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X-431 Throttle User Manual
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9.3 Sensor Simulation
9.3.1 Connections
1. Firstly, power the X-431 Throttle tablet on.
2. Plug one end of the sensor test cable (black) into the “COM” interface of the
sensorbox, and then the other end to the test probe or electronic control
converting cable.
3. Connect one end of the sensor test cable (red) into the “V
Ω
Hz” interface of
the sensorbox, and then the other end to the test probe or electronic control
converting cable.
Note: Choose corresponding cables and test probes according to different terminals.
9.3.2 Simulation test
Simulation test enables users to exactly judge if the sensor is good or not to
avoid replacing components blindly. For example, the trouble code indicates the
fault is in water temperature sensor itself. But we need to confirm whether the
fault results from water temperature sensor or the connections between ECU
and sensors, or ECU itself. In this case, we can make full use of simulation test
to input the signal of simulating water temperature sensor, instead of water
temperature sensor, to the microcomputer. If the engine works better and the
fault vanishes, the fault is in the water temperature sensor. If the fault still occurs,
input the signal to the corresponding terminals of ECU. Consequently, if the fault
disappears, the fault lies in the connection between water temperature sensor
and ECU, otherwise, the fault exists in ECU.
After all connections are properly made (refer to Chapter 9.3.1 for details),
launch X-431 Throttle application and enter the Job menu interface, then tap
“Toolbox” -> “Sensor” to enter the test selection screen. See Fig. 9-2.
