Kärcher ICC 1 S D Service Manual page 27

ICC 1 S D
Engine – Cooling
Checking engine coolant temperature switch
1 Plug-in connector
2 Engine coolant temperature switch (S3)
Basic Settings and Service Procedures
Checking engine coolant temperature
switch
– Start engine.
– If the "Engine Coolant Temperature" indicator
light on the combination instrument illuminates
also when the engine is cold, the connecting
cable must be checked for a short-circuit
against vehicle ground.
– With engine running, bridge the connector
(1) to vehicle ground (indicator lamp must
illuminate and buzzer must sound).
– Replace temperature switch (2) as required.
Note:
A radiator that is blocked by dirt and debris
will cause overtemperature of engine
coolant and hydraulic fluid. Therefore, when
the indicator lamp illuminates, the first step
to be taken should be to investigate the
radiator for free air passage.
When the indicator lamp lights up, the engine
will not be shut off.
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