2007 Liberty KJ Factory Service Manual 9 - ENGINE

P0092-FUEL QUANTITY SOLENOID SHORT CIRCUIT





For a complete wiring diagram Refer to Section 8W



Possible Causes
 
FUEL QUANTITY SOLENOID CIRCUIT(S) SHORTED TO GROUND
 
FUEL QUANTITY SOLENOID CIRCUIT(S) SHORTED TO VOLTAGE
 
FUEL QUANTITY SOLENOID CIRCUIT(S) SHORTED TOGETHER
 
FUEL QUANTITY SOLENOID OPEN CIRCUIT(S)
 
FUEL QUANTITY SOLENOID
 
ENGINE CONTROL MODULE
 




Diagnostic Test

1. VERIFY CURRENT DTC

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


No

2. CHECKING FOR OTHER DTCS

NOTE: An open ASD power supply to the ECM will cause multiple DTC's including this DTC to set.


NOTE: Check the ECM for other DTC's. If other DTC's are set with this DTC refer to the symptom list and perform the CHECKING THE ECM POWER AND GROUND CIRCUITS test before continuing.



If the ECM power and ground circuits are functioning properly continue with this test.

Yes

3. FUEL QUANTITY SOLENOID CIRCUIT(S) OPEN



Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Quantity Solenoid harness connector.
Measure the resistance of each of the Fuel Quantity Solenoid circuits between the ECM harness connector and the Fuel Quantity Solenoid harness connector.

Is the resistance below 10.0 ohms for each measurement?

Yes


No

4. FUEL QUANTITY SOLENOID



Connect the Engine Control Module (ECM) harness connectors.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Monitor the scan tool for ECM DTCs.

NOTE: The scan tool should display P0090 FUEL QUANTITY SOLENOID OPEN CIRCUIT.


Turn the ignition off.
Connect a jumper wire between cavity 1 and cavity 2 of the Fuel Quantity Solenoid harness connector.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Monitor the scan tool for ECM DTCs.

NOTE: The scan tool should display P0092-FUEL QUANTITY SOLENOID SHORT CIRCUIT.



Does the scan tool display the appropriate DTC for each condition?

Yes


No