Cabin light intensity: Notes

Fig 1: Identifying Communication Diagram - Cabin Light Intensity

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Identifying Communication Circuit Diagram - Cabin Light Intensity

Courtesy of SAAB-SCANIA OF AMERICA, INC.

SID sends bus information Rheostat value 0% when the value of the light intensity in the cabin exceeds a certain level.

In order to increase the life expectancy of the light emitting diodes, the main instrument unit control module will turn off the following instrument illumination:

• Speedometer
• Turbo gauge
• Tachometer
• Coolant temperature gauge
• Fuel gauge

For better visibility, the brightness of the indicator and warning lamps is set to two different levels. Low brightness at night and high brightness during the day.

SID sends bus information Cabin Light Intensity, unit Lux, and at a certain value, the main instrument unit control module will change the brightness of the LEDs listed below.

Common to these LEDs are that they are supplied with +15 from the main instrument unit and are grounded to the main instrument unit control module.

• Fuel reserve indicator lamp
• INFO DISPL lamp
• Central warning lamp
• Rear fog light
• LH direction indicators
• RH direction indicators
• CRUISE
• SPORT
• WINTER
• Main beam
• Lights on