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DIAGNOSIS TSB Revision ELECTRONIC CONTROL AWD 27C-75 DIAGNOSIS STEP 1. Scan tool MB991958 CAN bus diagnostics YES : Go to Step 2. − Troubleshooting/CAN Bus Diagnostics Table ). Then go to Step 4. STEP 2. Scan tool MB991958 DTC of other systems YES : Troubleshoot the relevant diagnostic trouble code, and then go to Step 4. NO : Go to Step 3. STEP 3. Check whether the DTC is reset. the "ON" position. (3) Check if the DTC is set. YES : Replace AWD-ECU (Refer to ). Then go to Step 4 . NO : The trouble can be an intermittent malfunction such as loose connector fit, wiring harness open circuit − How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ). STEP 4. Check whether the DTC is reset. YES : Diagnose again from Step 1. |