PINPOINT TEST HG: Positive Crankcase Ventilation (PCV) System: Introduction

WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

positive crankcase ventilation (PCV) valve (6A666) and related vacuum lines
electrically heated PCV valve (6A666) and heater circuit, both PCM and non-PCM controlled
electrically heated PCV tube (9F624) and heater circuit, both PCM and non-PCM controlled
powertrain control module (PCM) (12A650)
PCV thermal extension harness (12A580)

NOTE: For the electrically heated PCV system only, refer to POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM .

Electrically Heated PCV

Fig 1: Positive Crankcase Ventilation (PCV) Connector - A

Courtesy of FORD MOTOR CO.

Fig 2: Positive Crankcase Ventilation (PCV) Connector - B

Courtesy of FORD MOTOR CO.

Fig 3: Positive Crankcase Ventilation (PCV) Connector - C

Vehicle	Connector	Pin	Circuit
Crown Victoria (PCM controlled PCV heater), E-Series 6.8L (PCM controlled PCV heater), E-Series 4.6L (PCM controlled PCV heater), Edge (PCM controlled PCV heater), Explorer 4.0L (PCM controlled PCV heater), Explorer Sport Trac 4.0L (PCM controlled PCV heater), F-150 4.2L (PCM controlled PCV heater), F-150 4.6L (PCM controlled PCV heater), Freestar/Monterey (PCM controlled PCV heater), Fusion 3.0L (PCM controlled PCV heater), Grand Marquis (PCM controlled PCV heater), Milan 3.0L (PCM controlled PCV heater), MKX (PCM controlled PCV heater), MKZ (PCM controlled PCV heater), Mountaineer 4.0L (PCM controlled PCV heater), Mustang 4.0L (PCM controlled PCV heater), Mustang 5.4L (PCM controlled PCV heater), Town Car (PCM controlled PCV heater)	A	1 2	PCVHC IGN START/RUN
Expedition (Non-PCM controlled heated PCV tube), F-150 5.4L (Non-PCM controlled heated PCV tube), Mark LT (Non-PCM controlled heated PCV tube), Navigator (Non-PCM controlled heated PCV tube)	B	2 1	GND IGN START/RUN
F-Super Duty 5.4L (PCM controlled heated PCV tube)	C	2 1	PCVHC IGN START/RUN
Taurus (PCM controlled PCV heater)	A	2 1	PCVHC IGN START/RUN
All other vehicles	A	1 2	GND IGN START/RUN

Fig 4: Positive Crankcase Ventilation Heated Fitting (PCVHF) Connector

Pin	Circuit
1	PCVHF (Positive Crankcase Ventilation Heated Fitting)
2	IGN START/RUN

Fig 5: Positive Crankcase Ventilation Thermal Extension -Harness Side (PCVTE-Harness Side)

Pin	Circuit
2	GND (Ground)
1	IGN START/RUN

Powertrain Control Module (PCM) Connector

This table is only for vehicles equipped with a PCM controlled PCV heater.

Vehicle	Connector	Pin	Circuit
E-Series, F-Super Duty	170 Pin	E2	PCVHC
Edge, MKX	190 Pin	E33 E65	PCVHC PCVHF
F-150	190 Pin	E3	PCVHC
Freestar/Monterey	104 Pin	2	PCVHC
Fusion, Milan	140 Pin	E2	PCVHC
MKZ	140 Pin	E2 E6	PCVHC PCVHF
Mustang 5.4L	170 Pin	E67	PCVHC
Taurus	104 Pin	11	PCVHC
All other vehicles	170 Pin	E3	PCVHC