C2206

DTC C2206 Re-execution of variant coding

CAUTION
^ If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to Diagnostic trouble code diagnosis Diagnostic Trouble Code Descriptions).
^ Before replacing the ECU, ensure that the communication circuit is normal.
^ When DTC C2206 is set in ASC-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.
^ 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.

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

DTC SET CONDITIONS
ASC-ECU compares the last vehicle information received from ETACS-ECU with the previous vehicle information. If they do not match, ASC-ECU sets this DTC.

PROBABLE CAUSES
^ ETACS-ECUs have been interchanged between two vehicles.
^ Malfunction of ETACS-ECU
^ Malfunction of ASC-ECU
^ External noise interference

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.
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines (Refer to Diagnosis - CAN Bus Diagnostic Table CAN Bus Diagnostics Table). On completion, go to Step 2.

STEP 2. DTC recheck after resetting CAN bus lines
Check if DTC U1415 or U1417 is also set.
Q: Is DTC U1415 or U1417 set?
YES: Perform troubleshooting for the diagnostic trouble code that is set. (Refer to Diagnostic Trouble Code Descriptions)
NO: Go to Step 3.

STEP 3. Using scan tool MB991958, diagnostic trouble code of other systems
Use scan tool to check that the vehicles information-related DTC is set by the ETACS-ECU.
Q: Is any DTC set?
YES: Troubleshoot the relevant diagnostic trouble code, and then go to Step 7.
NO: Go to Step 4.

STEP 4. ETACS-ECU coding data check
Q: Is the check result normal?
YES: Go to Step 6.
NO: Go to Step 5.

STEP 5. ETACS-ECU variant coding
Perform the variant coding to the ETACS-ECU.
Q: Does variant coding succeed?
YES: Go to Step 7.
NO: Replace the ETACS-ECU and then go to Step 7.

STEP 6. Check whether the diagnostic trouble code is reset.
Q: Is DTC C2206 set?
YES: Replace the hydraulic unit (incorporates in ASC-ECU), and then go to Step 7.
NO: The procedure is complete.

STEP 7. Check whether the diagnostic trouble code is reset.
Q: Is DTC C2206 set?
YES: Return to Step 1.
NO: The procedure is complete.