Coolant temperature sensors 1 and 2
| Coolant temperature sensors 1 and 2 |
Coolant temperature sensor 1 and 2 are of the NTC type and are located on top of the heater.
Coolant temperature sensor 1 is only in contact with the coolant while coolant temperature 2 also is in contact with the combustion chamber cover and can thus very quickly sense if there are any malfunctions in the coolant flow through the heater.
| Diagnostics |
In case of shorting to ground in the circuit for coolant temperature sensor 1, diagnostic trouble code B0453 is generated.
In case of an open circuit or shorting to B+ in the circuit for coolant temperature sensor 1, diagnostic trouble code B0457 is generated.
In case of shorting to ground in the circuit for coolant temperature sensor 2, diagnostic trouble code B0458 is generated.
In case of an open circuit or shorting to B+ in the circuit for coolant temperature sensor 2, diagnostic trouble code B0462 is generated.
In case of overheating, diagnostic trouble code B0481 is generated.
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