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Presented by Bob Pattengale
BOSCH MTS 5200 LAB SCOPE
1-800-71-TRAIN (1-800-718-7246) OR www.auto-video.com
LIVE VEHICLE TESTING (SECONDARY IGNITION COP LOOP)
Many times on vehicles that have COP ignition systems it is difficult to spot a misfire at idle.
Normally misfires on COP ignition vehicles occur when the vehicle is running down the road. To
detect misfires while driving the vehicle we want to use a COP loop.
The COP loop is a cable that works much like the COP wand except the end has an adjustable
loop that can be slipped around an ignition wire or an ignition coil and secured without having to
be held by your hand.
In order to get the loop around an ignition coil, you need to unplug the coil harness connector
from the coil, slip the loop around the coil, then reconnect the coil harness connector to the coil.
After connecting the loop to the coil you need to find a suitable ground connection for the ground
clamp such as the negative battery terminal. Make sure that when you run your wires into the
vehicle that they are not in contact with any moving parts or a part that gets extremely hot. This
could cause damage to the cables.
