8 Attachment(s)
Cluster Service and Repair - Brake System Warning permanently on
Around march, a cluster from France arrived with the famous "permanent brake system warning" and about 70.000 km of roads travelled. Using the tester, the issue was confirmed quickly. RPM values were ~500 too high, speed about 10 km/h too much. Illumination bulbs were darkened but all working - quite normal values for a cluster of this age and mileage.
Attachment 14916RPM being ~500 off
Attachment 14917darkened bulbs
Corrosion near the ceramic hybrid chip (HIC) marked the reason for the permanent brake system warning.
Attachment 14918at the middle of the special IC
One of the larger voltage stabilization capacitors showed heat damage - visible as heat shrink that starts creeping away:
Attachment 14919
All components were removed, cleaned thoroughly and re-installed with a complete set of new capacitors, carefully selected to match their original purpose (like low electric leakage and bi-polar).
Attachment 14920cleaned and tinned
Attachment 14921all in place
Attachment 14922replaced where appropriate
Followed by checks and calibration, confirming the brake system error was fixed, all indicators were working and the illumination was even across the whole cluster.
Attachment 14923night view
http://lln.prelude.de/~lars/20240312...-ANIMATION.gif
http://lln.prelude.de/~lars/20240312...-ANIMATION.gif
