Bosch MTS 5200 LAB SCOPE Manual page 68

BOSCH MTS 5200 LAB SCOPE
Presented by Bob Pattengale
LIVE VEHICLE TESTING (SECONDARY IGNITION COP LOOP)
You can see in the screen capture above that the scope has been set up with the trigger point on
the leading edge of the waveform. Also note that the Time/Div has been increased giving more
resolution to the pattern for easier viewing.
One of the first things we notice is that the pattern is no longer in multi strike and has gone to a
single ignition strike. If there was a misfire in this engine, this is where you would see it. This
pattern indicates that the ignition coil is firing good and there is no fault.
This is where you need to start capturing the waveforms and saving them to the PC. Doing this
over time will give you a great reference database that you can call upon if you have a similar
vehicle in your bay that may or may not have a misfire. You can use a good known pattern from
your database and compare it to the vehicle in your bay and determine if the vehicle has a
problem or not.
68
1-800-71-TRAIN (1-800-718-7246) OR www.auto-video.com
NOTES