Checking Ignition Coils (M73)

Checking Ignition Coils (M73)


CAUTION!

Switch off ignition.







Connect DIS Tester to diagnosis socket.
Select "Measurement".
Select "Preset measurements".
On cylinder bank 1-6, ignition oscilloscope is triggered by ignition lead of cylinder 1.
On cylinder bank 7-12, ignition oscilloscope is triggered by ignition lead of cylinder 7.

Disconnect spark plug connector on cylinder (1 or 7). Connect special tool 12 7 030 to spark plug and spark plug connector of cylinder (1 or 7). Do not connect ground cable.
Connect trigger pliers to special tool 12 7 030.
Remove ignition lead (terminal 4) from ignition coil (on corresponding cylinder bank) and fit special tool 61 2 010.
Connect KV pliers to special tool 61 2 010.