If only a small amount of fuel is in the fuel tank it takes longer for the EVAP pressure to stabilize

Operation A: Atmospheric Pressure Measurement

Purge VSV: OFF\

Operation B, E:

Reference Pressure Measurement

- Canister

Canister Pressure Sensor

Vent Valve: OFF (vent) Canister Pump Module

-Canister Filter

Leak Detection Pump: OFF

OFF (vent)

Operation C: EVAP System Pressure Measurement

ON (closed)

Reference Orifice (0.02 inch)

Operation D: Purge VSV Monitor

c

\

Atmospheric Pressure

Negative Pressure

V

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

Get My Free Ebook


Post a comment