DTC U1417: Variant Coding Value Invalid (Includes Faulty Installation): 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

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 3.
   2. NO:  Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTICS TABLE ). On completion, go to Step 2.
2. STEP 2. DTC recheck after resetting CAN bus lines 

   Q: Is DTC U1417 set? 

   1. YES:  Go to Step 3.
   2. NO:  The procedure is complete.
3. STEP 3. Using scan tool MB991958, other system diagnostic trouble code 

   Use scan tool to check whether any diagnostic trouble code related to vehicles information is set or not by the ETACS-ECU or engine control module (ECM).

   Q: Is the DTC set? 

   1. YES:  Troubleshoot for the relevant DTC.
   2. NO:  Go to Step 4.
4. STEP 4. ETACS-ECU coding data check 

   Refer to CODING LIST .

   Q: Is the check result normal? 

   1. YES:  Go to Step 5.
   2. NO:  Replace the ETACS-ECU (Refer to ETACS-ECU ), and then go to  Step 7.
5. STEP 5. Engine control module (ECM) coding data check 

   Refer to CODING LIST .

   Q: Is the check result normal? 

   1. YES:  Go to Step 6.
   2. NO < 2.0L engine non-turbo >:  Replace the engine control module (ECM) (Refer to DIAGNOSTIC TROUBLE CODE CHART ), and then go to  Step 7.
   3. NO < 2.0L engine turbo >:  Replace the engine control module (ECM) (Refer to DIAGNOSTIC TROUBLE CODE CHART ), and then go to  Step 7.
   4. NO < 2.4L engine >:  Replace the engine control module (ECM) (Refer to DIAGNOSTIC TROUBLE CODE CHART ), and then go to  Step 7.
6. STEP 6. Check the part number of ETACS-ECU 

   Check the part number of ETACS-ECU.

   Q: Is the check result normal? 

   1. YES:  Go to Step 7.
   2. NO:  Replace the ETACS-ECU (Refer to ETACS-ECU ), and then go to Step 7.
7. STEP 7. Check the part number of ASC-ECU 

   Check the part number of ASC-ECU.

   Q: Is the check result normal? 

   1. YES:  Go to Step 8.
   2. NO:  Replace the hydraulic unit (integrated with ASC-ECU) (Refer to HYDRAULIC UNIT  ), and then go to  Step 9.
8. STEP 8. Check whether the DTC is reset. 

   Erase the DTC.

   Q: Is DTC U1417 set? 

   1. YES:  Replace the hydraulic unit (integrated with ASC-ECU) (Refer to HYDRAULIC UNIT  ), and then go to Step 9.
   2. NO:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
9. STEP 9. Check whether the DTC is reset. 

   Erase the DTC.

   Q: Is DTC U1417 set? 

   1. YES:  Return to  Step 1.
   2. NO:  The procedure is complete.