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
|3||Signal Ground||Signal Ground|
DBW Accelerator Pedal Position Sensors Connection
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.
These engines come with Toyota's VVT-i continuously variable cam control system. it offers up to 60deg of inlet cam movement.
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
|1||Open Signal||Spare Output|
|3||Close Signal||Ground to Engine|
Wiring is not polarity sensitive
|1||Any Spare AVI*|
An AVI with a selectable Pullup should be used. If not and external 1k pullup to 5V should be connected.
An Air Temperature Sensor is incorporated in the MAF Sensor unit. See the MAF section for wiring information.
|1 - White||Signal Ground|
|2 - Black||Knock Signal|
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.
|2||MAF Sensor Signal Ground|
Any Spare AVI
|4||Air Temperature Sensor Signal|
Any Spare AVI with pullup (AVI7)
ATS Signal Ground
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
|1 - Black||12V+ Switched|
|2 - White/Black||Signal Ground|
|3 - Pink||Signal||Any Spare DPI or SPI|
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.
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