Anti-Lock Braking System (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. Using scan tool MB991958, diagnose the CAN bus line.

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 CAN Bus Diagnostics Chart).
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. Using scan tool MB991958, check the 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

Programming and Relearning.

Q. Is the check result normal?

YES Go to Step 5.
NO Replace ETACS-ECU Electronic Time and Alarm Control System (ETACS)-ECU Removal and Installation).
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) (Refer to Anti-Lock Braking System (ABS)).
Then go to Step 7.
STEP 6. Check whether the DTC is reset.

Erase the DTC.

Q. Is DTC U1417 set?

YES Replace the hydraulic unit (integrated with ABS-ECU) (Refer to Anti-Lock Braking System (ABS)).
Then go to Step 7.
NO The procedure is complete.
STEP 7. Check whether the DTC is reset.

Erase the DTC.

Q. Is the DTC U1417 set?

YES Replace the hydraulic unit (integrated with ABS-ECU) (Refer to Anti-Lock Braking System (ABS)).
Then go to Step 8.
NO The trouble can be an intermittent malfunction
STEP 8. Check whether the DTC is reset.

Erase the DTC.

Q. Is the DTC U1417 set?

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