P0091-FUEL QUANTITY SOLENOID SHORT TO GROUND

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on and the ECM Fuel Quantity Solenoid command off.
Set Condition:
The ECM detects an open in the Fuel Quantity Solenoid circuit.

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

Did this DTC set again?

Yes

Go To2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

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

Go To3

3.FUEL QUANTITY SOLENOID CIRCUIT(S) OPEN

Is the resistance below 10.0 ohms for each measurement?

Yes

Go To4

Repair the circuit(s) that measured above 10.0 ohms for an open.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

4.FUEL QUANTITY SOLENOID

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

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

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

Yes

Replace the Fuel Quantity Solenoid in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

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).