PINPOINT TEST HX: Evaporative Emission (EVAP) Monitor and System: Introduction

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: This vehicle is equipped with high voltage cables, components, and wiring. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables and wiring are orange in color. Certified rubber insulating gloves and a face shield must be worn when working with the high voltage cables, components, or wiring. The ignition key must be cycled to the OFF position for a minimum of 5 minutes, and the high voltage traction battery service disconnect plug placed in the servicing/shipping position before disconnecting the high voltage cables. Failure to follow these instructions may result in personal injury or death.

Do not disconnect, disable, or touch the high voltage cables, components, or wiring during the module reprogramming procedure because high voltage is present. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables and wiring are orange in color. Failure to follow these instructions may result in personal injury or death.

Appropriate repair methods and procedures are essential for the safe, reliable operation of all motor vehicles, as well as the personal safety of the individual doing the work. This article provides general directions for repairing vehicles with tested, effective techniques. Following them helps to establish reliability. There are numerous variations in procedures, techniques, tools, and parts for repairing vehicles, as well as in the skill of the individual doing the work. This article cannot possibly anticipate all such variations and provide advice or cautions as to each. Accordingly, anyone who departs from the instructions provided in this article must first establish that they compromise neither their personal safety nor the vehicle integrity by their choice of methods, tools, or parts.

NOTE: Enter this pinpoint test only when directed here.

The use of a soap solution around the fuel filler cap or the use of the hydrocarbon emission analyzer to determine an evaporative emission system leak is not recommended. The mandatory Rotunda Evaporative Emission System Leak Tester for OBD II (including the ultrasonic tester) and the Rotunda Vacutec 522 Leak Detector Smoke Machine are the only devices to be used at this time for evaporative emission system leak detection.

This pinpoint test is intended to diagnose the following:

canister vent (CV) solenoid (9F945)
fuel filler cap (9030)
fuel tank pressure (FTP) sensor (9C052)
EVAP canister purge (EVAPCP) valve (9C915). Also known as the vapor management valve (VMV).
fuel tank isolation valve (FTIV) (9G712)
EVAP system leaks using the Rotunda Vacutec Leak Detector Smoke Machine.
harness circuits: CV, EVAPCP, FTP, FTIV, SIGRTN, VPWR, VREF, and PWRGND
powertrain control module (PCM) (12A650)

Fig 1: Canister Vent (CV) Solenoid Connector

Pin	Circuit
1	VPWR (Vehicle Power)
2	CANV (Canister Vent Solenoid)

Fig 2: EVAP Canister Purge (EVAPCP) Valve Connector

Pin	Circuit
2	EVAPCP (EVAP Canister Purge)
1	VPWR (Vehicle Power)

Fig 3: Fuel Tank Pressure (FTP) Sensor Connector

Pin	Circuit
3	FTP (Fuel Tank Pressure)
2	SIGRTN (Signal Return)
1	VREF (Reference Voltage)

Fig 4: Fuel Tank Isolation Valve (FTIV) Solenoid Connector

Pin	Circuit
2	FTIV (Fuel Tank Isolation Valve)
1	VPWR (Vehicle Power)

Fig 5: Identifying 150 Pin PCM Harness Connectors/Terminals

Pin	Circuit
B29	FTIV (Fuel Tank Isolation Valve)
B13	CANV (Canister Vent Solenoid)
B9	FTP (Fuel Tank Pressure)
B41	SIGRTN (Signal Return)
B40	VREF (Reference Voltage)
B34	EVAPCP (EVAP Canister Purge)