GF54.30-P-3020PPP Displaying Coolant Temperature, Function

GF54.30-P-3020PPP Displaying Coolant Temperature, Function
- MODELS 203.0 /2 /7 as of 1.6.03 up to 23.4.04






A1 Instrument cluster
A1p13 Multifunction display
B11/4 Coolant temperature sensor
N3/9 CDI control unit
N3/10 ME-SFI [ME] control unit

Display of coolant temperature in display






The coolant temperature is shown at the driver's request as a bar display in the multifunction display (A1p13). When the display is located in the basic display (total mileage and trip odometer), for this purpose the scroll forward/back button (S110s1) should be pressed once towards scroll forward using the button (down arrow).
This display is a plateau display, i.e. the bar stops at 95 °C at temperatures from 95 °C to 115 °C. Temperatures in this range are not critical.

The correct temperature is only displayed once the temperature reaches 116 °C. This prevents the d river from being unnecessarily disturbed by the display e.g. when the outside temperature is high. In the event of a defective engine and AC electric suction fan with integrated control (M4/7) temperatures between 96 °C and 116 °C are also displayed.
The warning range starts at 130 °C. As of 130 °C the coolant temperature and the warning message "COOLANT STOP, SWITCH OFF ENGINE" are displayed automatically in the multifunction display (A1p13). A warning signal also sounds.

Networking:
- The coolant temperature sensor (B11/4) changes its resistance corresponding to coolant temperature. The sensor has a negative temperature coefficient (NTC) resistance, i.e. the resistance reduces as temperature increases.
- The resistance of the coolant temperature sensor (B11/4) is read by the ME control unit (N3/10) or CDI control unit (N3/9).
- The motor electronics control unit (N3/10) or CDI control unit (N3/9) converts the resistance values of the coolant temperature sensor (B11/4) into a temperature value and places this on the Controller Area Network bus class C (engine compartment) (CAN-C).
- The instrument cluster (A1) reads in this temperature value from the CAN-C. The coolant temperature is shown in the multifunction display (A1p13) when called up.