Note: This is the updated plugin adapter to fit MaxxECU STREET, RACE and PRO.
For information on the first generation MaxxECU V1 adapters, downloaded here.
Vehicle cover list
Vehicle |
Engine code |
Year |
LSU sensor |
Note |
Audi S2 |
3B |
1991 - 1992 |
External sensor needed |
|
Note: Manual transmission only!
Control options
The MaxxECU adapter for Audi S2 with Audi 5-cyl engine (3B) can be used with all our ECUs
OEM options |
MaxxECU IO |
STREET |
V1/RACE/PRO |
Fuel pump |
GPO 1 |
Yes |
Yes |
Tachometer |
GPO 8 |
Yes |
Yes |
Idle solenoid |
INJ 6 |
Yes |
Yes |
Engine fan |
Vehicle control |
Yes |
Yes |
Boost solenoid |
GPO 2 |
Yes |
Yes |
Vehicle speed |
- |
||
AC |
- |
||
AC request |
- |
||
Bluetooth (MDash) |
- |
Yes |
|
Knock sensor(s) |
- |
||
EGT option |
- |
Yes, external |
Yes, direct |
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.
Plugin adapter description
1 |
MaxxECU CMC connector 1 |
2 |
Vehicle harness adapter |
3 |
16-pin extra connector |
4 |
3-pin extra connector for ex. pressure sensor, analog input 4 (AIN 4) |
5 |
6-pin extra connector for coil-on-plug conversion with Audi 1.8T coils |
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.
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 |
INJ 7 |
Not available on MaxxECU STREET |
|
6 |
INJ 8 |
Not available on MaxxECU STREET |
|
7 |
GPO 7/DIN 3 |
Not available on MaxxECU STREET |
|
8 |
GPO 4 |
Not available on MaxxECU STREET |
|
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 |
6-pin extra connector (VAG coil-on-plug conversion)
A |
IGN 1 output |
B |
IGN 2 output |
C |
IGN 3 output |
D |
IGN 4 output |
E |
IGN 5 output |
F |
- |
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.
See also
Example wirings of extra input and output
Last updated: 2017-03-26 by Natanael Ceder
