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DIAGNOSIS TSB Revision KEYLESS OPERATION SYSTEM (KOS) 42B-107 STEP 1. Using scan tool MB991958, diagnose the CAN bus CAUTION To prevent damage to scan tool MB991958, always turn the Scan Tool (M.U.T.-III) (2) Turn the ignition switch to the "ON" position. YES : Go to Step 2. ). STEP 2. Recheck for diagnostic trouble code. position. (3) Check if DTC is set. YES : Replace KOS-ECU and register the ID codes. (Refer to NO : The trouble can be an intermittent malfunction (Refer to GROUP 00 − How to use Troubleshooting/inspection Service Points − How to Cope with Intermittent Malfunction ZC501967 AC404789 AC701411AB MB991824 MB991827 MB991910 Data link |