Functional Description

Functional Description

The temperature of the engine coolant is shown continuously by the special analogue indicator and if the temperature is too high, the driver is alerted by the "maximum coolant temperature" warning light.

The engine coolant temperature sender and maximum temperature contact L10 (for TD and T.SPARK Version up to April '98) is fitted on the engine head and comprises a thermistor which generates a signal proportionate with the temperature of the fluid and a contact that closes to earth when the fluid temperature is too high. The first signal is sent to the instrument cluster C10 at pin 6, while the second is sent to pin 14 of connector A.

For the Boxer version the sender L7 and the thermal contact L5 are separate, but their function and electrical connection are the same.

For the JTD version and T.SPARK version from May '98, the transmitter L7 sends a signal proportionate with the temperature (the same signal is sent to the i.e. control unit S11, which supplies the maximum temperature signal to the cluster (from pin 49 connector C).

The fuel level sender L9 is a sensor submerged in the fuel tank. Its resistance changes with the changing level in the tank changes.

An earth signal reaches pin 1 of L9, while a signal proportionate with the level is sent from pin 2, through fusebox G1, to the instrument cluster C10, at pin 11 of connector B.

For M1.5.5 injection the fuel level transmitter is integrated in the pump unit P18.

Inside the fuel level gauge an electronic device selects the signal corresponding to reserve and turns on the corresponding warning light.

The minimum oil pressure contact L2, also fitted on the crankcase, closes when the pressure falls below a certain limit sending an earth signal to the instrument cluster C10 at pin 9 of connector A, thereby turning on the "low oil pressure" warning light.

For some Model Year '98 cars an electronic damper N83 has been inserted which corrects the signal of the fuel level transmitter P18 which differs from the one described here.