2AZ-FE Engine

2AZ-FE Engine

Information on the Toyota 2AZ-FE 2.4L engine







Haltech ECU Options

The Elite 1500 or 2500 are suitable for this engine





General Information

Cylinders
4
Displacement
1AZ 1998cc
2AZ 2362cc
Firing Order
1,3,4,2




CAN

This vehicles uses CAN bus for various devices throughout the vehicle. This can include the dashboard, ABS, and Body Control.  It is NOT supported by the Haltech Elite ECU.




Model Variants

There are a number of variants of the 2AZ-FE engine.

1AZ-FE

2.0L, 9.6:1 comp, intake VVT-i continuous cam timing control, DBW

1AZ-FSE

11.0:1 comp, Direct Injection (D4), NOT SUPPORTED BY HALTECH

2AZ-FE Early

2.4L, 9.6:1 comp

2AZ-FE Late

9.8:1 comp, revised intake cam with more lift and duration, piston oil squirters

2AZ-FSE

11.0:1 comp, Direct Injection (D4), NOT SUPPORTED BY HALTECH

2AZ-FXE

12.5:1 comp, Atkinson cycle, new pistons and intake cam, used in Hybrid vehicles,  NOT SUPPORTED BY HALTECH










Sensor Information

Crank/Cam Sensor

This engines uses a Crank Position Sensor and a Cam Position Sensor.  The crank trigger has 36x teeth with a 2x teeth missing gap and is located on the front of the crankshaft behind the drive pulley.  The cam trigger has 3x teeth on the end of the intake camshaft.


2AZ Crank Trigger



2AZ Cam Trigger










Crank Sensor

A Reluctor crank position sensor is used.  Unlike most Toyota wiring looms this model has a separate crank sensor ground all the way to the ECU.

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



Cam Sensor

A Reluctor cam sensor is used. Unlike most Toyota wiring looms this model has a separate cam sensor ground all the way to the ECU.

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










Ignition Coils and Igniter

The ignition coils feature an internal igniter.  These can be wired directly to the ECU.   



PinDescriptionHaltech Connection
112V+ Switched---
2IGF (Fault Signal)---
3ECU SignalIgnition Output
4Ground to Cylinder Head---


Dwell Time










DBW Throttle System

This engine uses a single Drive By Wire throttle body.

DBW Throttle Wiring



Pin
Description
Haltech Connection
1
Motor -DBW-2 (Brown/Red)
2
Motor +DBW-1 (Brown/Black)
3Signal GroundSignal Ground (Black/White)
4
TPS2
AVI-2 (Orange/Black)
55V+5V+ (Orange)
6
TPS2
AVI-3 (Orange/Red)



DBW Accelerator Pedal Position Sensors Connection



Pin
Description
Haltech Connection
1
5V+25V+ (Orange)
2
Signal Ground2Signal Ground (Black/White)
3
APP2AVI-5 (Orange/Green)
4
5V+15V+ (Orange)
5
Signal Ground1Signal Ground (Black/White)
6
APP1AVI-4 (Orange/Yellow)








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.

If preferred you can 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

This engine comes with continuously variable cam timing on the intake camshaft.  This is supported by the Haltech Elite ECU.












Idle Control

This engine uses the Drive By Wire Throttle to control idle speed.





Coolant Temperature



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







Air Temp

An Inlet Air Temperature Sensor is incorporated in the MAF Sensor on this engine.  See the MAF Sensor section for wiring information. If the MAF has been deleted a replacement Air Temperature Sensor should be installed in the inlet as close as possible to the vacuum source for the MAP sensor.  The Haltech HT-010206 is suitable for this.  

Haltech HT-010206 Air Temperature Sensor


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







Knock Sensor

This engine comes with a non-resonant style knock sensor and this can be used with your Elite 1000, 1500, 2000, or 2500 ECU.



Pin
Haltech Connection
1
Knock Signal
2
Signal Ground






MAF 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
Air Temperature Signal
Spare AVI (AVI-7 Grey)
2
Air Temperature Ground
Signal Ground (Black/White)
3
12V+ Switched--- (Grey/Red)
4
MAF Signal GroundSignal Ground (Black/White)
5MAF SignalSpare AVI








O2 Sensors

This engine has Narrow Band O2 sensors.  Although they can be used for light load tuning for Lambda 1.0, they cannot be used for tuning under power.

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.










Alternator Control

This engine has an Alternator that requires a signal from the ECU to control the charging voltage.










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.

Injector Flow: ~370 cc/min

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


   

Location

The OEM ECU is located in the engine bay above the gearbox.




ECU Pinout

                
   





    • Related Articles

    • 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 ...
    • 1UZ-FE Engine

      Information on the Toyota 1UZ-FE Engine Haltech ECU Options All Haltech ECU models can run the engine.   Elite 1000 and higher is required to control the factory stepper motor idle valve.  Elite 950, 2000, and 2500 are required for sequential ...
    • 1FZ-FE Engine

      Information on the Toyota 1FZ-FE engine.  The 1FZ-F is a carburettor version and is not covered in this guide. 80-Series 1FZ-FE with Distributor ignition 100-series 1FZ-FE with Waste Spark ignition and crank/cam sensors Haltech ECU Options Engine is ...
    • Don’t Blow Your Engine!

      We have all heard the stories and many of us have experienced first hand an engine failure. Whether it be a catastrophic “con rods hanging out of the block, piston melting, bearing crushing, block splitting” belter or just a simple gasket failure, ...
    • Engine

      This section will guide you through setting up the software and calibrating the necessary values to enable you to start your engine and achieve a steady idle. By the end of this section, the vehicle will not be ready to be driven, but will be ready ...