Diagnostic Aids

WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test when instructed during QUICK TEST or another SYSTEM TEST. This test is used to diagnose the following:

Evaporative Emission (EVAP) vent control valve.
EVAP pressure sensor.
EVAP purge control solenoid valve.
EVAP vacuum cut by-pass solenoid.
EVAP circuits.
EVAP canister.
Fuel filler cap.
Fuel temperature sensor.
PCM.

EVAP SYSTEM CIRCUIT IDENTIFICATION

Circuit	PCM Terminal No.	Wire Color
EVAP	5	Green/Black
EVAP CVC	88	Light Green/Black
EVAP PS	62	Red
EVAP VC	100	Blue/Green
Fuel Temperature Sensor	60	Red/Yellow

Fig 1: Identifying EVAP Canister Purge Valve Circuits & Harness Connector

Courtesy of FORD MOTOR CO.

Fig 2: Identifying EVAP Canister Vent Control Solenoid Circuits & Harness Connector Terminals

Courtesy of FORD MOTOR CO.

Fig 3: Identifying EVAP System Pressure Sensor Circuits & Connector Terminals

Courtesy of FORD MOTOR CO.

Fig 4: Identifying EVAP Vacuum Cut By-Pass Solenoid Circuits & Connector Terminals

Courtesy of FORD MOTOR CO.

Fig 5: Identifying EVAP Vacuum Cut Valve Ports

Courtesy of FORD MOTOR CO.