Advanced Automotive Fault Diagnosis
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LÔØI NOÙI ÑAÀU, ledklok
- Điều hướng trang này:
- MOT emissions (annual UK test)
| Symptom analysis
This allows direct access to specific tests relating to reported driveability problems. Waveforms A comprehensive range of digitised waveforms can be displayed with colour highlights. The dis- play can be frozen or recalled to look for intermit- tent faults. A standard lab scope mode is available to allow examination of EFI (electronic fuel injec- tion) or ABS traces for example. Printouts can be made from any display. An interesting feature is ‘transient capture’ which ensures that even the fastest spikes and intermittent signals are captured and displayed for detailed examination. Adjustments Selecting specific components from a menu can make simple quick adjustments. Live readings are displayed appropriate to the selection. MOT emissions (annual UK test) Full MOT procedure tests are integrated and dis- played on the screen with pass/fail diagnosis to the department of transport specifications for both gas analysis and diesel smoke if appropriate options are fitted. The test results include engine rev/min and oil temperature as well as the gas readings. These can all be printed for garage or customer use. The connections to the vehicle for standard use are much the same for most equipment manu- facturers. These are listed as follows. Connection Purpose or one example of use Battery positive Battery and charging voltages Battery negative A common earth connection Coil positive To check supply voltage to coil Coil negative (adapters To look at dwell, rev/min and for DIS – distributorless primary waveforms ignition systems) Coil HT lead clamp Secondary waveforms (adapters are available for DIS) Number one cylinder Timing light and sequence of plug lead clamp waveforms Battery cable amp clamp Charging and starting current Oil temperature probe Oil temperature (dip stick hole) Vacuum connection Engine load Figure 3.12 shows a digital oscilloscope engine analyser. This test equipment has many features as listed previously and others such as the following. ● tải về 7.07 Mb. Chia sẻ với bạn bè của bạn:
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