Pinpoint Test HX: Evaporative Emission (EVAP) System And Monitor: Introduction

Using a soap solution around the fuel filler cap or capless fuel tank filler pipe (if equipped) or using the hydrocarbon emission analyzer to determine an evaporative emission system leak is not recommended.

When using the Evaporative Emission Leak Detector With On Board Nitrogen Generator 218-522C or equivalent, the fuel level in the fuel tank must be less than 85% full.

This pinpoint test is intended to diagnose the following:

• EVAP canister vent valve (9F945)
• fuel filler cap (9030)
• capless fuel tank filler pipe (9034)
• fuel tank pressure (FTP) sensor (9C052)
• EVAP purge valve (9C915)
• EVAP check valve
• EVAP ejector
• EVAP vapor blocking valve
• EVAP system leaks using the Evaporative Emission Leak Detector With On Board Nitrogen Generator 218-522C or equivalent
• harness circuits: B+, CANV, EVAPCP, FTP, SIGRTN, VBV, VPWR and VREF
• PCM (12A650)

For additional information on the EVAP system, refer to EVAPORATIVE EMISSION (EVAP) SYSTEMS , or the appropriate Evaporative Emissions article.

Fig 1: Evaporative Emission (EVAP) Canister Vent Valve Connector

Courtesy of FORD MOTOR CO.

For applications using the engine off natural vacuum (EONV) EVAP leak check monitor, KAPWR provides voltage to the EVAP canister vent valve instead of VPWR.

Fig 2: Evaporative Emission (EVAP) Purge Valve Connector

Courtesy of FORD MOTOR CO.

Fig 3: Evaporative Emission (EVAP) Vapor Blocking Valve Connector

Courtesy of FORD MOTOR CO.

Fig 4: Fuel Tank Pressure (FTP) Sensor Connector

Courtesy of FORD MOTOR CO.

Powertrain Control Module (PCM) Connector 

For PCM connector views or reference values, refer to REFERENCE VALUES .