1NZ-FE Engine

1NZ-FE Engine

Information on the Toyota 1NZ-FE and 2NZ-FE engine.  It does not cover the hybrid or Atkinson cycle variants.





General Information

Cylinders
4
Displacement
1NZ 1497cc
2NZ 1299cc 
Firing Order
1,3,4,2



CAN

These vehicles use CAN bus for various devices throughout the vehicle. This can include the dashboard, ABS, and Body Control.





Model Variants

1NZ-FE

1.5L displacement, 10.5:1 comp, VVT-i variable intake cam, 6400rpm limit

1NZ-FTE

Turbocharged. Same 10.5:1 comp

2NZ-FE

1.3L version of 1NZ-FE







Sensor Information

Crank/Cam Sensor

This engines uses a Crank Position Sensor and a Cam Position Sensor

It has a 36-2 tooth crank trigger pattern as part of the crankshaft timing chain gear.  It has a 3x tooth cam trigger pattern on the flywheel end of the inlet camshaft.

Crank Trigger Wheel







Crank Sensor

A Reluctor crank position sensor is used.



Reluctor Wiring
Pin
Description
Haltech Connection (Trigger 4-core)
1
Reluctor +
Yellow
2
Reluctor -
Green



Cam Sensor

A Reluctor cam sensor is used. It is located on the back of the cylinder head facing the end of the inlet cam.




Reluctor Wiring
Pin
Description
Haltech Connection (Home 4-core)
1
Reluctor +
Yellow
2
Reluctor -
Green

The OEM Wiring loom as the Cam Sensor Negative shared with the Crank Sensor Negative.  If you are using the OEM wiring loom then the Haltech Trigger- and Home - Green wires should not be used.  Instead use the Blue Signal Ground wire and Enable the Trigger and Home Grounds in the software.




Trigger Configuration














Ignition Coils and Igniter

The ignition coils feature an internal igniter.  These can be wired directly to the ECU. The coils from this engine are commonly used for coil on plug conversions for other engines and are known as NZ coils.


Wiring



 Configuration

Haltech Elite Series Setting
Value
Ignition Mode
Direct Fire
Ignition Edge
Falling
Ignition Dwell Mode
Constant Charge


Dwell




 


Throttle Position Sensor

Early versions of this engine use a cable operated throttle body with a position sensor.


OEM Wiring
Haltech Wiring
Pin 1 - Red/White
5V+
Pin 2 - Brown
Signal Ground
Pin 3 - Yellow/Red
Spare AVI (AVI-10)






DBW Throttle System

Later versions of this engine use a single Drive By Wire throttle body.




DBW Throttle Wiring


Position Sensors
Pin
Description
Haltech Connection
3
Signal Ground
Signal Ground
4
TPS2 Signal
AVI-3
5
5V+
5V+
6
TPS1 Signal
AVI-2

Drive Motor
Pin
Haltech Connection
1
DBW2
2
DBW1



DBW Accelerator Pedal Position Sensors Connection












MAP Sensor

These engines do not come with a MAP sensor.
Use the internal MAP sensor that comes with your ECU.  For higher boost levels an external MAP sensor should be used instead, connected to a spare AVI.









Variable Cams

These engines come with Toyota's VVT-i continuously variable cam control system.  it offers up to 60deg of inlet cam movement.









Idle Valve

DBW variants use the throttle body for Idle Control.
Cable throttle variants of this engine use a 3-pin (Bypass Air Control) Valve which is duty controlled by the ECU via 1x outputs. Even though it has 3-wires it should be configured as a 2-wire BAC.

3-pin BAC Wiring
Pin
Function
Haltech Connection
1
Open Signal
Spare Output
2
Power
12V+ Switched
3
Close Signal
Ground to Engine









Coolant Temperature

Wiring is not polarity sensitive
Pin
Haltech Connection
1
Any Spare AVI*
2
Signal Ground
An AVI with a selectable Pullup should be used.  If not and external 1k pullup to 5V should be connected.







Air Temp

An Air Temperature Sensor is incorporated in the MAF Sensor unit.  See the MAF section for wiring information.





Knock Sensor


Pin
Haltech Connection
1 - White
Signal Ground
2 - Black
Knock Signal






MAF Sensor

This engine has a MAF for engine load calculation, and the MAF unit incorporates an Air Temperature Sensor.
Although most users of Haltech ECUs will be deleting the MAF, it is possible to use a MAF if you prefer.




Pin
Description
Haltech Connection
1
12V+ Switched
---
2
MAF Sensor Signal Ground
Signal Ground
3
MAF Signal
Any Spare AVI
4
Air Temperature Sensor  Signal
Any Spare AVI with pullup (AVI7)
5
ATS Signal Ground
Signal Ground







O2 Sensors

These engines come with narrow band O2 sensor.  These are only useful for targeting Lambda 1.0 and cannot be used for engine tuning.


For correct operation a Haltech WB1 kit is highly recommended for this application, with the provided 4.9 sensors replacing the pre-cat sensors.  Sensors use a 22mm socket or spanner to remove and replace.









Vehicle Speed Sensor

This engine uses a Hall Effect / Reluctor Vehicle Speed sensor. The signal is connected to the OEM dashboard and this transmits Vehicle Speed over CAN to the ECU.  The sensor can be wired directly to your Haltech ECU.



Hall Effect Speed Sensor
OEM Wiring
Description
Haltech Connection
1 - Black
12V+ Switched
---
2 - White/Black
Signal Ground
Signal Ground
3 - Pink
Signal
Any Spare DPI or SPI






Injector Data

Flow

The injector flow rate is measured with the injectors held wide open at 100% duty.  For fuel systems with a fixed regulator pressure (often returnless systems) that is not referenced to manifold pressure the flow needs to be mapped over Manifold Pressure for accurate tuning.



Dead Time

When an injector is commanded to open for a certain amount of time, the dead time is the amount of time the injector is not actually open during this period.  It covers the time to energise the solenoid and begin to open and the time to close as well.  There are also transient periods during which the injector is opening and closing where fuel flow is not at full capacity so this lost peak flow period is also taken into account.  










OEM ECU Information






ECU Pinout













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