3
This Self-study Programme provides you with information
regarding design and function.
The Self-study Programme is not a Workshop Manual!
Please refer to the Service Literature for all the relevant
maintenance and repair instructions.
Page
Engine .........................................................
Technical data, crankshaft, cylinder head,
camshaft timing, cooling circuit, engine
lubrication, overview of components, air ducting,
charging, exhaust system, pneumatically
controlled systems, charge pressure control, air
divert control in overrun, ACF system, crankcase
breather
4
Motronic ME 7.1 ..........................................
Subfunctions, system overview
31
Subsystems of the Motronic .....................
Torque-oriented engine management, torque-
oriented functional structure, Electronic throttle,
exhaust gas temperature control
33
Sensors .......................................................
Additional sensors of the Motronic
49
Auxiliary signals/interfaces ...................... 57
Functional diagram ..................................... 62
Self-diagnosis .............................................
Vehicle diagnosis, test and information system
VAS 5051, test box V.A.G 1598/31
64
Transmission ..............................................
Self-adjusting clutch, gearbox
66
Contents
Important!/Note!
New!
5
The technical data
•
Configuration:
V6 engine with 90° V-angle and twin
turbochargers
•
Engine code:
S4: AGB
A6: AJK
•
Output:
S4: 195 kW at 5800 rpm
A6: 169 kW at 5800 rpm
•
Torque:
S4: 400 Nm at 1850 to 3600 rpm
A6: 310 Nm at 1700 to 4600 rpm
•
Maximum speed:
6800 rpm
•
Compression ratio:
9.3 : 1
•
Displacement:
2671 cm
3
•
Bore:
81 mm
•
Stroke:
86.4 mm
•
Weight:
approx. 200 kg
•
Engine management:
Motronic ME 7.1
•
Firing order:
1-4-3-6-2-5
•
Fuel type:
S4: 98/95/91 RON
A6: 95/91 RON
•
Compliant with emission standard:
EU III-DFigures obtained using 98 RON
unleaded premium fuel to
89/491/EEC.
Figures obtained using 95 RON
unleaded premium fuel to
89/491/EEC.
500
450
400
350
300
250
200
150
100
50
0200,0
180,0
160,0
140,0
120,0
100,0
80,0
60,0
40,0
20,0
0,0
0 1000 2000 3000 4000 5000 6000 7000
SSP 198/02
Speed [rpm]
Torque [Nm]Output [kW]
S4
500
450
400
350
300
250
200
150
100
50
0180,0
160,0
140,0
120,0
100,0
80,0
60,0
40,0
20,0
0,0
0 1000 2000 3000 4000 5000 6000 7000
SSP 198/46
Speed [rpm]
Torque [Nm]Output [kW]
A6
