oil pressure TOYOTA PRIUS 2001 Service User Guide

ENGINE ± 1NZ-FXE ENGINE
182EG22
Circuit
Opening
Relay
VSV
(for
EVAP)
Intake
Air Temp.
SensorThrottle
Position
Sensor
ECMHV
ECU
Accelera-
tor Pedal
Position
Sensor
Cooling
Fan Relay
Throttle
Control
Motor
Igniter
Camshaft Position Sensor
Knock
Sensor
Mass Air
Flow Meter
VSV
(for Toyota
HCAC
System)Vacuum
Sensor
(for Toyota
HCAC
System)
Crankshaft
Position Sensor Injector
Camshaft
Timing
Oil Con-
trol Valve
Engine
Coolant
Te m p .
Sensor
TWC
Heated Oxygen
Sensor (Bank 1,
Sensor 1)
Heated Oxygen
Sensor (Bank 1,
Sensor 2)
Actuator (for HC
Adsorber)
TWC (with HC
Adsorber)
VSV (for Purge Flow
Switching Valve)
Vapor Pressure Sensor
VSV (for Canister Closed Valve)
Charcoal
Canister
Fuel Pump65
3. Engine Control System Diagram

ENGINE ± 1NZ-FXE ENGINE
182EG23
VSV (for TOYOTA
HCAC System)VSV (for EVAP)Oil Control Valve
ECMIgnition Coil
with IgniterVSV (for Purge Flow Switching Valve)
Charcoal Canister
Vapor
Pressure
Sensor
Trap Filter
VSV (for Canister
Closed Valve) DLC 3
Heated Oxygen Sensor
(Bank 1, Sensor 2)
Heated Oxygen Sensor
(Bank 1, Sensor 1) Engien Coolant
Temp. Sensor Camshaft
Position
Sensor
Injector Crankshaft
Position
Sensor Knock
Sensor Throttle
Control
Motor Mass Air
Flow Meter 66
4. Layout of Components

ENGINE ± 1NZ-FXE ENGINE
182EG40
Vane (Fixed on Intake Camshaft)
Intake
Camshaft
Housing
165EG34
To VVT-i Controller
(Advanced Side) (Retard Side)
SleeveSpool Valve
Spring
Drain
Oil
PressureDrain
CoilPlunger 68
Construction
1) VVT-i Controller
This controller consists of the housing driven from the timing chain and the vane coupled with the intake
camshaft.
The oil pressure sent from the advance or retard side path at the intake camshaft causes rotation in the
VVT-i controller vane circumferential direction to vary the intake valve timing continuously.
2) Camshaft Timing Oil Control Valve
The camshaft timing oil control valve controls
the spool valve position in accordance with
the duty control from the ECM thus allocating
the hydraulic pressure that is applied to the
VVT-i controller to the advance and the retard
side. When the engine is stopped, the cam-
shaft timing oil control valve is in the most re-
tarded state.

ENGINE ± 1NZ-FXE ENGINE
185EG18
VVT-i Controller Housing
Vane
Rotating DirectionECM
Oil Pressure
185EG19
Rotating Direction
Oil PressureECM69
Operation
The camshaft timing oil control valve selects the path to the VVT-i controller according to the advance, re-
tard or hold signal from the ECM. The VVT-i controller rotates the intake camshaft in the timing advance
or retard position or holds it according to the position where the oil pressure is applied.
1) Advance
When the camshaft timing oil control valve is positioned as illustrated below by the advance signal from
the ECM, the resultant oil pressure is applied to the timing advance side vane chamber to rotate the cam-
shaft in the timing advance direction.
2) Retard
When the camshaft timing oil control valve is positioned as illustrated below by the retard signal from
the ECM, the resultant oil pressure is applied to the timing retard side vane chamber to rotate the camshaft
in the timing retard direction.

ENGINE ± 1NZ-FXE ENGINE
185EG10
ECM
Oil Pressure 70
3) Hold
The ECM calculates the target timing angle according to the traveling state to perform control as de-
scribed in the previous page. After setting at the target timing, the valve timing is held by keeping the
camshaft timing oil control valve in the neutral position unless the traveling state changes.
This adjusts the valve timing at the desired target position and prevents the engine oil from running out
when it is unnecessary.

CHASSIS ± BRAKES
182CH52
Spring
for 1st
Stage
Spring
for 2nd
StageTo
ReservoirStroke
Simulator
Full Stroke
Pedal Stroke 2nd Stage
Spring
Characteristics
1st Stage +
2nd Stage
Spring
Characteristics
Master Cylinder Hydraulic Pressure From
Master
Cylinder
182CH53
From wheel Cylinder (SLR)
182CH54
11 4
4) Stroke Simulator
The stroke simulator generates a pedal stroke in accordance with the driver's pedal effort during braking.
Containing 2 types of coil springs with different spring constants, the stroke simulator provides pedal
stroke characteristics in 2 stages in relation to the master cylinder pressure.
5) Reservoir
Temporarily stores the brake fluid to absorb
the pressure when regulating the wheel cylin-
der pressure.
6) Pressure Sensors
Mounted on the brake actuator, the pressure
sensor linearly detects the pressure that is gen-
erated in the master cylinder, regulator, and
the front and rear wheel cylinders and outputs
them to brake ECU.

MA02E±02
± MAINTENANCEOUTSIDE VEHICLE
MA±1
54 Author: Date:
2001 PRIUS (RM778U)
OUTSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. TIRES
(a) Check the pressure with a gauge. If necessary, adjust.
(b) Check for cuts, damage or excessive wear.
3. WHEEL NUTS
When checking the tires, check the nuts for looseness or for missing nuts. If necessary, tighten them.
4. TIRE ROTATION
Check the owner's manual supplement in which the maintenance schedule is shown.
5. WINDSHIELD WIPER BLADES
Check for wear or cracks whenever they do not wipe clean. If necessary, replace.
6. FLUID LEAKS
Check underneath for leaking fuel, oil, water or other fluid.
7. DOORS AND ENGINE HOOD
(a) Check that all doors including the trunk lid operate smoothly, and that all latches lock securely.
(b) Check that the engine hood secondary latch secures the hood from opening when the primary latch
is released.

PP3AX±02
PP±8
± PREPARATIONSFI
69 Author: Date:
2001 PRIUS (RM778U)
SFI
SST (Special Service Tools)
09268±21010Fuel Hose Puller
09268±41047Injection Measuring Tool Set
(95336±08070)Hose
09268±45014EFI Fuel Pressure Gauge
(09268±41200)Gauge
(09268±41220)Hose
(09268±41250)T Joint
09816±30010Oil Pressure Switch Socket
09842±30080EFI Inspection Wire ºHº
09843±18020Diagnosis Check Wire

PP2FK±01
PP±16
± PREPARATIONLUBRICATION
2001 PRIUS (RM778U)
EQUIPMENT
Oil pressure gauge
Torque wrench
Feeler gauge
Straight edge

PP2FM±02
PP±18
± PREPARATIONLUBRICATION
2001 PRIUS (RM778U)
SSM (Special Service Materials)
08833±00080Adhesive 1344
THREE BOND 1344
LOCTITE 242 or equivalentOil pressure switch