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DIAGNOSIS <TC-SST> TSB Revision TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST) 22C-261 DTC P1873: Clutch 1 System (Pressure abnormality) CAUTION • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be • Whenever the ECU is replaced, ensure that the CAN bus lines are normal. . DIAGNOSTIC FUNCTION TC-SST-ECU checks that the clutch 1 pressure is . DESCRIPTIONS OF MONITOR METHODS The clutch 1 pressure is determined to be abnormal. . PROBABLE CAUSES • Malfunction of TC-SST-ECU DIAGNOSTIC PROCEDURE Required Special Tools: • MB991958 Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) STEP 1. Scan tool CAN bus diagnostics YES : Go to Step 2. Troubleshooting .) After repairing the CAN bus line, go to Step 2. STEP 2. Scan tool diagnostic trouble code. Q: Is the DTC set? YES : Perform the relevant troubleshooting. STEP 3. Check whether the DTC is reset. YES : Replace the clutch assembly. (Refer to GROUP 22D .) After replacing the clutch assembly, go to Step 4. NO : Intermittent malfunction. (Refer to GROUP 00 − How to Cope with Intermittent Malfunction .) |