LAUNCH X431 GDS Sensorbox Manual
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simulating water temperature sensor, instead of water temperature sensor,
input signal to the microcomputer by simulation function. If the engine work
better and the fault symptom disappears, so the fault is in the water
temperature sensor. If the fault symptom still occurs, import the signal by
ECU port. Now, if the fault symptom disappears, the fault is in the connection
between water temperature sensor and ECU; if the fault symptom still occurs,
the fault is in ECU.
After connected each harness of sensor (refer to Chapter 3.1 for the detailed
info), power on then enter into the function menu interface, click "Sensor
simulation" to display the main testing menu as shown on Figure 3-1.
Fig.3-1
3.2.1 DC voltage simulation
As on Figure 3-1, select [DC voltage simulation], then click [Enter] button, the
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