Porsche 928 Workshop Manual page 531

928
Ignition System
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- Dangerous voltage points (400 V - 25 kV)
2. Wiring Diagram
1 - Electronic ignition control unit
2 - Engine temperature sensor (double NTC)
3 - Intake air temperature sensor
4 ~ Speed and reference mark sensors
5 ~ Throttle switch
6 ~ Power supply relay
7 ~ Final stages
8 - Distributor
9 - Ignition coils
10 - Ignition switch
11 - Battery
A - Ground -control unit (right valve cover below blowoff switching valve)
E - Ground -final stages (near right ignition coil - looking forward)
C - Activation - LH-Jetronic
D -To LH-Jetronic
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Printed in Germany
VIII, 1984
Cautions When Repairing 28-39
Electronic Ignition Systems