Nissan Sentra Service Manual: Evaporative emission system
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.
Starter motor drive control
STARTER MOTOR DRIVE CONTROL : System Description
SYSTEN DIAGRAM
*1: CVT models
*2: M/T models
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
...
Automatic speed control device (ASCD)
AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description
SYSTEM DIAGRAM
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) all ...
Other materials:
Checking engine coolant level
Check the coolant level in the reservoir when
the engine is cold. If the coolant level is below
the MIN level B , add coolant to the MAX level
A . If the reservoir is empty, check the coolant
level in the radiator when the engine is cold. If
there is insufficient coolant in the radiator, fi ...
Symptom diagnosis
Audio system
Symptom table
Related to audio
Related to hands-free phone
Before performing diagnosis, confirm that the cellular phone being used
by the customer is compatible with
the vehicle.
It is possible that a malfunction is occurring due to a version change
of the phone ...
Text messaging
WARNING
Laws in some jurisdictions may restrict
the use of some of the applications and
features, such as social networking and
texting. Check local regulations for any
requirements.
Laws in some jurisdictions may restrict
the use of “Text-to-Speech”. Check loc ...
