Test Point 5

Test Point 5

Brightness sensor
- Engine off
- Shine the pocket lamp on the sensor

PST2 display:
Tester display increases to a value of approx. 97% - 100% Displays darken (dimming takes place slowly).
- Brightening of the sensor

PST2 display:
Tester display drops to a value of 0 - 5% Displays brighten (dimming takes place slowly).

If there is no change in the dimming, the instrument cluster is faulty.