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Transcript
Carman scanFor EMS PROfesor
1.11.4 Vehicle Speed Sensor Field Service Example
Field example of VS sensor malfunction : Signal noise detection
Trouble
Cause of
trouble
Related
vehicle
Grandure XG V6 2.0L DOHC vehicle: Vehicle take off with 2 or 3 gear shifting.
Acceleration is impossible and VS is displayed with 40 - 70 Km/H on scanner
even if vehicle stop.
Too much noise is detected in VS signal. ECU identify driving with high speed.
All vehicles (Especially in case that ECU receive VS signal from TCU)
Signal view
VS signal with problem detection
VS signal is not related to shape.
Only check how many detect signal above 1.0 volt per 1sec.
53