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.
1) Turn the ignition switch to the "ON" position.
2) Turn the ignition switch to the "OFF" position.
3) Check that the ABS warning light goes out when the ignition switch is turned to the "ON" position.

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. Ensure that the ABS warning light is off.
1) Turn the ignition switch to the "ON" position.
2) Turn the ignition switch to the "OFF" position.
3) Check that the ABS warning light goes out when the ignition switch is turned to the "ON" position.

Q: Is the check result normal?
YES: Go to Step 5.
NO: The procedure is complete.

STEP 5. Check whether the diagnostic trouble code is reset.
Q: Is DTC U1415 set?
YES: Return to Step 1.
NO: The procedure is complete.