Anti-Lock Braking System (ABS)

DTC U1415: Variant coding not implemented

CAUTION:
When the DTC U1415 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.
- The ABS-ECU stores the tire size information sent from the ETACS.

DTC SET CONDITIONS

This DTC is set when the tire size information is not coded to the ABS-ECU.

PROBABLE CAUSES

- Variant coding for ETACS-ECU has not been implemented.
- Malfunction of ABS-ECU.

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 2.
NO Repair the CAN bus lines CAN Bus Diagnostics Chart).
On completion, go to Step 4.
STEP 2. Using scan tool MB991958, check the other system DTC

Use scan tool to check that the DTC B222C is set in the ETACS-ECU.

Q. Is any DTC set?

YES Troubleshoot the relevant DTC, and then go to Step 4.
NO Go to Step 3.
STEP 3. Check whether the DTC is reset.

(1)Erase the DTC.

(2)Turn the ignition switch to the "LOCK" (OFF) position.

(3)Turn the ignition switch to the "ON" position.

Q. Is DTC U1415 set?

YES Replace the hydraulic unit (integrated with ABS-ECU) (Refer to Anti-Lock Braking System (ABS)).
Then go to Step 4.
NO If the trouble symptom is resolved, an intermittent malfunction such as poorly engaged connector(s) or wiring harness is suspected How to Cope With Intermittent Malfunctions).
STEP 4. Check whether the DTC is reset.

(1)Erase the DTC.

(2)Turn the ignition switch to the "LOCK" (OFF) position.

(3)Turn the ignition switch to the "ON" position.

Q. Is DTC U1415 set?

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