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DTC U1415 Variant coding not implemented
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • When DTC U1415 is stored in the AWD-ECU, the diagnostic trouble code may also be stored in ETACS-ECU. When the diagnostic trouble code is stored in ETACS-ECU, carry out the diagnosis of the diagnostic trouble code for ETACS-ECU first.
 
 
OPERATION
AWD-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.
 
 
DIAGNOSTIC TROUBLE CODE SET CONDITIONS
This diagnostic trouble code is stored when the variant coding for ETACS-ECU has not been implemented.
 
 
PROBABLE CAUSES
Current trouble
  • AWD-ECU malfunction
  • Variant coding for ETACS-ECU has not been implemented.
  • Wiring harness or connector failure in the CAN bus lines between ETACS-ECU and AWD-ECU
Past trouble
  • AWD-ECU DTC U1415 has not been erased.
 
 
DIAGNOSIS
STEP 1. Scan tool MB991958 CAN bus diagnostics
Use scan tool MB991958 to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting/CAN Bus Diagnostics Table ). Then go to Step 4.
 
STEP 2. Scan tool MB991958 DTC of other systems
Use M.U.T.-III to check that DTC B222C is stored in the ETACS-ECU.
Is the DTC stored?
Troubleshoot the relevant diagnostic trouble code, and then go to Step 4.
Go to Step 3.
 
STEP 3. Check whether the DTC is stored again.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is stored.
Is DTC U1415 stored?
Replace AWD-ECU (Refer to ). Then go to Step 4.
The trouble can be an intermittent malfunction such as loose connector fit, wiring harness open circuit (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
 
STEP 4. Check whether the DTC is stored again.
Is DTC U1415 stored?
Diagnose again from Step 1.
This procedure is complete.