A5 Quattro Coupe V6-3.2L (CALA) (2009)
Vehicle Speed Sensor: Testing and Inspection
Diagnostic Procedures
Speed Signal, Checking
The following procedure requires a test drive. Observe all safety precautions.
Special tools, testers and auxiliary items required
‹› multimeter.
‹› Wiring diagram.
Test requirements
‹› The Speedometer (G21) OK.
‹› The Motronic Engine Control Module (ECM) (J623) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check
Start diagnosis
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Connect the scan tool.
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Perform a road test with a vehicle speed greater than 5 Km/h.
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Using the scan tool, Check the vehicle speed: