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 |
ABY |
1993 - 1996 |
External sensor needed |
|
Audi S4 (C4) |
AAN |
1991 - 1994 |
External sensor needed |
No support for the V8 engine, check your engine code |
Audi S6 (C4) |
AAN |
1995 - 1997 |
External sensor needed |
No support for the V8 engine, check your engine code |
Audi RS2 |
ADU |
1994 - 1996 |
External sensor needed |
Note: Manual transmission only!
Control options
The MaxxECU adapter for Audi S2/S4/S6 with Audi 5-cyl engine (AAN) can be used with all our ECUs
OEM options |
MaxxECU IO |
STREET |
V1/RACE/PRO |
Note |
Fuel pump |
GPO 1 |
Yes |
Yes |
|
Tachometer |
GPO 8 |
Yes |
Yes |
|
Check engine light |
GPO 3 |
Yes |
Yes |
|
Idle solenoid |
INJ 6 |
Yes |
Yes |
|
Boost solenoid |
GPO 2 |
Yes |
Yes |
|
Engine fan |
Vehicle control |
Yes |
Yes |
|
Vehicle speed |
DIN 2 |
Yes |
Yes |
|
AC |
- |
|||
AC request |
- |
|||
EVAP solenoid |
- |
Stock EVAP is not controlled |
||
Bluetooth (MDash) |
- |
Yes |
||
Knock sensor(s) |
- |
|||
EGT option |
- |
Yes, external |
Yes, direct |
Note: MaxxECU plugin do not support AC control, because most people remove the AC on these vehicles anyway.
Older versions of this plugin did control the AC.
Rewire to get AC support
Stock vehicle ECU connector seen from the cable side.
Vehicle ECU pin6 = AC magnetic clutch deactivation --> Solder a wire and connect to a free GPO or INJ and configure output as a User output.
Vehicle ECU pin 41 = Digital signal active when AC compressor is on --> solder a wire and connect to available DIN and configure input as AC request/idle up.
1. Configure the wired GND output as an available user output.
2. Configure the user output to DISABLE the AC using the above condition (or any other condition you like), in this example we disable the AC clutch above 85% Throttle position.
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 |
2 |
Vehicle harness adapter |
3 |
16-pin extra connector |
4 |
3-pin extra connector for ex. pressure sensor, analog input 4(AIN 4) |
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 |
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 |
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: 2017-03-23 by Natanael Ceder
