Control Panel Inputs, Outputs, Power Supply & Grounds, MCC

Control Panel Inputs







- Power supply +54
- Ground
- Parking heater
- Instrument lighting heater controls
- Instrument lighting switches, electrically heated rear window and door mirrors

Control panel outputs







- Fan resistor (74)
- Air recirculation motor (38)
- Heater box, shut-off valve (581)
- A/C-request (169)
- Electrically heated rear window and door mirrors (116)


Control Panel







The control panel consists of a display with three control knobs for manual control of temperature, air distribution and fan speed. The electrically heated rear window and door mirrors, air recirculation and eventual A/C is controlled by buttons.


Diagnosis
The control panel does not contain any diagnostic functions and is not connected to a bus.


Control Panel Power Supply












The control panel is supplied with power from +54. When the starter motor is engaged, power supply is missing from +54.
The ventilation fan is connected to +54 via fuse 3. Other functions are supplied with power across fuse 21.


Control panel grounding points












The fan motor is grounded from grounding point G33P and other functions are grounded from grounding point G34S.