Instrument panel background colour is set automatically according to exterior lighting conditions.
When sensor detects "poor lighting" (night), it switches to black background mode; vice versa when a "significant" lighting is detected (day), it switches to white background mode. It is nevertheless possible to customise this function through the "setting" menu function "back light - dashboard 1", on page 62, and possibly set one of the two modes available, night or day, as permanent setting (or go back to auto mode).
Air temperature sensor
Introduction
The engine control system on the diavel uses a sensor that measures air
temperature. This sensor has a resistance of
ntc type (negative temperature coefficient), that reduces its own value when the
temperature increases. The air
temperature sensor allows the engine control unit t ...
Exhaust by-pass valve not working correctly
Fault codes
Dds: exvl diagnosis -> position error, potentiometer, short circuit to ground
or open circuit (s.C. Gnd or c.O.),
Potentiometer short circuited to vdc (potentiometer s.C vdc).
Dashboard: the error "exvl" (exhaust bypass valve) is shown on the service
display. The eobd warning ...
Checking and adjusting the valve clearances
Note
For clarity, the figures show the engine removed from the frame.
Move the piston of the cylinder being checked to tdc of the power stroke: in
this condition, all the valves are closed and
the timing shafts come in neutral position and, therefore, free to rotate; check
to the valve cl ...