A4 V6-3.0L (AVK) (2004)
Vehicle Speed Sensor: Testing and Inspection
WIth Generic Scan Tool
Checking Additional Signals
Checking speed signal
Test requirement:
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Function and display of speedometer OK.
Troubleshooting:
CAUTION: To reduce the risk of accident during road tests, always observe safety precautions. See: Powertrain Management/Fuel Delivery and Air
Induction/Service Precautions/Technician Safety Information/Motronic Injection System, Safety Precautions
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Connect diagnostic tester. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Diagnostic Tester, Connecting
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Start engine and let run at idle.
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In diagnostic function "33 - OBD", select "Diagnostic mode 1- Check measuring values".
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Select the desired measuring value "PID 13 - Vehicle speed".
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Perform a road test, and have the 2nd person observe the indication on the display.
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End diagnosis and switch ignition off.
If no speed is displayed:
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Check terminal resistance for CAN-Bus. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Terminal Resistance For Can-Bus, Checking
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1
-
Check DTC memory, Diagnostic mode 3 - Check DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 3: Check DTC Memory
2
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Erase DTC memory, diagnostic mode 4 - Reset/erase diagnostic data. See: Powertrain Management/Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 4: Check Reset/Erase
Diagnostic Data
3
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes/Audi Drive Cycle/Readiness Code/With Generic Scan Tool/Readiness Code, Generating