Pinpoint Test Hg: Positive Crankcase Ventilation (PCV) System: Introduction

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. 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 .

Fig 1: Positive Crankcase Ventilation (PCV) Connector (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: Positive Crankcase Ventilation (PCV) Connector (2 Of 2)

Courtesy of FORD MOTOR CO.

Fig 3: Positive Crankcase Ventilation Heated Fitting (PCVHF) Connector

Courtesy of FORD MOTOR CO.

Fig 4: Positive Crankcase Ventilation Thermal Extension - Harness Side (PCVTE-Harness Side)

Courtesy of FORD MOTOR CO.

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

POWERTRAIN CONTROL MODULE (PCM) CONNECTOR

Vehicle	Connector	Pin	Circuit
E-Series 4.6L, F-150 2V 4.6L	190-Pin	E6 E7	PCVHC PCVHF
E-Series 6.8L, F-Super Duty	170 Pin	E2	PCVHC
Escape/Mariner	190-Pin	E6	PCVHC
Expedition, F-150 3V 4.6L, F-150 5.4L, Navigator	190-Pin	E7	PCVHF
Fusion, Milan	140 Pin	E2	PCVHC
Mustang 5.4L	170 Pin	E67	PCVHC
All other vehicles	170 Pin	E3	PCVHC