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AUDI A3 2004 – Anti-locking brake system (ABS) MK20 with electronic differential lock (EDL), traction control system (TCS) and electronic stability program (ESP) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2004 - Fuse in fuse holder - brake light suppression relay



Wiring Diagram  AUDI A3 2004 - Fuse in fuse holder - brake light suppression relay https://portal-diagnostov.com/license.html
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DIgnition/starter switch
FBrake light switch
J104ABS control unit
J508Brake light suppression relay
M9Left brake light bulb
M25High level brake light bulb
S9Fuse in relay plate fuse holder
S13Fuse in relay plate fuse holder
S15Fuse in relay plate fuse holder
   A2 Positive connection (15), in dash panel wiring harness
   A36 Connection (75a), in dash panel wiring harness
   A50 Positive connection (30as), in dash panel wiring harness
   B131 Connection (54), in interior wiring harness
   B185 Connection 2 (54), in interior wiring harness
*location, 13-pin relay carrier, under the shelf on the driver's side

Wiring Diagram AUDI A3 2004 - Battery - voltage supply relay main fuse box



Wiring Diagram  AUDI A3 2004 - Battery - voltage supply relay main fuse box https://portal-diagnostov.com/license.html
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ABattery
BStarter
J104ABS control unit
S162Fuse 1 (30) in fuse holder on battery
S163Fuse 2 (30) in fuse holder on battery
T3e3-pin connector, black, on main fuse box
   2 Earth strap, gearbox - body
   12 Earth point, on left in engine compartment

Wiring Diagram AUDI A3 2004 - Speed sensor



Wiring Diagram  AUDI A3 2004 - Speed sensor https://portal-diagnostov.com/license.html
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G44Rear right speed sensor
G45Front right speed sensor
G46Rear left speed sensor
G47Front left speed sensor
J104ABS control unit
   D146 Connection (rear left speed sensor +), in engine compartment wiring harness
   D147 Connection (rear left speed sensor -), in engine compartment wiring harness
   D148 Connection (rear right speed sensor +), in engine compartment wiring harness
   D149 Connection (rear right speed sensor -), in engine compartment wiring harness

Wiring Diagram AUDI A3 2004 - Yaw rate sender - longitudinal acceleration sender - solenoid valve - lateral acceleration sender



Wiring Diagram  AUDI A3 2004 - Yaw rate sender - longitudinal acceleration sender - solenoid valve - lateral acceleration sender https://portal-diagnostov.com/license.html
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G200Lateral acceleration sender
G202Yaw rate sender
G251Longitudinal acceleration sender
J104ABS control unit
N55ABS hydraulic unit
N99Front right ABS inlet valve
N100Front right ABS outlet valve
N101Front left ABS inlet valve
N102Front left ABS outlet valve
N133Rear right ABS inlet valve
N134Rear left ABS inlet valve
N135Rear right ABS outlet valve
N136Rear left ABS outlet valve
N225Vehicle stabilization program switch valve 1
N226Vehicle stabilization program switch valve 2
N227Vehicle stabilization program high pressure valve 1
N228Vehicle stabilization program high pressure valve 2
*for models with four-wheel drive only

Wiring Diagram AUDI A3 2004 - Coding link - ABS hydraulic pump



Wiring Diagram  AUDI A3 2004 - Coding link - ABS hydraulic pump https://portal-diagnostov.com/license.html
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J104ABS control unit
J402Navigation operating electronics control unit
T2626-pin connector, black, on navigation system control unit
V64ABS hydraulic pump
   30 Earth point 1, next to relay plate
   249 Earth connection 2, in interior wiring harness
   277 Earth connection 3, in interior wiring harness
   B139 Connection (LPL), in interior wiring harness
*for models with radio or navigation system NS-low only
**for models with radio navigation system RNS-D only
#is dropped, from model year 2003

Wiring Diagram AUDI A3 2004 - Brake pressure sender - brake pressure solenoid trip switch



Wiring Diagram  AUDI A3 2004 - Brake pressure sender - brake pressure solenoid trip switch https://portal-diagnostov.com/license.html
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F84Brake pressure solenoid trip switch
G201Brake pressure sender 1
G214Brake pressure sender 2
J104ABS control unit
N247Brake pressure solenoid valve
T6r6-pin connector, black, on brake servo
T14c14-pin connector, connector prewiring ESP

Wiring Diagram AUDI A3 2004 - Steering angle sender - diagnosis



Wiring Diagram  AUDI A3 2004 - Steering angle sender - diagnosis https://portal-diagnostov.com/license.html
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G85Steering angle sender
J104ABS control unit
J218Combi-processor in dash panel insert
J...Engine control units
T1010-pin connector, white, in plenum chamber
T1616-pin connector, black, shelf centre console (diagnostic connector)
T32a32-pin connector, green, on dash panel insert
   249 Earth connection 2, in interior wiring harness
   A76 Connection (diagnosis wire K), in dash panel wiring harness
   A121 Connection (high bus), in dash panel wiring harness
   A122 Connection (low bus), in dash panel wiring harness

Wiring Diagram AUDI A3 2004 - Combi-processor in dash panel insert - traction control system warning lamp



Wiring Diagram  AUDI A3 2004 - Combi-processor in dash panel insert - traction control system warning lamp https://portal-diagnostov.com/license.html
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E256TCS and ESP button
G34Front left brake pad wear sender
J218Combi-processor in dash panel insert
K32Brake pad warning lamp
K86Traction control system warning lamp
T3232-pin connector, blue, on dash panel insert
   249 Earth connection 2, in interior wiring harness
   277 Earth connection 3, in interior wiring harness
   A132 Connection (TCS/ESP), in dash panel wiring harness
   B145 Positive connection (58b), in interior wiring harness