1. Instructors Click a Section Tab
Contents
Click a Section Tab
Engine New Model - Engine

2. Engine Overall
Fuel System
Engine Control System
Service Points

3. DIS ETCS-i VVT-i Engine Overall 1NZ-FE
Instructors
Engine Overall
1NZ-FE
In-line 4-cylinder, 1.5-liter, 16-valve DOHC gasoline engine
DIS
ETCS-i
VVT-i
[Feature of 1NZ-FE (for –A, -K, -Q, -T, -D, -E) / 2NZ-FE Engine (for –Q, –V and Gen)]
In-line 4-cylinder, 1.5 (1.3)-liter, 16-valve DOHC gasoline engine
Equipment: VVT-i, ETCS-i and DIS
DIS: Direct Ignition System; ETCS-i: Electronic Throttle Controlled System Intelligent; VVT-i: Variable Valve Timing Intelligent
Engine New Model - Engine

4. 16-valve, DOHC with VVT-i, Chain Drive
Engine Overall
Specification of 1NZ-FE Engine
Model
Vios
Engine
1NZ-FE
No. of Cylinders and Arrangement
4-cylinder, In-line
Valve Mechanism
16-valve, DOHC with VVT-i, Chain Drive
Displacement [cm3 (cu. in.)]
1,497 (91.3)
Bore x Stroke [mm (in.)]
75.0 x 84.7 (2.95 x 3.33)
Compression Ratio
10.5 : 1
Maximum Output
(kW/rpm)
6,000 (109 hp)
Maximum Torque
(N.m/rpm)
4,200 (14.4 kgf)
Oil Viscosity / Oil Grade
API SL, SM or ILSAC
Emission Regulation
EURO III

5. Cranking hold function
Instructors
Engine Overall
Major difference from previous model
Cranking hold function
ETCS-i
Spiny liner
Engine ECU (ECM) is located in engine compartment
CAN communication
[Major difference from previous model]
- ETCS-i is used for all model
- Spiny liner is used
- 6-layer plastic type fuel tank
- Cranking hold function is used for all model
- CAN communication is used for the diagnosis communication
- Engine ECU (ECM) is located in engine compartment
- Charcoal canister is integrated in fuel pump module (except –A, -K)
- Key-off pump module is used (-A, -K only)
- Iridium spark plug is used (-A, -K only)
Heated O2 Sensor:
B1 S1
B1 S2
Charcoal canister is integrated in fuel pump module
6-layer plastic fuel tank
Engine New Model - Engine

6. Engine Overall Major difference from previous model
VVT-i operation range (Intake valve opening/closing) has been change to suit vehicle characteristic
Intake Valve
Current Vios
New Vios
Yaris
Open (°, BTDC)
-7 ~ 53
-7 ~ 33
Close (°, ABDC)
52 - 8
52 ~ 12
Range (°)
241
225

7. Engine Overall
Serpentine Belt & Hydraulic Engine Mount

8. Fuel System Charcoal Canister
Instructors
Fuel System
Charcoal Canister
Charcoal canister is integrated in fuel pump module
To purge valve
Fuel Main Tube
To atmospheric
Charcoal Canister
Charcoal canister is integrated in fuel pump module (except –A, -K model)
Fuel Pump
Fuel Pump Module
Engine New Model - Engine

9. Engine Control System
Electronic Throttle Control System – Intelligent is used
Non-linear control & Idle speed control by ETCS-i
Basic operation same as Yaris engine
Previous
: Engine Number Location

10. Engine Control System
Engine ECU calculates optimal throttle opening angle that is appropriate for the respective driving condition (non-linear control)

11. Engine Control System
ECU calculates based on sensor’s signals and actuates throttle motor to open the throttle
Throttle Position Sensor
Accelerator Pedal Position Sensor
Throttle Control Motor
Engine ECU
Ignition Coil
Air Flow Meter
Fuel Injector

12. Engine Control System No-contact type throttle position sensor
Throttle Control Motor
Reduction Gears
Throttle Valve
Throttle Position Sensor
Hall ICs
Magnets

13. Engine Control System
No-contact type pedal accelerator position sensor
Magnets
Hall ICs
Accelerator Pedal Arm

14. Operates Automatically
Instructors
Engine Control System
Cranking Hold Function
Once the ignition switch is turned to “Start”, starter operates until engine starting (approx. > 600 rpm)
“Start”
“ON”
Ignition Switch
Operates Automatically
Cranking hold function is used for all model
Starter
Stop
Operates
Stop
Engine starts
A/T Model: Approx. > 500 rpm
Engine New Model - Engine

15. Engine Control System Cranking Hold Function System Diagram Engine ECU
Instructors
Engine Control System
Cranking Hold Function
System Diagram
Audio & Illumination
ACC
ACC Cut Relay ST
Ignition Switch
ACCR
Engine Coolant
Temp. Sensor
STSW
THW
STAR
Crankshaft Position Sensor NE
Neutral Start Switch (AT) or
Clutch Switch (MT)
ACC circuit is cut off while cranking to prevent the accessory illumination from operating intermittently
STA
Engine ECU
(ECM)
Starter Relay
Starter
Hints for Engine starting
A/T model: Push “Start” button + press brake pedal
M/T model: Turn IG start s/w + press clutch pedal
Engine New Model - Engine

16. Automatically Controlled
Engine Control System
Cranking Hold Function
Operation (approx. 2 ~ 25 seconds)
: With this system
Ignition Switch
Start
: Without this system ON
ACC Power ON
OFF
Automatically Controlled
Starter Relay ON
OFF
Judgment
NE Signal
Time

17. Engine Control System 2 TWC’s are used
O2 Sensors is used to detect oxygen concentration on exhaust emission
Heated O2 Sensor B1 S1
TWC’s
Heated O2 Sensor B1 S2
Previous

18. Engine Control System Communication
Instructors
Engine Control System
Communication
CAN Communication is used for high speed data transmission, realize accurate control of power train and chassis system.
J/C
DLC3
Engine ECU
(ECM)
Intelligent Tester II
Engine ECU (ECM) uses the CAN protocol for diagnostic communication and communication with other ECUs
-A, -K: Hand-held Tester and a CAN VIM (Vehicle Interface Module) are required for accessing diagnostic data
CAN
Skid Control ECU
Main Body ECU
Certification ECU
Meter ECU
etc.
Engine New Model - Engine

19. Water Proof Connector for Engine & ECT ECU
Instructors
Engine Control System
Engine & ECT ECU (ECM)
Engine ECU (ECM) is located in engine compartment
Water Proof Connector for Engine & ECT ECU
Engine ECU (ECM) is located in engine compartment
Therefore, the water proof connector is used
Engine New Model - Engine

20. Service Point (Engine Control System)
Instructors
Service Point (Engine Control System)
Inspection Procedure
In adoption of water proof connector, check for open circuit in engine ECU (ECM) cannot be done
[Conventional Type]
SST (Check Wire)
In adoption of water proof connector, check for open circuit in engine ECU (ECM) cannot be done
Engine New Model - Engine

21. Higher Engine Hood Opening
Service Point
Opening Engine Hood
2 holes available for serviceability
Higher Engine Hood Opening 1 2 2 1

22. Service Point 6-layers, 4 materials plastic fuel tank
When scrapping the vehicle, drill a hole on the drain mark to drain the fuel before scrapping
SST for removing fuel pump retainer
Drain Mark
( , , )
Charcoal Filter