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DIAGNOSIS TSB Revision WIRELESS CONTROL MODULE (WCM) 42C-71 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. Using scan tool MB991958, read the satellite radio YES : Troubleshoot the satellite radio. (Refer to GROUP 54B, Diagnosis <Satellite radio tuner>.) NO : Go to Step 3. STEP 3. Using scan tool MB991958, read the other system YES : Go to Step 4. ZC501967 AC404789 AC701411AB MB991824 MB991827 MB991910 Data link |