Porsche 928 Workshop Manual page 607

928 S4
928 GT Fuel System, Electronic Injection
28
Test point Title
EZK ignition system
Page
a
EZK-Diagnosis/Troubleshooting
PrInted I" Germany - xxv, 13scl
D28-1
Effect of faults (checklist) ...............................................................................................
3
Fault memory.. ................................................................................................................
4
Connections
to plugs, EZK control unit ........................................................................ 4
Idle speed contact ..........................................................................................................
5
Full load contact ............................................................................................................. 6
Engine temperature
sensor II ......................................................................................... 7
Idle and full load contact.. ..............................................................................................
7
Load signal.. ...................................................................................................................
.7
Transmission protection
switch ..................................................................................... 7
Knock sensor I ................................................................................................................
8
Knock sensor II. .............................................................................................................. 9
Control unit (knock sensor) ........................................................................................... 9
Hall signal. .......................................................................................................................
9
Control unit faulty ......................................................................................................... 10
Permanent power supply ............................................................................................. 10
Engine speed/reference
mark transmitter. ..................................................................
11
Ignition circuit monitoring
........................................................................................... 12
Ignition system - output stages ...................................................................................
12
Leads K and L ...............................................................................................................
15