Vehicle cover list
Vehicle |
Engine code |
Year |
LSU sensor |
Note |
Toyota Supra MKIV |
2JZ |
1993 - 1997 |
External sensor needed |
|
Note: Manual transmission only!
Control options
The MaxxECU adapter for Toyota Supra MKIV can be used with V1/RACE or PRO ECUs.
Note: Only for single turbo conversion and manual gearbox. Non VVTI engines (not the same ECU connector).
OEM options |
MaxxECU IO |
V1 |
RACE |
Fuel pump (stock) |
IGN 7 |
Yes |
Yes |
Tachometer |
GPO 8 |
Yes |
Yes |
Vehicle speed |
DIN 2 |
Yes |
Yes |
AC request |
DIN 1 |
Yes |
Yes |
Error light |
GPO 5 |
Yes |
Yes |
Idle stepper |
GPO 1,2,3,4 |
Yes |
Yes |
AC clutch |
INJ 8 |
Yes |
Yes |
Stock boost solenoids |
- |
||
VVTi |
- |
||
Engine fan |
- |
- |
- |
Bluetooth (MDash) |
|
Yes |
Yes |
OEM Knock sensor(s) |
|
||
EGT option |
|
Yes, direct |
Yes, direct |
Wide band lambda |
Yes, External |
Yes, External |
Note: This plugin adapter uses only connector 1 on MaxxECU RACE/PRO units, for extra functionality, the second harness can be added to the RACE ECU.
The PRO ECU have in total of four ECU connectors which could be added for extra functionality: second harness, third harness and/or harness 4.
Using 2JZ Plugin adapter with MaxxECU STREET
Note: The MaxxECU 2JZ plugin can be used in combination with MaxxECU STREET ECU, but it requires some rewiring depending on your setup:
•Stock fuel pump controller can't be used (IGN 7 does not exist on STREET).
•Error light wont work (GPO 5 does not exist on STREET).
•Idle stepper control wont work (GPO 4) does not exist.
•Disconnect GPO 1 (pin 35 in harness adapter) and route to ex new fuel pump relay.
•Disconnect GPO 2 (pin 33 in harness adapter) and route to ex external boost solenoid.
•Disconnect GPO 3 (pin 34 in harness adapter) and route to ex engine fan relay / error light.
2ZJ ECU pinout.
Plugin adapter description
1 |
MaxxECU CMC connector |
2 |
Vehicle harness adapter |
3 |
16-pin extra connector |
4 |
3-pin extra connector for ex. pressure sensor, analog input 4(AIN 4) |
5 |
2-pin extra connector for external intake temperature sensor (IAT). Not included |
ECU location and installation
Stock ECU is located behind plastic guard on passenger side floor.
1.Remove the plastic guard where the ECU is located.
2.Disconnect battery from vehicle.
3.Remove and disconnect stock ECU from vehicle harness.
4.Install MaxxECU adapter harness.
5.Route the included MaxxECU MAP-sensor hose to the intake manifold and connect into the MaxxECU.
6.Route wide band lambda cables to exhaust system, install lambda sensor in exhaust and wire the lambda sensor as instructed below.
7.Some models of the Supra is not equipped with a intake air temperature sensor (IAT) which is recommended to install and connect to the MaxxECU.
3-pin extra connector (0-5V analog input 4)
1 |
Sensor GND |
2 |
Analog input 4 (0-5v) |
3 |
+5V sensor supply |
see also, analog input.
16-pin extra connector
Note: Pinout is from the wire side of the pre-wired cable harness.
Pin |
Description |
Usage |
Note |
1 |
Wide band (VREF) |
|
|
2 |
Wide band (VS) |
|
|
3 |
Wide band (shield) |
|
|
4 |
Wide band (H-) |
|
|
5 |
GPO 6 |
||
6 |
GPO 7 / DIN 3 |
|
|
7 |
- |
|
|
8 |
INJ 7 |
|
|
9 |
Wide band (IP) |
|
|
10 |
Wide band (RCAL) |
|
|
11 |
+12V |
Output |
|
12 |
+12V |
Output |
|
13 |
Engine GND |
|
|
14 |
AIN 1 |
||
15 |
AIN 2 |
||
16 |
AIN 3 |
3-pin extra connector (0-5V analog input 4)
1 |
Sensor GND |
2 |
Analog input 4 (0-5v) |
3 |
+5V sensor supply |
see also, analog input.
Internal wide band lambda (Bosch LSU 4.2) connection
LSU 4.2 wiring with MaxxECU Plugin solutions.
Note: Seen from the wire side of the pre-wired connector.
PIN |
Function (LSU 4.2) |
1 |
VS |
2 |
RCAL |
3 |
+12V |
4 |
H- |
5 |
VREF |
6 |
IP |
See also external wide band lambda wiring.
Optional: Install external intake air temperature (IAT) sensor
Some vehicles are not equipped with an intake air temperature (IAT) sensor and MaxxECU plugin solutions do have the
option to add a sensor.
The intake air temperature (IAT) sensor should be mounted to sense fresh air flow going into the engine.
Depending on the intake manifold construction, the position of the temperature sensor is not given, but preferably mount
the sensor in the intake, or in the pipe before/after the throttle.
IAT wiring
MaxxECU plugin solution are equipped with an optional 2-pin connector for optional IAT wiring.
Mating connector and wires for external IAT sensor.
See also
