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Navigation: Wiring information > Plugin ECU solutions

Audi S2/S4/S6 (5-cyl AAN)

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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


 

 

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

-

No

No


AC request

-

No

No


EVAP solenoid

-

No

No

Stock EVAP is not controlled

Bluetooth (MDash)

-

No

Yes


Knock sensor(s)

-

No

No


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

clip0489

Stock vehicle ECU connector seen from the cable side.

 

Vehicle ECU pin6 = AC magnetic clutch activation --> Solder a wire and connect to a free GPO or INJ and configure output as AC magnetic clutch.

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.

 

 

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

clip0230

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.

 

 

16-pin extra connector

16-pin_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

Output

Not available on MaxxECU STREET

6

INJ 8

Output

Not available on MaxxECU STREET

7

GPO 7

Output or digital input

Not available on MaxxECU STREET

8

GPO 4

Output

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

temperature input


15

AIN 2

temperature input


16

AIN 3

0-5V analog input


 

 

 

Internal wide band lambda (Bosch LSU 4.2) connection

clip0197

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

Product page

Download base maps

Example wirings of extra input and output

Audi 5-cyl trigger conversion

Trigger problems

Engine start

 

 

Last updated: 2017-03-23 by Natanael Ceder