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 CAN Bus Line Diagnostics Flow).

- 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 (Refer to Testing and Inspection, Testing and Inspection and Testing and Inspection).

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 CAN Bus Diagnostics Chart).
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 Active Stability Control System (ASC)).
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

Coding List.

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 Electronic Time and Alarm Control System (ETACS)-ECU Removal and Installation), and then go to Step 7.
STEP 6. Check whether the diagnostic trouble code is reset.

Erase the DTC.

Q. Is DTC C2206 set?

YES Replace the hydraulic unit (integrated with ASC-ECU) (Refer to Active Stability Control System (ASC)), and then go to Step 7.
NO The procedure is complete.
STEP 7. Check whether the diagnostic trouble code is reset.

Erase the DTC.

Q. Is DTC C2206 set?

YES Return to Step 1.
NO The procedure is complete.