Attention - Launch EM101 Manual

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connector, and use Resistance to test the resistance between the two terminals of the sensor. Its
resistance value is inversely proportional to the temperature (negative temperature coefficient) and
should be less than 1kΩ during warm-up.
Single piece check: disconnect the coolant temperature sensor wire connector, remove the sensor from
the engine, place the sensor into the water in the beaker, heat the water in the beaker, and use
Resistance to test the resistance between the two terminals of the sensor under different water
temperature conditions. Compare the measured value with the standard value. If the standard value is
not met, the coolant temperature sensor should be replaced.
(2) Detect coolant temperature sensor output signal voltage
Install the coolant temperature sensor, insert the sensor wire connector, turn on the ignition switch, and
test the sensor output voltage signal between the two terminals of the coolant temperature sensor wire
connector. The measured voltage value should vary inversely with the coolant temperature. When the
coolant temperature sensor harness is disconnected and the ignition switch is on, the voltage should be
about 5V.

4.3 Attention

1. Before usage, please reset APP value on the multimeter to zero.
2. The tip of the test pen is metal, do not touch it with hands during measurement, otherwise it might
cause electric shock and affect measurement results.
3. Before test, please check measurement range and socket into which the test pen is inserted, perform
test after checked with no error.
4. If it is unable to estimate measured value, choose max measurement range, and shift to suitable
range based on measured results.
5. It is strictly forbidden to shift measurement range when measuring high voltage or large
current, as it can cause electric arc to burn switch contact. If you want to change range, please
disconnect metal contact tip first.
6. To avoid instrument damage, it is strictly forbidden to measure resistance when tested
circuit is powered on.
7. When you want to measure DC current with multimeter, please reset it to zero first, then select
suitable measurement range. Current varies in different modules, please refer to module mark to shift
measurement range. During measurement, connect the multimeter in series, and measure circuit one
by one. The bypass voltage can be disconnected. Please be aware that parallel connection of
multimeter is forbidden, as it can cause multimeter damage and personnel injury.
EM101N New Energy Oscillograph Multimeter User Manual
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