C2206

DTC C2206: Re-execution of variant coding

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 CAN Bus Line Diagnostics Flow ).
- If the diagnostic trouble code C2206 is set in ASC-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnostic trouble code may be set. In this case, the set diagnostic trouble code is not highly reliable.
- Before replacing the ECU, ensure that the communication circuit is normal.
- When the diagnostic trouble code C2206 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, carry out the diagnosis of the diagnostic trouble 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 (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 communicates with ETACS-ECU via CAN bus lines. This diagnostic trouble code is set if the vehicle information stored in ETACS-ECU varies from the one stored when the ignition switch was last turned on.

PROBABLE CAUSES

- ETACS-ECU or ASC-ECU which was equipped with other vehicle is used.
- Malfunction of ETACS-ECU
- ASC-ECU malfunction
- External noise interference

DIAGNOSIS

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 2.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.) On completion, go to Step 7.
STEP 2.Using scan tool MB991958, diagnostic trouble code

Check that the diagnostic trouble code U1415 or U1417 is set in ASC-ECU.

Q. Is DTC U1415 or U1417 set?

YES Troubleshoot for the relevant diagnostic trouble code (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

Programming and Relearning.

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.

(1)Erase the DTC.

(2)Ignition switch: "LOCK" (OFF) position

(3)Ignition switch: "ON" position

Q. Is DTC C2206 set?

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

(1)Erase the DTC.

(2)Ignition switch: "LOCK" (OFF) position

(3)Ignition switch: "ON" position

Q. Is DTC C2206 set?

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