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DTC U1417: Variant coding value invalid (includes faulty installation)
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Line Diagnostic Flow ).
  • If diagnostic trouble code No.U1417 is set in ASC-ECU, always diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect diagnostic trouble code may be set. In this case, the set diagnostic trouble code is not highly reliable.
  • Before replacing the ECU, ensure that the communication circuit is normal.
  • When diagnostic trouble code No.U1417 is set in ASC-ECU, the diagnostic trouble code may also be set in ETACS-ECU. When the diagnostic trouble code is set in ETACS-ECU, carry out the diagnosis of the diagnostic trouble code for ETACS-ECU first.
  • When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor (Refer to , and ).
 
 
CIRCUIT OPERATION
ASC-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.
 
 
 
DTC SET CONDITIONS
ASC-ECU communicates with ETACS-ECU via CAN bus lines. This diagnostic trouble code is set when the vehicle information received from the ETACS-ECU is invalid.
 
 
 
PROBABLE CAUSES
  • ETACS-ECU malfunction
  • Engine control module malfunction
  • ETACS-ECUs have been interchanged between two vehicles.
  • ASC-ECU malfunction
  • External noise interference
  • ASC-ECUs have been interchanged between two vehicles.
 
 
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
Use scan tool to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ). On completion, go to Step 2.
 
STEP 2. DTC recheck after resetting CAN bus lines
Is DTC U1417 set?
Go to Step 3.
The procedure is complete.
 
STEP 3. Using scan tool MB991958, other system DTC
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.
Is any DTC set?
Troubleshoot for the relevant diagnostic trouble code.
Go to Step 4.
 
STEP 4. ETACS-ECU coding data check
Refer to GROUP 00 - Precautions before Service/Coding List .
Is the check result normal?
Go to Step 5.
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ), and then go to Step 7.
 
STEP 5. Engine control module coding data check
Refer to GROUP 00 - Precautions before Service/Coding List .
Is the check result normal?
Go to Step 6.
Replace the engine control module (Refer to GROUP 13A - ECM <2.0L Engine> or GROUP 13C - ECM <2.4L Engine>), and then go to Step 7.
 
STEP 6. Check part number of ETACS-ECU
Check the part number of ETACS-ECU.
Is the check result normal?
Go to Step 7.
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ), and then go to Step 7.
 
STEP 7. Check part number of ASC-ECU
Check the part number of ASC-ECU.
Is the check result normal?
Go to Step 8.
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 9.
 
STEP 8. Check whether the diagnostic trouble code is reset.
Erase the DTC.
Is DTC U1417 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 9.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
 
STEP 9. Check whether the diagnostic trouble code is reset.
Erase the DTC.
Is DTC U1417 set?
Return to Step 1.
The procedure is complete.