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DIAGNOSIS TSB Revision CONTROLLER AREA NETWORK (CAN) 54C-539 STEP 4. Using scan tool MB991958, diagnose the CAN bus (1) Disconnect intermediate connector C-29. CAUTION To prevent damage to scan tool MB991958, always turn the (2) Connect scan tool MB991958 to the data link connector. (4) Diagnose CAN bus lines, and check if the MUT-III screen is as shown in the illustration. (5) Turn the ignition switch to the "LOCK" (OFF) position. YES : If the MUT-III screen corresponds to the illustration, go to Step 23 . NO : If the MUT-III screen does not correspond to the illustration, go to Step 5. AC305231AI CONNECTOR: C-29 AC206894 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AC306075 : Red section on screen AB PCM METER -ECU ETACS -ECU AC-ECU SRS-ECU C.DISPLAY MUT J/C ABS-ECU |