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
| 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.
Adding a Haltech Wideband Kit (highly recommended)
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.