ABS

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

CAUTION
^ If DTC U1417 is set in ABS-ECU, always diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect DTC may be set. In this case, the set DTC is not highly reliable.
^ Before replacing the ECU, ensure that the communication circuit is normal.
^ When DTC U1417 is set in ABS-ECU, the DTC may also be set in ETACS-ECU. When the DTC is set in ETACS-ECU, carry out the diagnosis of the DTC 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 DTC 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. DTC 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 DTC
Use scan tool to check whether the ETACS-ECU-related or engine ECU-related DTC is set or not.

Q: Is any DTC set?
YES: Troubleshoot for the relevant DTC.
NO: Go to Step 4.

STEP 4. Check coding data

Q: Is the check result normal?
YES: Go to Step 5.
NO: Replace ETACS-ECU. Then go to Step 7.

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 hydraulic unit (ABS-ECU). Then go to Step 7.

STEP 6. Check whether the DTC is reset.

Q: Is DTC U1417 set?
YES: Replace the hydraulic unit (ABS-ECU). Then go to Step 7.
NO: The procedure is complete.

STEP 7. Check whether the DTC is reset.

Q: Is DTC U1417 set?
YES: Return to Step 1.
NO: The procedure is complete.