Pinpoint Test D : Pinpoint Test

WARNING: This page is about a different variant/trim than selected.

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

D1 CHECK THE COOLANT BYPASS SOLENOID VALVE CONNECTOR FOR BEING FULLY SEATED
- Check the coolant bypass solenoid valve C1918 for being fully seated.
Were any concerns found?

Yes REPAIR as needed.

No GO to D2

D2 CHECK THE COOLANT BYPASS SOLENOID VALVE RESISTANCE

Disconnect coolant bypass solenoid valve C1918 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
pin 1 (component side)	Courtesy of FORD MOTOR COMPANY	pin 2 (component side)

Is the resistance between 9-12 ohms?

Yes

GO to D3

No	INSTALL a new coolant bypass solenoid valve. Refer to: Coolant Bypass Solenoid Valve .

D3 CHECK FOR VOLTAGE TO THE COOLANT BYPASS SOLENOID VALVE

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1918-2	Courtesy of FORD MOTOR COMPANY	Ground

Is voltage greater than 11 volts?

Yes

GO to D4

No	VERIFY the BJB fuse 24 (10A) is OK. If the fuse is OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

D4 CHECK THE COOLANT BYPASS SOLENOID VALVE CIRCUIT FOR A SHORT TO POWER

Ignition OFF.

Disconnect PCM C1915E .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1918-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to D5

D5 CHECK THE COOLANT BYPASS SOLENOID VALVE CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1918-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the greater than 10, 000 ohms?

Yes

GO to D6

No	REPAIR the circuit.

D6 CHECK THE COOLANT BYPASS SOLENOID VALVE CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1918-1	Courtesy of FORD MOTOR COMPANY	C1915E-2

Is the resistance less than 3 ohms?

Yes	INSTALL a new coolant bypass solenoid valve. Refer to: Coolant Bypass Solenoid Valve . CLEAR the DTC. TEST the system for normal operation. If the DTC is still present GO to D7

GO to D7

D7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all the PCM connectors.

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 connectors. Make sure they seat and latch correctly.

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

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no Technical Service Bulletins (TSBs) 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.