2JZ / 1JZ Engine
Information on the Toyota 2JZ-GTE, 2JZ-GE, 1JZ-GTE engine
Haltech ECU Options
Haltech ECUs do not support the ETCS-i throttle
Recommended Haltech ECU Models
Haltech ECU Model | Support Level |
Elite 750 | Sequential Fuel and Ignition, VVTi, OEM Stepper Idle NOT Support |
Elite 2000 | Sequential Fuel and Ignition, VVTi, OEM Stepper Idle Supported |
Elite 2500 | Sequential Fuel and Ignition, VVTi, OEM Stepper Idle Supported. Full DBW Support |
General Information
| Cylinders | 6 |
| Displacement | 1JZ - 2492 cc 2JZ - 2997cc |
| Firing Order | 1,5,3,6,2,4 |
| Cylinder Orientation | Cylinder 1 located at front of engine |
Model Variants
There are a number of variants of the Toyota JZ engine family.
2JZ-GTE
Sequential Twin Turbos, Sequential Fuel, Direct Fire Ignition, Stepper Motor Idle, 8.5:1 comp
2JZ-GTE VVTi
Sequential Twin Turbos, Sequential Fuel, Waste Spark Ignition, Stepper Motor Idle, Some have ETCSi Throttle System (NOT SUPPORTED), VVTi Variable Intake Cam, 8.5:1 comp
2JZ-GE Distributor
Sequential Fuel, Distributor Ignition, Stepper Motor Idle, Variable Intake, 10.0:1 comp
2JZ-GE VVTi
Sequential Fuel, Waste Spark Ignition, Stepper Motor Idle, Variable Intake, VVTi Variable Intake Cam, 10.0:1 comp
1JZ-GTE
Twin Parallel Turbos, Semi-Sequential Fuel, Direct Fire Ignition, Stepper Motor Idle, 8.5:1 comp
1JZ-GTE VVTi
Single Turbo, Sequential Fuel, Waste Spark Ignition, Stepper Motor Idle, VVTi variable intake cam, Some have ETCSi Throttle System (NOT SUPPORTED), 9.0:1 comp
Sensor Information
Crank/Cam Sensor
The turbo models of this engine all use a Crank Position Sensor and a Cam Position Sensor. Some aspirated models use a Distributor instead of a crank and cam sensor.
Crank Sensor
Crank sensor models of the 2JZ and 1JZ use a crank trigger located as part of the timing belt drive gear on the crank with the sensor near the alternator. Non-VVTi engine have a 12x tooth, and VVTi models have a 36-2 (36 teeth with 2 missing teeth.
12x Non VVTi
36-2 VVTi
2JZ Crank Sensor
| Pin | Description | Haltech Connection (Trigger 4-core) |
| 1 | Trigger + | Yellow |
| 2 | Trigger - | Green |
(if using OEM Toyota wiring, pin 2 should go to Signal Ground)
Cam Sensor
Two Cam Position Sensors are present on the Non VVTi engine, both are Reluctor sensors with a single tooth pickup
The sensors are located on the LHS of the cylinder head near the intake manifold/injectors with G1 located midway along the engine, and G2 located towards the rear. The G2 sensor is used with Haltech Terminated Harnesses.
The VVTi models use a single Reluctor Cam Position Sensor which has a 3x tooth pickup.
2JZ Cam Sensor
| Pin | Description | Haltech Connection (Home 4-core) |
| 1 | Home + | Yellow |
| 2 | Home - | Green |
(if using OEM Toyota wiring, pin 2 should go to Signal Ground)
Distributor
A 3x Reluctor trigger system is used on the 2JZ-GE engine. This has a 24x tooth pickup with a single Reluctor pickup (NE), and has a second 1-tooth pickup that has 2x separate sensors (G1 and G2) with only one of the pickups required for Haltech use. All sensors use a common shared wire back to the ECU (G-).
2JZ-GE Distributor
OEM Wiring Diagram
2JZ-GE Distributor Wiring
| OEM Connection | Description | Haltech Connection |
| Pin 1 NE (24x) Black | Trigger + | Yellow(Trigger 4-core) |
| Pin 2 G1 (1x) Red | Home + | Yellow (Home 4-core) |
| Pin 3 G2 (1x) White | No Connection | --- |
| Pin 4 G- Green | Signal Ground | Blue (Trigger 4-core) |
This model requires the Haltech Trigger and Home Grounds to be Enabled
Trigger Configuration - Non VVT (G2 - Rear Cam Sensor)
Notes:
If OEM Wiring is used such as when an adapter harness is installed, then the Ground Reference should be changed to ENABLED for both Trigger and Home.
If the G1 Mid Cam Sensor is used the TDC Offset will need to be increased by 360 to become 365.
Trigger Configuration - VVT
Ignition Coils and Igniter
The ignition coils on this engine require an external igniter module. Haltech HPI igniter module are a good choice for this if the OEM unit is not available.
Direct Fire Models
Non-VVTi models use a coil per plug in Direct Fire
2JZ-GTE Non VVTi Igniter Module
This igniter uses Constant Charge with a Falling Edge. Using other settings will damage the ignition system.
Waste Spark Models
VVTi models use Waste Spark. Coil is on plug with a lead providing spark to the paired cylinder.
2JZ-GTE VVTi Igniter Module
Wiring information is visible on the igniter body.
Pin | Function | Haltech Connection |
C1 | Coil #1 and 6 -ve | --- |
+B | 12V+ | --- |
TAC | Tacho | --- |
T1 | ECU Ignition Output #1 | Ignition Output 1 |
T2 | ECU Ignition Output #2 | Ignition Output 2 |
T3 | ECU Ignition Output #3 | Ignition Output 3 |
IGF | Ignition Fail Signal | --- |
GND | Ground to Cylinder Head | --- |
C3 | Coil #3 and 4 -ve | --- |
C2 | Coil #2 and 5 -ve | --- |
Distributor Models
| Label | Function | OEM Wire Colour | Haltech Connection |
| C | Coil - | Black/White | No Connection |
| EXT | Tacho | Black | No Connection |
| B | Coil + | Black/Red | No Connection |
| T | IGT | White | Ignition Output#1 |
| F | IGF | White/Red | No Connection |
This igniter uses Constant Charge with a Falling Edge. Using other settings will damage the ignition system.
Dwell Time
Coil On Plug Models
Setting dwell higher than 2.2ms@14V can cause the ignition to breakup at around 6000rpm, feeling like an RPM Limiter.
Distributor Models
VVTi Variable Cam
The Toyotai VVT-i system present on the 2JZ engine controls only the inlet cam. It uses the same single cam position sensor used for engine sync to know where exactly the cam is. The ECU controls the movement of the cam via a single output to a solenoid that is powered from 12V+. The control system operates in closed loop to maintain the cam in the target position.
For these engines, the Cam Control should be set to use the HOME for the input.
Throttle Position Sensor
This engine uses a cable operated throttle body with a position sensor.
2JZ-GTE Non-VVTi TPS
2JZ-GTE VVTI TPS
Left to Right from Above image
| OEM Wiring | Haltech Wiring |
| Pin 1 - VC | 5V+ |
| Pin 2 - VTA | Signal |
| Pin 3 - IDL | No Connection |
Pin 4 - E2 | Signal Ground |
MAP Sensor
This vehicle comes with a MAP sensor. This is located on the intake manifold.
| OEM Wiring | Description |
| 1 - Brown | Signal Ground |
| 2 - Yellow/Green | Signal |
| 3 - Blue/Red | 5V+ |
This sensor only reads up to 126 kpa of boost pressure.
Calibration: Use "MAP - Toyota Supra JZA80 2JZGTE 079800-3250.cal"
Although these engines come with a MAP sensor, if preferred the internal Haltech MAP sensor can be used which reads up to 200 kPa of boost pressure.
For higher boost levels an external MAP sensor should be used instead.
Idle Valve
This engine uses a Stepper Motor style idle valve.
| Pin | Haltech Connection |
| A | Stepper 4 |
| B | Stepper 1 |
| C | 12V+ Ign Switch or No Connection |
| D | 12V+ Ign Switch or No Connection |
| E | Stepper 3 |
| F | Stepper 2 |
Drive Type: Low Side if 12V+ is connected. Both if 12V+ is not connected
Steps:240 Speed:75
Coolant Temperature
Located under the Cylinder#1 inlet runner
Wiring is not polarity sensitive
Calibration: Use "Temperature - Toyota JZX100 Coolant Sensor.cal"
Created for Haltech ECUs using a 1k pullup to 5V
Air Temp
Located on the inlet plenum
Wiring is not polarity sensitive.
| Pin | Haltech Connection |
| 1 | Air Temp Signal |
| 2 | Signal Ground |
Calibration: Use "Temperature - GM Air Sensor.cal"
Created for Haltech ECUs using a 1k pullup to 5V
Knock Sensor
The 2JZ Engine uses 2x knock sensors. One for the front 3 cylinder and one for the back 3 cylinders.
These are a single wire Resonant Type sensor which are specific to only this engine. They will be only reliable with an unmodified engine.
For more reliable knock control they should be updated to use a "donut" style Non-Resonant sensor that can be tuned to suit the engine.
The Haltech HT-011100 sensor is suitable for this application.
O2 Sensors
The 2JZ engine uses older style Narrowband Sensors. It is strongly recommended to replace these with Wideband O2 sensors.
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 sensor replacing the pre-cat sensor. Sensors use a 22mm socket or spanner to remove and replace.
Vehicle Speed Sensor
This engine uses a Vehicle Speed sensor. Some models use a 3-pin Hall Sensor that sends the signal to the speedo, then this sends a signal to the OEM ECU.
Some use a 2-pin Reluctor sensor wired directly to the OEM ECU.
Hall Effect Speed Sensor
| OEM Wiring | Description |
| 1 - Yellow | 12V+ |
| 2 - Red | Signal Ground |
| 3 - Blue/Red | Any Spare SPI |
Reluctor Speed Sensor Wiring
| OEM Wiring | Description |
| Signal + | Any Spare SPI |
| Signal - | Signal Ground |
Approximate Calibration Pulses Setting: 2450 pulses/km
Sequential Twin Turbo System
The 2JZGTE uses an ECU controlled sequential Twin Turbo System. This can be controlled by a Haltech ECU.
Injector Data
1JZ connects injectors 1+4, 3+5, 2+6
All others are sequential
Flow
1JZ - 330cc/min
2JZ JDM - 370cc/min
2JZ USDM - 440cc/min
Dead Time
OEM ECU Information
Location
The OEM ECU for the JZA80 Supra is located under in the passenger floor area near the firewall under the carpet and a cover.
ECU Pinout
Base Maps
Base maps have been created for use with the Haltech Elite Adapter Harnesses and these come with ESP Software.
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