DTC U1415: Variant coding not implemented: Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: V.C.I.
  • MB991827: USB Cable
  • MB991910: Main Harness A

1. STEP 1. Scan tool MB991958 CAN bus diagnostics 

   Use scan tool MB991958 to diagnose the CAN bus lines.

   Q: Is the check result normal? 

   1. YES:  Go to Step 2.
   2. NO:  Repair the CAN bus line (Refer to CAN BUS DIAGNOSTICS TABLE ). Then go to  Step 4.
2. STEP 2. Scan tool MB991958 DTC of other systems 

   Use M.U.T.-III to check that the DTC B222C is set in the ETACS-ECU.

   Q: Is the DTC set? 

   1. YES:  Troubleshoot the relevant diagnostic trouble code, and then go to  Step 4.
   2. NO:  Go to Step 3.
3. STEP 3. Check whether the DTC is reset. 
   1. Erase the DTC.
   2. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
   3. Check if the DTC is set.

   Q: Is the DTC U1415 set? 

   1. YES:  Replace AWD-ECU (Refer to AWD-ECU  ). Then go to Step 4.
   2. NO:  The trouble can be an intermittent malfunction such as loose connector fit, wiring harness open circuit (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
4. STEP 4. Check whether the DTC is reset. 

   Q: Is the DTC U1415 set? 

   1. YES:  Diagnose again from  Step 1.
   2. NO:  This procedure is complete.