connector.
Measure the resistance between the Fuel Temperature Sensor Signal
circuit and Sensor Ground circuit.
Is the resistance above 1000 ohms?
Yes
>> Replace and program the Engine 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 Fuel Temperature Sensor Signal and Ground cir-
cuits for a short together.
Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
9 - 792
ENGINE DIESEL DIAG
KJ
P0190-FUEL PRESS SENSOR SIGNAL VOLTAGE TOO HIGH
For a complete wiring diagram Refer to Section 8W
KJ
ENGINE DIESEL DIAG
9 - 793
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст