Test point

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,

90 25 Diagnosis/Troubleshooting, instrument cluster

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