Solenoid Valve, Torque Converter Clutch - Porsche Boxster Technical Manual

Boxster Tiptronic diagnosis 37
8
Fault, DTC Possible causes, elimination, notes
Test point 26
Solenoid valve, torque Fault effect:
converter clutch
0
"
V
h
Torque converter clutch always open.
pen circul sort
to ground 1. Check ATF level (refer to Page 37 -A 12) and erase the fault mem-
DTC 70 ory.
2. Perform a test drive and read out the fault memory.
Note
8 Diagnosis conditions for fault detection:
-Torque converter clutch activated.
-No engine speed fault, spider shaft speed fault, transmission ratio
fault or pressure regulator 4 fault entered as present.
-Gear or 4 or 5.
-No shifting operation taking place.
3. If the fault recurs after the test drive and no other faults are stored,
the following fault possibilities can be present:
-Electrical activation of pressure regulator 4 not OK (diagnostic
trouble codes 83 and 55 present?).
8 -Mechanical defect in pressure regulator 4.
-ATF supply to the torque converter clutch not OK.
-Converter defective.
8
37 01 Diagnosis/troubleshooting, Tiptronic 37 -D 41
Printed in Germany -3, 1996 98637D21
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