Porsche 928 Workshop Manual page 617

28
Fuel System I Electronic Control
92854
928 GT
Fault, Fault Code
Possible Causes. Elimination. Remarks
Test point 11
Control unit faulty
Fault code 2-33
If this fault occurs, renew control unit
Test
point
12
Permanent power
SUPPlY
EZK control unit (V)
a) Permanent positive (B+) If B + is not present
the fault memory is erased
Test procedure:
At the control unit plug, connect the voltmeter with terminals 18 (-)
and 35 (+) by means of the test leads.
Display : battery voltage
No display: check according to wiring diagram
b) Power supply through EZK relay
At the control unit plug, connect the voltmeter by means of the test
leads to terminals 18 (-) and 29 (+). Switch on the ignition.
Display: battery voltage
No display: check according to wiring diagram
35 36 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
---------------em
------------------
ltl 17 16 15 lb 13 12 11 10 9 I3 7 6 5 4 3 2 1
4
D28-10
EZK-Diagnosis/Troubleshooting
0
PrInted In
Germany
- Xxv, 1.990