Porsche 928 Workshop Manual page 1284

39
Differential, transaxle system
926
Fault, DTC
Possible causes, remedy, notes
4. Check connections at ground wire (1) and plus wire (2) (contact re-
sistance).
Bridge terminals 30 and 87 at the relay base and check whether volt-
age is present at the connection point (3).
If voltage is present (but the return pump is not running): Replace
the hydraulic unit (defective return pump).
D39 - 246
0
PSD diagnosisfkoubleshooting
Printed in Gemuny - xxxv, ,996