P1486 EVAP Leak Monitor Pinched Hose Found
NAME OF CODEEvap Leak Monitor Pinched Hose found
WHEN MONITORED
See DRB III
SET CONDITION
See DRB III
THEORY OF OPERATION
After passing the leak detection phase of the test, system pressure is maintained until the purge system is actuated, in effect creating a leak. If the cycle rate increases due to flow of the purge system, the test is passed and the diagnostic test is complete. If not, there is an obstruction in the system. The purpose of the evaporative system is to recycle the accumulated fuel vapor bound in the fuel tank. The fuel vapor is temporarily held in the evap canister and is recirculated via the evap solenoid through the air intake system and consumed during combustion. The evaporative system consists of the fuel tank, vapor flow control orifice, evap solenoid, and evap canister connected by a series of hoses and connectors.
POSSIBLE CAUSES
- Rubber hose(s) kinked from solenoid to throttle body
- Hose plugged from solenoid to canister
- Hose plugged from throttle body to solenoid
- Hose plugged from tank to canister
SAFETY PRECAUTIONS
WARNING: Take the following precautions to prevent personal injury while using this test equipment
Keep lighted cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the tent area well-ventilated.
Thin equipments designed to be used on the vehicle evaporative system only. Using the equipment in a manner for which it was not designed could be a dangerous procedure.
The vehicle fuel tank must be between a gallons and 17 gallons of gas when conducting this test procedure. Pressurizing a tank containing less than three gallons of gas could result in the ignition of fumes, causing an explosion.
Wear protective eyewear that meets the requirements of OSHA and ANSI Z87.1-1968.
When using the battery ass power source, connect the RED(+) battery clip to the positive vehicle battery terminal, and connect the BLACK(+) battery clip to a good ground away from the battery.
If the vehicle being tested is not on a hoist, set the parking brake and block the wheels before starting the test