Tcarbon here is your info for speed sensor from bentely
02-21-2007, 10:54 AM
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Tcarbon here is your info for speed sensor from bentely
Audi > TT > 2000 - 2005
1.8 Liter 4-Cyl. 5V Turbo Generic Scan Tool Engine Code(s): AMU, BEA, ATC, AWP
24 - Multiport Fuel Injection (MFI)Speed signal, checking Recommended special tools and equipment
VAG1526 multimeter or VAG1715 multimeter
VAG1594 connector test kit
Wiring diagram
Test requirements
The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK:
Battery voltage must be at least 11.5 volts.
Speedometer -G21- must be OK.
Test sequence
Note:
To test speed signal, vehicle must be driven. Doing this requires a second person.
WARNING!
Secure Scan Tool (ST) on the rear seat and have it operated from there by second technician.
Connect diagnostic tester => page AUDI-TT-FU04-ST-001-03ST-7.
Start engine and let run at idle.
Under address word 33, select "Diagnostic mode 1: Checking measured values."
Select the measuring value "PID 13: Vehicle speed".
Perform a road test, and have the 2nd person observe the indication on the display.
Check specified value of the vehicle speed:
PID
Diagnostic text
Specified value:
13:
Vehicle speed
approx. vehicle speed
End diagnosis and switch ignition off.
If no speed is indicated:
Connect test box to control module wiring harness => page AUDI-TT-FU04-ST-001-04ST-9, connect test box for wiring test.
To measure voltage, connect multimeter between sockets 3 (terminal 15) +54 (speed signal) of test box.
Jack up front left wheel.
Switch ignition on.
Rotate front wheel, and observe voltage indicated while doing so.
Specified value: 0.0 to at least 4.0 V, fluctuating
Note:
The right front wheel must not turn during this, hold it steady if necessary.
If indicated voltage does not oscillate:
Remove instrument cluster:
=> Repair Manual, Electrical Equipment, Repair Group 90, Instrument cluster, removing and installing
Check wire connection from Engine Control Module (ECM) to Speedometer -G21- according to wiring diagram.
=> Electrical Wiring Diagrams, Troubleshooting & Component Locations
Erase DTC memory of Engine Control Module (ECM) => page AUDI-TT-FU04-ST-002-06ST-30, Diagnostic mode 4: Reset/erase diagnostic data.
Generate readiness code => page AUDI-TT-FU04-ST-003-03ST-63.
1.8 Liter 4-Cyl. 5V Turbo Generic Scan Tool Engine Code(s): AMU, BEA, ATC, AWP
24 - Multiport Fuel Injection (MFI)Speed signal, checking Recommended special tools and equipment
VAG1526 multimeter or VAG1715 multimeter
VAG1594 connector test kit
Wiring diagram
Test requirements
The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK:
Battery voltage must be at least 11.5 volts.
Speedometer -G21- must be OK.
Test sequence
Note:
To test speed signal, vehicle must be driven. Doing this requires a second person.
WARNING!
Secure Scan Tool (ST) on the rear seat and have it operated from there by second technician.
Connect diagnostic tester => page AUDI-TT-FU04-ST-001-03ST-7.
Start engine and let run at idle.
Under address word 33, select "Diagnostic mode 1: Checking measured values."
Select the measuring value "PID 13: Vehicle speed".
Perform a road test, and have the 2nd person observe the indication on the display.
Check specified value of the vehicle speed:
PID
Diagnostic text
Specified value:
13:
Vehicle speed
approx. vehicle speed
End diagnosis and switch ignition off.
If no speed is indicated:
Connect test box to control module wiring harness => page AUDI-TT-FU04-ST-001-04ST-9, connect test box for wiring test.
To measure voltage, connect multimeter between sockets 3 (terminal 15) +54 (speed signal) of test box.
Jack up front left wheel.
Switch ignition on.
Rotate front wheel, and observe voltage indicated while doing so.
Specified value: 0.0 to at least 4.0 V, fluctuating
Note:
The right front wheel must not turn during this, hold it steady if necessary.
If indicated voltage does not oscillate:
Remove instrument cluster:
=> Repair Manual, Electrical Equipment, Repair Group 90, Instrument cluster, removing and installing
Check wire connection from Engine Control Module (ECM) to Speedometer -G21- according to wiring diagram.
=> Electrical Wiring Diagrams, Troubleshooting & Component Locations
Erase DTC memory of Engine Control Module (ECM) => page AUDI-TT-FU04-ST-002-06ST-30, Diagnostic mode 4: Reset/erase diagnostic data.
Generate readiness code => page AUDI-TT-FU04-ST-003-03ST-63.
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