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

The use of a soap solution around the fuel filler cap or capless fuel tank filler pipe (if equipped) 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 On Board Diagnostic (OBD) (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.

When using the smoke machine, the fuel level in the fuel tank must be less than 85% full.

This pinpoint test is intended to diagnose the following:

• canister vent (CV) solenoid (9F945)
• fuel filler cap (9030)
• capless fuel tank filler pipe (9034)
• fuel tank pressure (FTP) sensor (9C052)
• EVAP canister purge (EVAPCP) valve (9C915)
• EVAP system leaks using the Rotunda Vacutec Leak Detector Smoke Machine (218-00001)
• harness circuits: B+, CV, EVAPCP, FTP, FTPREF, SIGRTN, VPWR, VREF and CASE GND
• powertrain control module (PCM) (12A650)

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

For applications that use the engine off natural vacuum (EONV) EVAP leak check monitor, KAPWR provides voltage to the CV solenoid instead of VPWR.

Fig 1: Canister Vent (CV) Solenoid Connector

Courtesy of FORD MOTOR CO.

Fig 2: EVAP Canister Purge (EVAPCP) Valve Connector

Courtesy of FORD MOTOR CO.

For applications that use the engine off natural vacuum (EONV) EVAP leak check monitor, FTPREF provides voltage to the FTP sensor instead of VREF.

Fig 3: Fuel Tank Pressure (FTP) Sensor Connector

Courtesy of FORD MOTOR CO.

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