ABS

DTC U1415: Variant coding not implemented

CAUTION: When the diagnostic trouble code U1415 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.
^ The ABS-ECU stores the tire size information sent from the ETACS.

DTC SET CONDITIONS
This diagnostic trouble code 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. 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 2.
NO: Repair the CAN bus lines. On completion, go to Step 4.

STEP 2. M.U.T.-III other system diagnostic Trouble code
Use scan tool to check that the diagnostic trouble code B222C is set in the ETACS-ECU.
Q: Is any DTC set?
YES: Troubleshoot the relevant diagnostic Trouble code, and then go to Step 4.
NO: Go to Step 3.

STEP 3. Check whether the diagnostic Trouble code is reset.
Q: Is DTC U1415 set?
YES: Replace the ABS-ECU. 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.

STEP 4. Check whether the diagnostic Trouble code is reset.
Q: Is DTC U1415 set?
YES: Return to Step 1.
NO: The procedure is complete.