Nissan Sentra Service Manual: Intake manifold tuning system
INTAKE MANIFOLD TUNING SYSTEM : System Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
This system switches the length of intake air path according to the low-to-medium speed range or high speed range. Torque is increased in the low-to-medium speed range and the engine output is improved in the high speed range.
Engine speed: Low and medium speed range
Since the intake manifold tuning (IMT) valve is closed when the engine speed is less than 5,250 rpm, the length of the effective intake air path is from the mouth of intake manifold collector to the intake valve. This long path brings the inertia effect of intake air, contributing to the improvement in intake air efficiency and the generation of high torque.
Engine speed: High speed range
When engine speed is 5,250 rpm or more, ECM turns ON the intake manifold tuning valve motor to open the intake manifold tuning valve. The length of the effective intake air path at this time is from the intake manifold tuning valve to the intake valve. This short path brings the inertia effect of intake air in the high speed range, contributing to the torque improvement while the engine is running at high speeds. (The highest engine output is improved.)
Intake Manifold Tuning Valve Operating Condition
ECM opens the intake manifold tuning valve when all of the following conditions are satisfied.
- Engine speed: 5,250 rpm or more
- Engine coolant temperature: -30В°C (-22В°F) or more
- Battery voltage: between 11 V and 16 V
Intake manifold runner control
INTAKE MANIFOLD RUNNER CONTROL : System
Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
Intake manifold runner control valve has a valve portion in the intake
passage of each cylinder.
Whil ...
Engine protection control at low engine
oil pressure
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System Description
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
Engi ...
Other materials:
Front wiper arm
Exploded View
Wiper blade (RH)
Wiper arm (RH)
Wiper drive assembly
Wiper arm (LH)
Wiper blade (LH)
Removal and Installation
REMOVAL
Remove the wiper arm cap.
Remove the wiper arm nut.
Raise the wiper arm, then remove the wiper arm.
INSTALLATION
Clean the wiper arm ...
Rear-facing child restraint installation using LATCH
Refer to all Warnings and Cautions in the “Child
safety” and “Child restraints” sections before installing
a child restraint.
NISSAN does not recommend the use of the
lower anchors if the combined weight of the child
and the child restraint exceeds 65 lbs (29.5 kg). If
the combined w ...
Seat belt maintenance
To clean the seat belt webbing, apply a
mild soap solution or any solution recommended
for cleaning upholstery or carpet.
Then wipe with a cloth and allow the seat
belts to dry in the shade. Do not allow the
seat belts to retract until they are completely
dry.
If dirt builds up in t ...
