Further To The Intake And Switch-Over Valves; Test Step "Intake Valve" Not Ok; Test Step "Switch-Over Valve" Not Ok - Porsche Boxster Technical Manual

45 Anti-lock brake system, diagnosis Boxster
8
Further to the intake and switch-over valves
(solenoid valves for ABD)
Solenoid valves not OK (function or leakage).
Note
A correct test on the ABD solenoid valves is
possible only if there is no fault on an ABS inlet
valve or ABS outlet valve.
Therefore, read out the fault memory beforehand
and remedy this fault first if necessary.
Test step "Intake valve" not OK 8
-Test sequence not observed.
-Function of the intake valves not OK.
-Return pump operation not OK.
Check pump operation. To do this, select re-
turn pump in the Drive links menu (pump
must then run).
-ABD secondary circuit poorly bled.
Bleeding, see Page 45 -D 43.
-Intake or switch-over valve leaks.
8
Test step "Switch-over valve" not OK
-Test sequence not observed.
-Function of the switch-over valve not
OK.
8
45 -D 38 45 02 Diagnosis/troubleshooting, ,anti-lock brake system
986D451 Printed in Germany -3, 1996