EVAPORATIVE EMISSION SYSTEM : System Description
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
Sensor | Input signal to ECM | ECM function | Actuator | |
Crankshaft position sensor (POS) | Engine speed* | 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 | |||
Air fuel ratio (A/F) sensor 1 | Density of oxygen in exhaust gas (Mixture ratio feedback signal) | |||
Throttle position sensor | Throttle position | |||
Accelerator pedal position sensor | Accelerator pedal position | |||
Battery | Battery voltage* | |||
Combination meter | CAN communication | Vehicle speed signal |
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
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.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and idling.
Wiring diagram
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Inside mirror
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Manual air conditioning system
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P1651 Starter motor relay
Description
ECM controls ON/OFF state of the starter relay, according to the engine and
vehicle condition. ECM transmits
a control signal to IPDM E/R by CAN communication.
Under normal conditions, ECM controls and maintains the starter relay in OFF
state during following condition:
Engi ...