BMW K100 LT Bedienungsanleitung PDF herunterladen (Seite 18)

Water temperature sensor:

The bike will not start if the water temperature is above the normal range of

operation. A bad temperature sensor will send the wrong signal to the EFI.

The water temperature sensor contains 2 resistors: 1 feeding the EFI and one feeding

the temperature switching unit. One resistor may be defective when the other one may

be OK. If only the one feeding the EFI is bad, you won’t see the temperature light

glowing. If the water temperature light stays on, and the engine doesn’t start, this is a

good indication of a bad temperature sensor.

If you suspect a problem with your water temperature sensor, here is what you should

read when testing it. Take a pot of water, immerse a thermometer. Plug your

ohmmeter to the sensor and have the tip of the sensor immersed in the water. Let the

water slowly warm up and get the value for every increase of 10

Celsius. The

following graphic shows you the expected values.

Because the Electronic ignition module send data to the LE-Jetronic (EFI), it may be

necessary to test both units.

The following testing show the results expected at the connector of both computers.

These testing are done at the female connectors and NOT at the computers pins.

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BMW K100 LT Bedienungsanleitung Seite 18