ABS

DTC U1417: Invalid variant coding value (including wrong assembly)

CAUTION
^ If diagnostic trouble code U1417 is set in ABS-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 U1417 is set in ABS-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.

CIRCUIT OPERATION
ABS-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.

DTC SET CONDITIONS
ABS-ECU communicates with ETACS-ECU via CAN bus lines. This diagnostic trouble code is set when there is difference between the vehicle information from the ETACS-ECU and the vehicle information stored in the ABS-ECU.

PROBABLE CAUSES
^ Malfunction of ETACS-ECU
^ ETACS-ECUs have been interchanged between two vehicles.
^ ABS-ECU malfunction
^ ABS-ECUs have been interchanged between two vehicles.

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

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. On completion, go to Step 2.

STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Q: Is DTC U1417 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. M.U.T.-III other system diagnostic trouble code
Use scan tool to check whether the ETACS-ECU-related diagnostic trouble code is set or not.
Q: Is any DTC set?
YES: Troubleshoot for the relevant diagnostic trouble code.
NO: Go to Step 4.

STEP 4. Check coding data
Refer to Coding List.
Q: Is the check result normal?
YES: Go to Step 5.
NO: Replace ETACS-ECU.

STEP 5. Check part number of ABS-ECU
Check the part number of ABS-ECU.
Q: Is the check result normal?
YES: Go to Step 6.
NO: Replace the ABS-ECU.

STEP 6. Check whether the diagnostic trouble code is reset.
Q: Is DTC U1417 set?
YES: Replace the ABS-ECU.
NO: The procedure is complete.