ASC

DTC U1415: Variant coding not completed

CAUTION:
^ If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ Whenever ECU is replaced, ensure that the CAN bus lines are normal.
^ When the diagnosis code No.U1415 is set in ASC-ECU, the diagnosis code may also be set in ETACS-ECU. When the diagnosis code is set in ETACS-ECU, carry out the diagnosis of the diagnosis code for ETACS-ECU first.
^ When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor.

CIRCUIT OPERATION
ASC-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.

DTC SET CONDITIONS
This diagnostic Trouble code is set when the variant coding for ETACS-ECU has not been completed.

PROBABLE CAUSES
^ Variant coding for ETACS-ECU has not been implemented.
^ ASC-ECU malfunction

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

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 ASC-ECU, and then go to Step 4.
NO: Intermittent malfunction.

STEP 4. 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: Go to Step 5.
NO: This diagnosis 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.