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DIAGNOSIS TSB Revision ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-243 Inspection Procedure 11: Abnormality in brake operation CAUTION • If there is any problem in the CAN bus lines, an incor- rect diagnostic trouble code may be set. Prior to this − CAN Bus Line Diagnostic Flow • Whenever ECU is replaced, ensure that the CAN bus lines are normal. • When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steer-
and . TECHNICAL DESCRIPTION (COMMENT) Although the cause of the trouble cannot be clearly resolved . PROBABLE CAUSES • Hydraulic unit (Integrated with ASC-ECU) malfunction • Malfunction of hydraulic circuit • Malfunction of brake assembly • Malfunction of brake booster • Malfunction of master cylinder assembly DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: M.U.T.-III USB Cable • MB991910: M.U.T.-III Main Harness A STEP 1. Using scan tool MB991958, check the diagnostic YES : Go to Step 2. (Refer to STEP 2. Hydraulic unit (Integrated with ASC-ECU) check ). Q: Is the check result normal? YES : Go to Step 3. brake lines, or replace the hydraulic unit (integrated ). |