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. 

   Using scan tool MB991958, 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 ). After repairing the CAN bus line, go to Step 2.
2. STEP 2. DTC recheck after repairing the CAN bus line 

   Q: Is DTC U1417 set? 

   1. YES:  Go to Step 3.
   2. NO:  This diagnosis is complete.
3. STEP 3. Check for diagnostic trouble codes 

   Check if diagnostic trouble code No. C121C is set in ASC-ECU.

   Q: Is the check result normal? 

   1. YES:  Perform troubleshooting for the diagnostic trouble code that is set (Refer to DTC C121C: TORQUE REQUEST SIGNAL REJECTION  ).
   2. NO:  Go to Step 4.
4. STEP 4. Scan tool diagnostic trouble code for other systems 

   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 any DTC set? 

   1. YES:  Perform troubleshooting for the diagnostic trouble code that is set.
   2. NO:  Go to Step 5.
5. STEP 5. ETACS-ECU coding data check 

   Using the scan tool, check if there is any abnormality to the following coding data stored in the ETACS-ECU (Refer to CODING LIST ).

   Vehicle line 

   OK: LANCER EVO 

   Transaxle 

   OK (Vehicles without TC-SST): 5MT 

   OK (Vehicles with TC-SST): TC-SST 

   Engine type 

   OK: D4 V.V.T. 2.0L TC 

   Engine power 

   OK: Normal 

   Chassis Type for A.S.C. 

   OK: Type 1 

   Final drive 

   OK: AWD FF Base 

   Transfer 

   OK: ACD 

   SAS 

   OK: Present 

   AWD 

   OK: Not present 

   TCM 

   OK (Vehicles without TC-SST): Not present 

   OK (Vehicles with TC-SST): Present 

   ACDAYC 

   OK: Present 

   Q: Is the check result normal? 

   1. YES:  Go to Step 6.
   2. NO:  Replace the ETACS-ECU (Refer to ETACS-ECU ). Then go to  Step 10.
6. STEP 6. Engine control module coding data check 

   Using the scan tool, check if there is any abnormality to the coding data stored in the engine control module (Refer to CODING LIST ).

   Q: Is the check result normal? 

   1. YES:  Go to Step 7.
   2. NO:  Replace the engine control module (Refer to ENGINE CONTROL MODULE ). Then go to  Step 10.
7. STEP 7. Check of ETACS-ECU part number 

   Check the part number of ETACS-ECU.

   Q: Is the check result normal? 

   1. YES:  Go to Step 8.
   2. NO:  Replace the ETACS-ECU (Refer to ETACS-ECU ). Then go to  Step 10.
8. STEP 8. Check of ASC-ECU part number 

   Check the part number of ASC-ECU.

   Q: Is the check result normal? 

   1. YES:  Go to Step 9.
   2. NO:  Replace the hydraulic unit (integrated with ASC-ECU) (Refer to HYDRAULIC UNIT  ). Then go to  Step 10.
9. STEP 9. 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  ). Then go to Step 10.
   2. NO:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
10. STEP 10. 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.