DTC U1415: Variant coding not implemented: Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus lines. 

   Use scan tool to diagnose the CAN bus lines.

   Q: Is the check result normal? 

   1. YES:  Go to Step 2.
   2. NO:  Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTICS TABLE ). On completion, go to  Step 4.
2. STEP 2. Using scan tool MB991958, check the other system DTC. 

   Use scan tool to check that the DTC B222C is set in the ETACS-ECU.

   Q: Is any DTC set? 

   1. YES:  Troubleshoot the relevant DTC, and then go to  Step 4.
   2. NO:  Go to Step 3.
3. STEP 3. DTC recheck after resetting CAN bus lines 
   1. Erase the DTC.
   2. Turn the ignition switch from "LOCK" (OFF) to "ON" and hold it for 1 minute, and turn it from ON to "LOCK" (OFF) and hold it for 1 minute. Then, turn the ignition switch from "LOCK" (OFF) to "ON".
   3. Check if the DTC is set.

   Q: Is the DTC U1415 set? 

   1. YES:  Go to Step 4.
   2. NO:  This diagnosis is complete.
4. STEP 4. 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 the electric power steering-ECU (Refer to ELECTRIC POWER STEERING CONTROL UNIT (EPS-ECU)  ). Then go to Step 5
   2. NO:  Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .
5. STEP 5. 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:  Return to  Step 1.
   2. NO:  This diagnosis is complete.