Wednesday, October 17, 2018

Instruments - Speedometer Needle Vibrates


Instruments - Speedometer Needle Vibrates



Service Measure Instruments



M62 200 04



March 11, 2002-2006



Subject



R50, R53; speedometer needle vibrates



2002-2006 Mini Cooper (R50) L4-1.6L (W10) Page 116



Complaint



Speedometer vibrates for five seconds when the engine is started.



The fault occurs intermittently.



Vehicles concerned: R50 and R53



Cause



1. Calibration process (design issue)



2. Software problem



Measure



Cause 1:



To avoid there being an imprecise zero position, there are two possible calibration processes for the speedometer needle:



a) Brief recalibration



All needles (including speedometer needle) drop once to the lower stop.



This takes place automatically when the ignition is switched back on after the K-bus has been in sleep mode.



b) Long recalibration



Speedometer needle vibrates or fluctuates for approximately 5 to 10 seconds. This takes place under following conditions:



- If the power supply to the instrument cluster has been disconnected.



- After a battery disconnection



- After a fuse for the instrument cluster has been replaced



- Blown instrument cluster fuse (it is assumed that the speedometer functions correctly when the ignition is switched on despite the blown fuse)



- Temporary drop in the instrument cluster voltage to less than 8.5 Volt Both of these processes are normal for the instrument cluster.



Cause 2:



If the fault cannot be explained by the calibration process described above, do not replace any parts.

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