Porsche 944 - Manual (Page 136)

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Fuel System - Electronic Control 944 S/944 S2
Precautions
Greater demands of modern engines on the ignition systems and a desire for freedom from
maintenance had led to the introduction of electronic ignition systems in standard production
some time ago already. Normally the ignition power of electronic systems (almost all makes)
will be greater than that of conventional systems and evan greater power can be expected in
the future. This places electronic ignition systems in a power range, where touching current
carrying parts or terminats could be dangerous to lite (both primary and secondary circuits).
In conjunction with this matter we must point out that there must always be conformance with
safety regulations and legislation of a pertinent country when working on or testing ignition
systems. The ignition (ignition or source of power) must always be switched off when working
on the ignition system.
Sample Jobs:
Connecting engine testers, for example:
timing light, dwell angle/speed tester, oscilloscope, etc..
Replacing ignition components, for example:
spark plugs, ignition coil, distributor, ignition leads, etc..
The above mentioned dangerous voltage will be present in the entire system should it be
necessary to switch on the ignition for ignition tests or engine adjustments.
Consequently there is not onty danger on the various components of an ignition system (such
as, for example, distributor, ignition coil, control units, ignition tackle), but also on wire
harnesses, plug connections and testers.
D 24/28 - 2 DME - Diagnosing/Troubleshooting
Printed In Germany - XXI, 1989