Porsche 928 Workshop Manual page 552

928
Ignition System
28
2.6 Plug connections on fuel injectors.
2.7 Plug connections on speed and reference
mark sensors.
TEST POINT 2
Power Supply for Electronic
Ignition Control Unit
1. Turn off ignition and pull off multiple-pin
plug on electronic ignition control unit.
2. Turn on ignition.
Measure voltage between
terminals 25 and 12.
2% 1. 11 II I, 20 ,v 8. II I* II I.
a a 77 8; ; ; ; ; ; ; ; ; ; 5
r
(Only connect tester with help of test
leads.)
Specification: battery voltage.
If value deviates, measure voltage on
connected plug X of central electric board
between terminal 3 and ground.
Specification: battery voltage.
PrintedinGermany VIII, 1984
Troubleshooting Electronic Ignition System
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