Cracked solder point forced the driver to upset

I was requested to fix intermittent problems no gear shift, no tachometer,
no speedometer by an owner of a local car repair shop.

I know this often happens among some domestic cars.

 

Closer look

 

The owner must have upset unable to read the speedometer. The AT
didn't shift properly. Without the crystal, the processor had no idea
to work.

 

This type of problem was often caused by the designer who didn't
know the difference of the expansion rate. They should have known
that how the glass-epoxi and the ceramic had different rates.
Engineers who work for the automobile indutries have to study a lot.