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How to diagnose CAN Bus with a multimeter. In this video we install various faults and diagnose them with the voltmeter. This High Speed CAN Bus voltage check is very easy and simple. CAN Bus fault diagnostics can be difficult; we break it down in to easy steps to help you improve your automotive diagnostics. We look at the voltages you might expect for short circuit and open circuit CAN Bus faults. This is equivalent to the test I perform with Master Technicians on CAN Bus Technical Training!!
PART 1 Here: [ Ссылка ]
I prefer to use an oscilloscope for my CAN Bus diagnostics (PicoScope 2204A), but the Fluke meter is a good tool if used correctly.
Buy My PicoScope set up: [ Ссылка ]
Link to PicoScope Waveforms: [ Ссылка ]
00:00 How to identify CAN bus faults with multimeter voltage
0:41 Don't try this at home!
0:54 CAN low short to ground voltage reading
1:48 CAN high short to ground voltage reading
2:18 How to identify which CAN line is short to ground
2:38 CAN bus shorted to 12 volts positive
3:33 How to identify which CAN line is short to positive
4:40 CAN bus shorted together
4:13 CAN low open circuit voltage
5:05 CAN high open circuit voltage
5:46 How to identify an open circuit on CAN bus with a multimeter
USA Links:
Fluke multimeter - [ Ссылка ]
Cheap Autoranging multimeter - [ Ссылка ]
UK Links:
Fluke multimeter - [ Ссылка ]
Cheap Autoranging multimeter - [ Ссылка ]
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Video Links:
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4 CAN Bus Faults Diagnosed - [ Ссылка ]
CAN Bus Multimeter Test - [ Ссылка ]
5 Easy Oscilloscope Tips - [ Ссылка ]
Quick Misfire Check - [ Ссылка ]
