Audi TT (2007 year). Manual — part 240
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
41
Coding
The coding tells the control unit the system variant,
powertrain type, gearbox type, wheel size and type
of tyre used on the vehicle. The control unit accepts
the new coding after ignition on/off.
Tyre type and size (16"-18", standard tyre, SST tyre)
Powertrain type (front, quattro, gearbox variant)
6
= PR No. 7K6 (= low tyre pressure indicator)
Data blocks
The data blocks are used to check key system status
information.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
42
Wheels and tyres
Function diagram
381_057
Positive
Earth
Powertrain CAN bus
Input signal
Output signal
J793
Tyre pressure monitor control unit 2
J104 ESP control unit
E492 Tyre pressure monitor display button
A
Signal from wheel speed sensor, rear right
B
Signal from wheel speed sensor, rear left
C
Signal from wheel speed sensor, front right
D
Signal from wheel speed sensor, front left
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
43
CAN data exchange
381_058
J793 Tyre pressure monitor control unit 2
System status (all)
Activation of warning lamp, text display (7,6)
J533 Diagnostic interface (7)
Date, time
Terminal 15 -counter
Mileage (km)
Reversing light switch
Trailer detected
J285 Control unit with display in dash panel
insert (6)
Displayed vehicle speed
Handbrake activated
Error status, ambient temperature
J220 Motronic control unit (1)
CCS status
Clutch switch
Coolant temperature
Engine torque
Engine speed
Gearbox variant
J104 ESP control unit (2)
ESP system status
ABS active
EBD, EDL and ESP intervention
TCS and EBC request
TCS shift control
Brake light sensor
Lateral acceleration
Yaw rate
J527 Steering column electronics control unit (3)
G85 Wheel angle sender
max. steering angle
J217 Automatic gearbox control unit (4)
Selector mechanism active
Target gear or selected gear
Selector lever position/driving program
Torque converter lock-up clutch
J492 Four-wheel drive control unit (5)
Error status
Clutch open
Clutch torque
Clutch stiffness
Information sent by control unit J793
Information received and evaluated by
control unit J793
Powertrain CAN bus
Dash panel insert CAN bus
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
44
Wheels and tyres
Overview
The Audi TT for the North American market uses an
improved version of the tyre pressure monitoring
system as featured previously in the Audi A6 (USA)
.It is a direct measuring system with tyre pressure
sensors in the wheels.
381_059
J533
J502
E492
J285
G222
Dash panel insert CAN
Powertrain CAN bus
G223
G224
G225
J285
Control unit with display in dash panel insert
J533
Data bus diagnostic interface
J502
Tyre pressure monitor control unit
E492
Tyre pressure monitor display button
G222-225
Tyre pressure sensors
Tyre pressure monitoring system (US spec)
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