Porsche 928 Workshop Manual page 509

928
Ignition System
28
Sensor system good?
I
Y"
go to point 5.
"0
s Replace distributor.
a
11. Check voltage at ignition control unit plug
terminal 15 against ground. Voltage must be
same as battery voltage.
Voltage Correct>
Yes
1
I
"0
- Check voltage drop in line from ignition switch
to control unit. and eliminate voltage drop.
a
Primed in Germany - I. 1978
Troubleshooting Electronic Ignition System 28 -17