83A-8
AFTER REPAIRCheck for correct operation.
V1 MR-376-X76-83A000$020.mif
83A
1. OPERATION OF THE NEEDLE INDICATORS
Speedometer
The vehicle speed signal is transmitted to the instrument panel by a wire link.
The information is produced by the ABS computer or a speed sensor located on the gearbox.
Engine speed indicator
The engine speed signal is transmitted to the instrument panel by a wire connection (signal provided by the injection
computer).
2. OPERATION OF THE TRIP COMPUTER
Coolant temperature bargraph
The coolant temperature signal is transmitted to the instrument panel by a wire connection.
The signal is produced by the coolant temperature sensor.
Above 115°C (inclusive), all the segments are illuminated with the warning light.
From 105°C (inclusive) to 115°C (not inclusive), six segments are illuminated.
From 80°C (inclusive) to 105°C (not inclusive), four segments are illuminated.
From 50°C (inclusive) to 80°C (not inclusive), two segments are illuminated.
No segments are illuminated when the temperature is below 50°C.
Fuel level bargraph and low fuel level warning light
The separate "low fuel level" warning light comes on when the reserve level is reached and nine segments of the
bargraph are extinguished.
The wire signal from the fuel sender is processed to calculate the fuel level and manage the warning light.
SPECIAL NOTE ABOUT OPERATION WHEN THE IGNITION IS SWITCHED ON:
A 3 second self-test is run on the "low fuel level" warning light when the ignition is switched on.
Case 1: if the fuel sender is connected but the fuel level in the tank is lower than the reserve threshold, the
continued illumination of the warning light after 3 seconds depends on the fuel level signal (smoothed and taking
into account recalibrations).
Case 2: if the fuel sender is not connected and it is the first time the fault appears when switching on the ignition, the
low fuel level warning light first flashes quickly for 2 seconds, then after 1 minute 40 seconds maximum (fault
detection time), the fuel level bargraph goes out, then the low fuel level warning light is illuminated continuously.
Case 3: if the fuel sender is not connected and the warning light had been illuminated before the ignition was
switched on this time, the low fuel level warning light stays illuminated, then after 1 minute 40 seconds, all the
bargraph segments go out.
INSTRUMENT PANEL INSTRUMENTS
Fault finding – System operation
