Gearbox oil temperature sensor, AF 40 (535)
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Gearbox oil temperature sensor, AF 40 (535)
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The temperature sensor is mounted in the gearbox valve housing.
To inform the control module if the current temperature. The value is used to correct the PWM ratio to the solenoids so that the gear changes are not affected by the viscosity of the oil. It is also used to activate the special gearchange program in case of overheating.
The sensor comprises an NTC resistor built into a plastic casing. The NTC resistor characteristics mean the resistance drops as the temperature rises.
The NTC resistor is supplied with 5V through a pull up from control module pin 8 and is grounded through pin 7.
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Pin no.
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Interface
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Description
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8
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Temperature signal
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Temperature signal
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7
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ground
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