INPUT/OUTPUT SIGNAL CHART

Sensor | Input signal to ECM | ECM function | Actuator
Crankshaft position sensor (POS) | Engine speed*1 Piston position | EVAP canister purge flow control | EVAP canister purge volume control solenoid valve
Camshaft position sensor (PHASE)
Mass air flow sensor | Amount of intake air
Engine coolant temperature sensor | Engine coolant temperature
Throttle position sensor | Throttle position
Accelerator pedal position sensor | Accelerator pedal position
Air fuel ratio (A/F) sensor 1 | Density of oxygen in exhaust gas (Mixture ratio feedback signal)
Fuel tank temperature sensor | Fuel temperature in fuel tank
EVAP control system pressure sensor | Pressure in purge line
Battery | Battery voltage*1
Combination meter | Vehicle speed*2
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM via the CAN communication line.

SYSTEM DESCRIPTION
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases.
EVAPORATIVE EMISSION LINE DRAWING

1. | Intake manifold collector | 2. | EVAP service port | 3. | EVAP purge resonator
4. | EVAP canister purge volume control solenoid valve |  |  |  |
: From next figure

1. | EVAP canister | 2. | EVAP canister vent control valve | 3. | EVAP control system pressure sensor
: Vehicle front
: To previous figure

NOTE：
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.