TCS or ASC

DTC U1415: Variant coding not completed

CAUTION:
^ If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
^ When diagnostic trouble code No. U1415 is set in ASC-ECU, the diagnostic trouble code may also be set in ETACS-ECU. When the diagnostic trouble code is set in ETACS-ECU, perform the diagnosis of the diagnostic trouble code for ETACS-ECU first.
^ When the hydraulic unit (integrated with ASC-ECU) is replaced, after turning the ignition switch ON and OFF (vehicle information from ETACS-ECU is registered), always perform the calibration of steering wheel sensor, G and yaw rate sensor, brake fluid pressure sensor, cut valve, and inlet valve.

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 A

STEP 1. Using scan tool MB991958, diagnose the CAN bus lines.
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 2.
NO: Repair the CAN bus lines. (Refer to Troubleshooting Can Bus Diagnostics Table.) After repairing the CAN bus line, go to Step 5.

STEP 2. Scan tool diagnostic trouble code for other system
Use scan tool to check that the diagnostic trouble code B222C is set in the ETACS-ECU.
Q: Is any DTC set?
YES: Perform troubleshooting for the diagnostic trouble code that is set. Then go to Step 4.
NO: Go to Step 3.

STEP 3. Check for diagnostic trouble codes
Q: Is DTC U1417 set?
YES: Perform the troubleshooting for diagnostic trouble code No. U1417. (Refer to U1417.)
NO: Go to Step 4.

STEP 4. Check whether the DTC is reset.
1) Ignition switch "LOCK" (OFF)
2) Ignition switch "ON"
3) Check that the ABS warning light is extinguished.
Q: Is DTC U1415 set?
YES: Replace the hydraulic unit (incorporates in ASC-ECU). Then go to Step 5.
NO: Intermittent malfunction.

STEP 5. Check whether the DTC is reset.
1) Ignition switch "LOCK" (OFF)
2) Ignition switch "ON"
3) Check that the ABS warning light is extinguished.
Q: Is DTC U1415 set?
YES: Return to Step 1.
NO: The procedure is complete.