LAUNCH X-431 Throttle User Manual
78
compliant with the standard, then the coolant temperature sensor shall be
replaced.
(2) Output signal voltage testing for coolant temperature sensor
After installing the coolant temperature sensor, plug the wire connector of
sensor, and then switch ignition ON, test the output signal voltage between the
two terminals of wire connector. The tested voltage shall be in inverse
proportional with the coolant temperature. When the harness of coolant
temperature sensor is disconnected, the voltage shall be about 5V if the ignition
switch is ON.
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