Pinpoint Test Q: Engine Mount Control Solenoid Faults

Refer to ELECTRONIC ENGINE CONTROLS - 3.0L GTDI for schematic and connector information.

Normal Operation and Fault Conditions

The engine mound control solenoid allows vacuum to be applied to the engine mounts at idle. If the system malfunctions a rougher than expected idle will occur. The MIL will not be illuminated.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0A14:00	Engine Mount Control "A" Circuit/Open: No Sub Type Information	The PCM sets this DTC if it senses greater than expected voltage on the control circuit, indicating a short to voltage or an open circuit or solenoid.
PCM P0A15:00	Engine Mount Control "A" Circuit Low: No Sub Type Information	The PCM sets this DTC if it senses lower than expected voltage on the control circuit, indicating a short to ground.
PCM P0A16:00	Engine Mount Control "A" Circuit High: No Sub Type Information	The PCM sets this DTC if it senses greater than expected voltage on the control circuit, indicating a short to voltage or an open circuit or solenoid

Possible Sources

Wiring, terminals or connectors
Engine mount control solenoid
PCM

Q1 CHECK THE ENGINE MOUNT CONTROL SOLENOID SUPPLY CIRCUIT FOR VOLTAGE

NOTE: Some vehicles are equipped with a single engine mount solenoid connector and some are equipped with dual engine mount solenoid connectors.

Ignition OFF.

Disconnect Engine mount control solenoid (vehicles with single connector) C1757 .

Disconnect Engine mount control solenoid (vehicles with dual connectors) C1459A .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1757-1	Courtesy of FORD MOTOR COMPANY	Ground
C1459A-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to Q2

No	Verify BJB fuse 14 (15A) is OK. If OK, REPAIR the circuit. If not OK, Refer to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

Q2 CHECK THE ENGINE MOUNT CONTROL SOLENOID CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect PCM C1551B .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1757-2	Courtesy of FORD MOTOR COMPANY	Ground
C1459A-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 0.5 volts?

Yes	REPAIR the circuit.

GO to Q3

Q3 CHECK THE ENGINE MOUNT CONTROL SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1757-2	Courtesy of FORD MOTOR COMPANY	Ground
C1459A-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to Q4

No	REPAIR the circuit.

Q4 CHECK THE ENGINE MOUNT CONTROL SOLENOID CONTROL CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1757-2	Courtesy of FORD MOTOR COMPANY	C1551B-18
C1459A-2	Courtesy of FORD MOTOR COMPANY	C1551B-18

Is the resistance less than 3 ohms?

Yes	INSTALL a new engine mount control solenoid. CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to Q5

No	REPAIR the circuit.

Q5 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect PCM connector.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the PCM connector. Make sure it seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new PCM. Refer to Powertrain Control Module (PCM) .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.