Figure 8-48 Sample DLC Connection Diagram To open and set the DLC channel 1. Tap the right column of the channel D button at the bottom of the screen to open the setting dialog box. 2. Select the DLC Channel in the left column of the dialog box. 3. Swipe the Enable DLC channel to ON. Select the appropriate pins. Figure 8-49 Sample DLC Channel Setting Screen 1 4. Close the dialog box, the selected result is displayed on the screen.
Figure 8-50 Sample DLC Channel Setting Screen 2 Figure 8-51 Sample DLC Channel Setting Screen 3 5. Tap the DLC icon in the lower left corner of the screen to close the DLC channel.
Figure 8-52 Sample DLC Channel Setting Screen Trigger The trigger feature is used to stabilize repetitive waveforms to obtain a clear signal characterization. A trigger is activated when a signal crosses set thresholds. Trigger points can also be set manually as the user views a waveform. When the oscilloscope is capturing the signal, tap the left column of the Trigger button to activate the trigger function. A trigger point displays as a blue point.
Figure 8-53 Sample Trigger Point Screen When the oscilloscope is capturing the signal, tap the right column of the Trigger button to open the trigger settings dialog box. Figure 8-54 Sample Trigger Settings Screen Edge Triggering The edge trigger is one of the most common trigger modes and is activated when voltage rises above or falls below a preset threshold.
configure the trigger mode, threshold, trigger channel and pulse direction settings. Tap Done to save the settings or tap Cancel to exit without saving. Trigger Mode Four trigger modes are available: None, Auto, Repeat and Single. Figure 8-55 Sample Trigger Mode Screen The table below offers brief descriptions for each trigger mode. Table 8-4 Trigger Mode Table Trigger Mode Description None In this trigger mode, the oscilloscope can continuously capture data, without waiting for a trigger event.
Select the applicable trigger channel from the dropdown menu. The selected channel is the one that the oscilloscope monitors for the trigger condition. Figure 8-56 Sample Trigger Channel Screen Pulse Direction Two pulse direction settings are available: Rise and Fall. Figure 8-57 Sample Pulse Direction Screen Rising Edge Trigger - Indicates trigger is turned on to start the trace on the rising edge of the waveform.
Falling Edge Trigger – Indicates trigger is turned on to start the trace on the falling edge of the waveform Threshold The Threshold allows you to set the voltage threshold for the trigger. To precisely position the trigger point, input the value in the Threshold field in the trigger settings dialog box. To roughly position the trigger point, drag the trigger point to a desired position. To configure the trigger settings 1.
Figure 8-58 Sample Advanced Edge Screen Pulse Width This trigger type allows you to monitor pulses of a specified width. Figure 8-59 Sample Pulse Width Settings Screen To set the pulse width 1. Tap the Trigger button at the bottom of the screen to open the Trigger Settings dialog box.
2. Select the Pulse Width in the left column of the dialog box. 3. Select the desired trigger mode and channel mode. 4. Set the pulse direction to either Positive pulse or Negative pulse according to the polarity of the pulse. 5. Select one of the four Conditions: More than: triggers on pulses wider than the specified time. Less than: triggers on pulses narrower than the specified time. In the time range: triggers on pulses wider than Time 1 but narrower than Time 2.
Figure 8-60 Sample Buffer Screen Name Button Description Previous Tap to display the previous waveform in the buffer. Buffer Index Displays the number of the waveform currently displayed onscreen out of the total number of buffered waveforms. Next Tap to display the next waveform in the buffer. Time Base The time base controls the time interval across the oscilloscope display. Tap the Time Base button at the bottom to open the setting dialog box.
Measurement The available measurements for each channel are (from left to right): Figure 8-62 Sample Measurement Screen Maximum – the highest level that the signal reaches Minimum – the lowest level that the signal reaches Peak To Peak – the difference between maximum and minimum Amplitude – the top value minus the bottom value Period – the duration of one cycle in a repeated pattern in the waveform Frequency – the number of signal occurrences per second Positive Duty Ratio – the
Rising Rate – the rate at which the signal level rises Falling Rate – the rate at which the signal level falls Rise Time – the time the signal takes to rise from the lower threshold to the upper threshold Fall Time – the time the signal takes to fall from the upper threshold to the lower threshold X@Max – the corresponding value of X axis when the amplitude is the maximum X@Min – the corresponding value of X axis when the amplitude is the minimum Positive Acreage – the waveform
Figure 8-63 Sample Measurement Setting Screen 4. Close the dialog box, and the corresponding measurement readings are displayed on the right-hand side of the screen. Adjust the whole track or ruler track on the displayed screen or delete the measurement directly by tapping the X button.
8.1.6 Troubleshooting A. If the oscilloscope cannot communicate with the MaxiSys Tablet: Ensure the VCMI device is properly connected to the MaxiSys Tablet via Wi-Fi or with the supplied USB cable. Restart the MaxiSys Tablet and reconnect the VCMI device if communication between the two continues to fail. B. If unwanted signals are displayed or signals are distorted: Use only the supplied test leads or probes to connect with the input channels. Check the test leads or probes for damage.
Analog Bandwidth The frequency at which a displayed sine wave has half the power of the input sine wave (about 71% of the amplitude). Buffer Size/Cache Size The size of the oscilloscope’s buffer memory. The buffer memory is used by the oscilloscope to temporarily store data. This helps to compensate for the differences in data transfer rate from one device to another. Frequency The number of signal occurrences per second. Frequency is measured in Hz (hertz).
8.2 Multimeter Operation A multimeter is an electronic measuring instrument that is used to measure voltage, resistance, frequency, diode, duty cycle and pulse width and continuity test. The VCMI (Vehicle Communication and Measurement Interface) working with MaxiSys Ultra can function as a multimeter to provide precise measurements. 8.2.1 Safety Information Follow the instructions below to reduce the risk of injury from electric shock and prevent equipment damage.
Do not add voltage to the input terminal when measuring resistance. To avoid electric shock, turn off the power to the component before connecting. To prevent damage, always use and store your multimeter in appropriate environments. Do not use in wet or damp conditions, or around explosive gas or vapor. Do not tamper with or disassemble the multimeter, connectors or accessories. Internal damage will affect performance.
8.2.2.2 Technical Specifications Item Description Voltage Range ±200V Resistance Range 1Ω to 10MΩ Diode 2V Frequency Range 1Hz to 1MHz Duty Cycle Range %1 to 99% Pulse Width Range 10us to 1000ms Current Range 0 to 65A (65A current clamp) 0 to 650A (650A current clamp) 8.2.2.3 Accessories The following accessories are compatible with the multimeter and oscilloscope. Please refer to Accessories on page 107 for details.
The two multimeter test leads (Red: SA015 / Black: SA016) are standard for the multimeter and signal generator. Multimeter Test Lead Used to connect the multimeter and multimeter probe. 8.2.3 Getting Started Before opening the Multimeter application, ensure the VCMI device is connected to the tablet Wi-Fi or with the supplied USB cable. For more information, see Establish Vehicle Communication on page 20. Figure 8-1 Sample Connection Diagram To open the multimeter application 1.
NOTE Please check the multimeter LED status indicator on the front panel of VCMI device. The multimeter LED lights green when operating in the multimeter mode. 8.2.4 Multimeter Update The operating software of the multimeter is continually optimized. Tap the Help button in the upper half of the screen to update. Before update the multimeter software, please ensure the tablet has a stable Internet connection. 8.2.4.
Figure 8-3 Sample Update Confirmation Screen 3. Tap OK to update the software or tap Cancel to exit. 8.2.5 Screen Layout and Operations Tap the Measurement icon on the home screen then tap the Multimeter icon in the menu, the multimeter page displays. The screen typically includes the following button sections. NOTE The Multimeter application can also be opened via the Android home screen. Tap the Measure icon at the top of the Android home screen. Tap Multimeter icon.
Figure 8-4 Sample Multimeter Menu Screen 1. Upper Toolbar Buttons - see 8.2.5.1 Upper Toolbar Buttons on page 172 for details. 2. Main View Section – see 8.2.5.2 Main View Section on page 177 for details. 3. Lower Toolbar Buttons - see 8.2.5.3 Lower Toolbar Buttons on page 181 for details. 8.2.5.1 Upper Toolbar Buttons The upper toolbar buttons are used for configurations of various settings and operations.
Name Button Description File Print, open and save the waveform data. See File Menu on page 174 for more information. Help View the user manual, update the APK and firmware. See Help Menu on page 176 for more information. Reset Reset the digital readouts displayed in the figure mode. Multimeter Button This Multimeter status button displays the multimeter connection status. A green check mark means the tablet and the Multimeter are connected; a red X means the device and the tablet are not connected.
Figure 8-5 Sample Display Mode Menu Screen 2. Select one of the three display modes. 3. The corresponding display mode will be shown on the screen. Table 8-2 Display Mode Table Icon Mode Description Digital Mode Displays the digital readouts only. Waveform Mode Displays the waveform only. Digital + Waveform Mode Displays both the digital readouts and waveform. File Menu The file menu supports the following functions.
Figure 8-6 Sample File Menu Screen Print – Tap to create and print a temporary JPG picture of the current waveforms. NOTE Ensure the tablet is configure to print (see Printer setup instructions) and is connected to the printer. Ensure the tablet and printer share the same network. Waveform File Operation Save and open the waveform files in this section. Only Waveform mode and Digital + Waveform mode support this operation. Save Waveform – Tap to capture and save the current waveforms.
Configuration Operation The configurations can be saved and imported. Save the Configuration – Tap to save the configuration settings (i.e., the amplitude, the time base, the number of samples) of waveforms on the current screen. Import the Configuration – Tap to import the saved configuration settings for waveforms. Help Menu The Help Menu allows you to view the user manual, update the software, and view versions of the device.
Digital Mode The main view section in the digital mode displays only the digital readouts such as values of current measurement, maximum measurement, minimum measurement, peak to peak measurement and average measurement.
Figure 8-9 Sample Main View Section Screen (Waveform Mode) The main view section features a coordinate grid with the X-axis representing the time duration and the Y-axis representing the voltage level. The voltage level on the Y-axis can be configured in the Amplitude Settings while the time duration on the X-axis can be set in the Time Base Settings. Channel Selection In the main view section, a channel has two conditions: selected and unselected.
The X-axis and Y-axis can be zoomed using your fingertips. The waveform can be zoomed during or after capturing the signal. Measurement Rulers In the coordinate grid, there are two kinds of measurement rulers, which allow the voltage and time duration of a waveform to be measured precisely. They are useful when determining signal characteristics such as amplitude at specific points, the cycle time (duration) and frequency.
Figure 8-10 Sample Measurement Rulers Screen Zero Baseline The zero baseline is marked the 0 value in the Y-axis, showing the ground level of each channel waveform. After the channel is selected, the zero baseline can be adjusted by dragging the baseline marker up/down along the Y-axis, or dragging the waveform up/down or moving the screen up/down in the grid. NOTE Tap the baseline marker to make the vertical scale line thinner. In this case, the waveform is unselected and cannot be dragged.
Figure 8-12 Sample Wiring Diagram and Help Screen To open and close the Wiring Diagram and Help window 1. Tap the arrow button on the right-hand side of the screen. Figure 8-13 Arrow Button Position Screen 2. The Wiring Diagram and Help window displays. 3. Tap the arrow button again or tap any space outside of the window.
Digital + Waveform Mode In this mode, the main view section displays the digital readouts on the top and the waveform in the grid. Figure 8-14 Sample Main View Section Screen (Digital + Waveform Mode) 8.2.5.3 Lower Toolbar Buttons The measurement, buffer and time base can be configured in the lower toolbar. Table 8-3 Lower Toolbar Buttons Name Button Description Measure Tap to select an appropriate measurement. See Measure Setting on page 181 for more information.
Measure Setting This multimeter can be used to measure or test AC voltage, DC voltage, resistance, AC electricity, DC electricity, diode, frequency, duty cycle, pulse width, continuity and period.
Figure 8-15 Sample Measure Setting Position Screen 2. Select the measure type you want to measure or test in the right column of the dialog box. The blue color indicates the option is selected. Figure 8-16 Sample Measure Setting Screen 3. Close the dialog box, the measure type you set displays on the screen. Amplitude Setting Amplitude value can be configured for the selected measurement type excluding resistance measurement.
The amplitude settings allow you to set up the multimeter to capture signals within the specified range. If the input signal exceeds the selected range, an over-range indicator will be displayed. Select Auto to enable the device to adjust the vertical scale automatically. There are two modes available to set the amplitude value. Mode 1: For example, selecting AC 1V sets the amplitude to Voltage 1V (displays on the amplitude button). The vertical scale range is from -1V to +1V.
Figure 8-18 Sample Amplitude Setting Screen (AC 2.0V/div) Testing Procedures The following section describes how to use the multimeter. The testing procedures are the same for each measurement type. The following directions are for measuring AC voltage. To measure AC voltage 1. Tap the Measure Setting button in the lower left corner of the screen to open the setting dialog box. Select AC voltage in the dialog box. 2. Set the proper amplitude value in the Amplitude Setting menu in the same dialog box.
Probe Edit Use the probe edit menu to add the not included robes into the probe menu. Figure 8-19 Sample Probe Edit Screen 1 To add custom probes 1. Tap the Measure Setting button in the lower left corner of the screen to open the setting dialog box. 2. Select the Probe Edit option in the left column of the dialog box. 3. Tap each field to open the virtual keyboard and input the required information.
Figure 8-20 Sample Probe Edit Screen 2 4. Tap Add to save the settings, or tap Clear to exit without saving. 5. The added probe will be listed in the Measure Settings window. Figure 8-21 Sample Probe Edit Screen 3 Buffer The waveform buffer displays the number of the waveform currently displayed on-screen out of the total number of stored waveforms. The multimeter can capture and store up to 32 waveforms. Tap the Previous or Next button to review waveforms.
Figure 8-22 Sample Buffer Screen Name Button Description Previous Tap to display the previous waveform in the buffer. Buffer Index Displays the number of the waveform currently displayed onscreen out of the total number of buffered waveforms. Next Tap to display the next waveform in the buffer. 8.2.6 Troubleshooting If the multimeter cannot communicate with the MaxiSys Tablet: Check if the VCMI device is properly connected to the MaxiSys Tablet via Wi-Fi or the supplied USB cable.
8.2.7 Glossary AC Alternating Current - electrical current that switches polarity at regular intervals. DC Direct Current - electrical current that flows in one direction only. Amperage The strength of an electric current, expressed in amperes. Amplitude The maximum voltage generated from the zero volts line of the multimeter. Frequency The number of signal occurrences per second. Frequency is measured in Hz (hertz). Duty Cycle The length of a signals on time.
8.3 Signal Generator Operation The VCMI (Vehicle Communication and Measurement Interface) working with MaxiSys Ultra can function as a signal generator to send out electric signals to the vehicle’s sensor or actuator for testing or measuring. 8.3.1 Safety Information Follow the instructions below to reduce the risk of injury from electric shock and prevent equipment damage. Use the signal generator only as specified in this manual.
8.3.2 General Introduction 8.3.2.1 Component Locations The multimeter jacks are used when operating the signal generator. The two multimeter jacks are located on the top of the VCMI device. VCMI Top View 1. Multimeter Jacks – for ground and signal cables 2. USB Port 3. Hook 4. DC Power Supply Input Port 5. Power Button 8.3.2.2 Technical Specifications Item Description Voltage Range 0.1 to 12V Frequency Output 1Hz to 30KHz Duty Cycle Range 1% to 99% (1Hz to 30KHz) Accuracy 3% 8.3.2.
Large Dolphin Small Crocodile Multimeter Back-pinning Clip Clip Probe Probe Breakout Lead Battery Clip Flexible Back-pinning Probe The multimeter test leads (Red: SA015 / Black: SA016) are standard for the signal generator and multimeter. Multimeter Test Lead Used to connect the signal generator and the probe. 8.3.3 Getting Started Before opening the Signal Generator application, the VCMI device must be connected to the Tablet via the provided USB cable or Wi-Fi network.
Figure 8-1 Sample Connection Diagram To open the signal generator application 1. Insert the multimeter test lead ends into the multimeter jacks on the top of the VCMI device to compete the connection. 2. Tap the Measure icon on the Home screen of the MaxiSys Ultra Tablet. The Measurement screen displays. 3. Tap the Signal Generator icon to open the signal generator Menu. 4. Select a test to continue. NOTE Please check the signal generator LED status indicator on the front panel of VCMI device.
NOTE The acronym APK (Android Package Kit) is used on the tablet and in this manual. This file contains all the assets of a particular app. To update the APK, is to install the latest version of the app on your tablet. To update the APK 1. Tap the Help button on the upper half of the screen. A dropdown menu displays. Figure 8-2 Sample Help Screen 2. Tap the Update the APK in the dropdown menu. A confirmation message displays.
Figure 8-3 Sample Update Confirmation Screen 3. Tap OK to update the software or tap Cancel to exit. 8.3.5 Screen Layout and Operations Tap the Measurement icon on the home screen and select Signal Generator from the menu, the signal generator page displays. The screen typically includes the following button sections. NOTE The Signal Generator application can also be opened via the Android home screen. Tap the Measure icon at the top of the Android home screen. Tap Signal Generator icon.
Figure 8-4 Sample Signal Generator Menu Screen 1. Upper Toolbar Buttons - see 8.3.5.1 Upper Toolbar Buttons on page 196 for details. 2. Main View Section – see 8.3.5.2 Main View Section on page 199 for details. 3. Lower Toolbar Buttons - see 8.3.5.3 Lower Toolbar Buttons on page 202 for details. 8.3.5.1 Upper Toolbar Buttons The upper toolbar buttons are used to configure settings and operations. The following table provides brief descriptions of each button.
Name Button Description Help View the user manual, update the software and view version numbers. See Help on page 198 for more information. Reset Reset the configurations and refresh the screen. Signal Generator Button This Signal Generator Icon displays the signal generator connection status. A green check mark means the tablet and the signal generator are connected; a red X means the device and the tablet are not connected.
Figure 8-5 Sample File Menu Screen Print – Tap to create and print a temporary JPG picture of the current waveforms. NOTE Ensure the tablet is configure to print (see Printer setup instructions) and is connected to the printer. Ensure the tablet and printer share the same network. Save Waveform – Tap to capture and save the current waveform. On the Save File screen, tap each item to input the corresponding information and then tap Save or Save Default to finish.
Figure 8-6 Sample Help Menu Screen User Manual – displays instruction for the prosper use of the signal generator. Update the APK – connects to the Autel server and check for latest application software. About – displays the model numbers of the signal generator and the installed versions of the software and firmware. 8.3.5.2 Main View Section The main view section screen displays as a coordinate grid with X-axis and Y-axis, representing the duration and voltage level respectively.
Waveform Zooming The zooming function allows you to change the size and position of a signal during or after capturing a waveform to examine it in greater details. It does not change the stored data, only the way it displays. The X-axis and Y-axis can be zoomed using your fingertips. The waveform can be zoomed during or after capturing the signal. Measurement Ruler In the coordinate grid, there are two types of measurement rulers, which allow the voltage and duration of a waveform to be measured precisely.
Zero Baseline The zero baseline is marked as the 0 value in the Y-axis, showing the ground level of each channel waveform. After the channel is selected, the Zero Baseline can be adjusted by dragging the zero baseline marker up/down along the Y-axis. Wiring Diagram and Help Tap the arrow button in the lower right corner of the screen to open the Wiring Diagram and Help window. The Wiring Diagram function provides the connection diagram, operation steps and operation notes.
Figure 8-9 Arrow Button Position Screen 2. The Wiring Diagram and Help window displays. 3. Tap the arrow button again or tap any space outside of the window. 8.3.5.3 Lower Toolbar Buttons The waveform mode, voltage, frequency and duty cycle can be configured via the lower toolbar buttons. Table 8-2 Lower Toolbar Buttons Name Button Description Waveform Mode Setting Tap to select an appropriate waveform mode. See Waveform Mode Setting on page 203 for more information.
Waveform Mode Setting The signal generator supports numerous waveform modes including the DC voltage, square wave, square wave (X+Y), triangle wave, and actuators drive, and arbitrary waveform.
Set the DC voltage in the signal generator interface. The signal generator can simulate the signals of numerous sensors including the water temperature sensor, oil pressure sensor and position sensor and then feed back to the engine ECU.
Square Wave Figure 8-13 Sample Square Wave Connection Diagram Once the voltage and frequency are set in the signal generator interface, the square wave signals simulate the signals of various Hall sensors.
This function is mainly used to simulate the missing tooth signals of Hall-type crankshafts and camshafts. The X value represents the normal tooth signal and the Y represents the missing tooth signal. The default setting is 58+2, which can be adjusted as needed. Triangle Waveform Figure 8-15 Sample Triangle Waveform Connection Diagram This is a symmetrical triangular waveform, which is mainly used to simulate the triangle wave signals. The amplitude and frequency can be configured in this waveform.
Arbitrary Waveform Figure 8-16 Sample Arbitrary Waveform Connection Diagram Any type of the mentioned waveforms can be loaded again after the waveform and parameter settings are saved. Voltage Setting After you select the waveform mode, you can also set the amplitude value for that mode. There are three methods to adjust the voltage value: Method 1: Tap the “+” and “-” buttons on the bottom of the screen in the Voltage Setting.
Figure 8-17 Sample Voltage Setting Screen 1 Range Button Description Raises the voltage by 0.1V 0.1V to 0.9V Lowers the voltage by 0.1V Raises the voltage by 1V 1V to 12V Lowers the voltage by 1V Method 2: Tap the Voltage Setting button at the bottom of the screen to open a dialog box. Adjust the voltage value by tapping the positive or negative value at the bottom of the dialog box. Then tap OK to confirm or Cancel to exit without saving.
Figure 8-18 Sample Voltage Setting Screen 2 Value Description +0.1V Raises the voltage by 0.1V -0.1V Lowers the voltage by 0.1V +1.0V Raises the voltage by 1V -1.0V Lowers the voltage by 1V Method 3: Input the voltage value using the virtual keyboard. Tap the voltage field to clear the current value and input the new value. Tap OK to confirm or Cancel to exit without saving.
Figure 8-19 Sample Voltage Setting Screen 3 Frequency Setting When the waveform mode is selected and the signal generator is operating, you can also set the frequency value for that mode. There are also three methods to adjust the frequency value: Method 1: Tap the “+” and “-” buttons on the bottom of the screen in the Frequency Setting.
Figure 8-20 Sample Frequency Setting Screen 1 Range Button Description Raises the frequency by 1Hz 1Hz to 10Hz Lowers the frequency by 1Hz Raises the frequency by 10Hz 10Hz to 100Hz Lowers the frequency by 10Hz Raises the frequency by 100Hz 100Hz to 1000Hz Lowers the frequency by 100Hz Raises the frequency by 1KHz 1.0KHz to 30.0KHz Lowers the frequency by 1KHz Method 2: Tap the Frequency Setting button at the bottom of the screen to open a dialog box.
Value Description +1.0Hz Raises the frequency by 1Hz -1.0Hz Lowers the frequency by 1Hz +10.0Hz Raises the frequency by 10Hz -10.0Hz Lowers the frequency by 10Hz +1.0KHz Raises the frequency by 1KHz -1.0KHz Lowers the frequency by 1KHz +10.0KHz Raises the frequency by 10KHz -10.0KHz Lowers the frequency by 10KHz Method 3: Input the frequency value using the virtual keyboard. Tap the frequency field to clear the current value and input the new value.
Duty Cycle Setting When the waveform mode is set, you can also set the duty cycle ratio for that mode. There are three methods to adjust the duty cycle ratio: Method 1: Tap the “+” and “-” buttons on the bottom of the screen in the Duty Cycle Setting. Figure 8-23 Sample Duty Cycle Setting Screen 1 Range Button Description Raises the duty cycle ratio by 1% 1% to 99% Lowers the duty cycle ratio by 1% Method 2: Tap the Duty Cycle Setting button at the bottom of the screen to open a dialog box.
Figure 8-24 Sample Duty Cycle Setting Screen 2 Value Description +1.0% Raises the duty cycle ratio by 1.0% -1.0% Lowers the duty cycle ratio by 1.0% +10.0% Raises the duty cycle ratio by 10% -10.0% Lowers the duty cycle ratio by 10% Method 3: Input the duty cycle ratio using the virtual keyboard. Tap the duty cycle field to clear the current value and input the new value. Tap OK to confirm or Cancel to exit without saving.
Figure 8-25 Sample Duty Cycle Setting Screen 3 8.3.6 Troubleshooting If the signal generator cannot communicate with the MaxiSys Tablet: Check if the VCMI device is properly connected to the MaxiSys Tablet through the supplied USB cable. IMPORTANT To avoid damaging the vehicle and/or the equipment, all vehicle communications must be terminated before resetting the connection. The Internet connection may be aborted during resetting.
Waveform Type Square Wave Description A non-sinusoidal Sample Waveform periodic waveform with the duty cycle of 50% Square Wave (X+Y) A special square waveform with normal and missing teeth signals Triangle Wave A asymmetrical triangular waveform 201
8.4 OBDII Communication Line Inspection Operation The VCMI (Vehicle Communication and Measurement Interface) working with MaxiSys Ultra is designed with the OBDII communication line inspection function by checking the ON-OFF lamps on the tablet screen. Generally, the vehicle’s electronic control systems are designed to comply with the specific communication protocols. The control units in the electronic control systems communicate with the Tablet through the OBDII (DLC) adapter.
8.4.2 General Introduction 8.4.2.1 Component Locations The main connectors are located on the bottom of the VCMI device. 1. Ethernet Connector 2. Vehicle Data Connector 3. Input Channel A 4. Input Channel B 5. Input Channel C 6. Input Channel D 8.4.3 Getting Started Before opening the OBDII Communication Line Inspection application, you have to complete three steps below: 1) Connect the VCMI device to the Tablet via Wi-Fi or the supplied USB, see Establish Vehicle Communication on page 20.
Figure 8-1 Sample Connection Diagram To open the OBDII Communication Line Inspection application 1. Please refer to Figure 8-1 Sample Connection Diagram to complete the connection. Place the ignition in the key on position. 2. Tap the Measure icon on the Home screen of the MaxiSys Ultra Tablet. The Measurement screen opens. 3. Tap the OBD icon to open the OBDII Communication Line Inspection Menu. 4. Select a communication protocol to test. 8.4.
