TROUBLE SHOOTING GUIDE 11. A. MECHANICAL TROUBLE SHOOTING GUIDE Diagnostic trouble shooting guide General remark: Always refer UDS Questionnaire for Diagnostic trouble shooting. Whenever there is an error (DTC) detected by the transmission electronics (TCU), the warning lamp on the dashboard will be activated or flashing. When reading out the DTCs with the tester tool and a P-code is found, first check if this P-code is a sporadic fault, that did not occur in the last driving cycle (Should be indicated with an „H“ from History). If so, just delete the FC and check if it does not come back. If not a sporadic fault, but currently active (Should be indicated with a „C“ from Currently), folow the action steps described below for each error code. Always check if the latest software is present. • If not flash to the latest TCU software and check the fault codes again. • FAULT ACTION Leak from gearbox oil pan gasket 1. Ensure oil pan bolts are correctly tightened 2. Replace oil pan gasket 3. Replace drain plug 4. Replace oil pan complete Leak from gearbox drain plug 1. Ensure plug is correctly tightened 2. Replace drain plug 3. Replace oil pan complete Leak from shift drum seal Replace shift drum seal Leak from input shaft Replace input shaft seal Leak from differential oil seal(s) Replace differential oil seals Leak from plug Replace Plug Leak from oil cooler 1. Measure the bolts torque 2. Change oil cooler seal gasket 3. Measure the plug torque 4. Change oil cooler Dual Clutch Transmission (DCT) 67
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