Coolant Temperature

Coolant temperature












The coolant temperature gauge provides the driver with information on the engine coolant temperature. The coolant temperature gauge receives power and is controlled from the main instrument unit.

The temperature sensor is connected to Trionic, which sends continuous information on the bus concerning the coolant temperature. The main instrument unit receives information on the coolant temperature via the bus.

The coolant temperature gauge's scale is divided into 5 fixed breakpoints. The main instrument unit is programmed to move the gauge needle to the fixed breakpoints at certain specific temperatures to give a steady reading at normal coolant temperatures.

The following breakpoints are programmed in the main instrument unit (factory setting):

Gauge needle: Coolant temperature
-into "blue" zone 30 ° C (fixed value)
-out of "blue" zone 50 ° C
-into "horizontal" position 80 ° C
-out of "horizontal" position 115 ° C
-into "red" zone 129 ° C
-out of "red" zone 130 ° C (fixed value)

Diagnostics
A break/short circuit generates diagnostic trouble code B1715 and the coolant temperature sensor bottoms.