Light Sensor

Fault symptom
Dim display in strong sunlight.

Action
1 Connect the Intelligent Saab Tester (ISAT), select "LIGHT SENSOR VALUE" under "READ VALUES".
The ISAT shows the light sensor value in V. The desired values are min. light strength, approx. 0 V
max. light strength, approx battery positive voltage
Illuminate the light sensor with a pocket lamp and read the value on the ISAT. The voltage should increase as the display light strength increases.
If there is no change on the ISAT or the display, see point 2.
The light sensor value in ISAT changes, but not the lighting, see point 3.
2 Check the lead between control module pin 36 and light sensor pin 4. If there is no fault in the lead, the fault is probably in the light sensor. Change the clock/Saab Car Computor (SCC).
3 If the fault remains, proceed to "Action Before Changing A Control Module".