C1633

Code No. C1633: A/T CAN Data (not received)

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.

OPERATION

AWC-ECU communicates with A/T-ECU via the CAN bus lines.

DIAGNOSTIC TROUBLE CODE SET CONDITIONS

This diagnostic trouble code is set when the CAN signal of the A/T-ECU cannot be received.

PROBABLE CAUSES

- Malfunction of the CAN bus line

- Damaged connectors (A/T-ECU)

- Malfunction of A/T-ECU

- Malfunction of AWC-ECU

- Coding failure (installation of M/T for a vehicle with A/T specification, failure coding of A/T for a vehicle with M/T specification)

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.

Use scan tool to perform the CAN bus diagnosis.

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart).
STEP 2. M.U.T.-III diagnostic trouble code.

Check the A/T diagnostic trouble code. (Refer to Super All Wheel Control (S-AWC)).

Q. Is the diagnostic trouble code set?

YES Perform the relevant troubleshooting.
NO Go to Step 3.
STEP 3. ETACS-ECU coding data check.

Check the Transaxle coding data stored in ETACS-ECU for any abnormality. Programming and Relearning).

Q. Is the check result normal?

YES Go to Step 4.
NO Replace the ETACS-ECU. Electronic Time and Alarm Control System (ETACS)-ECU Removal and Installation). Then go to Step 5.
STEP 4. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.U0101 set?

YES Replace the AWC-ECU. (Refer to AWC-ECU Removal and Installation). Then go to Step 5.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions).
STEP 5. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.U0101 set?

YES Return to Step 1.
NO This diagnosis is complete.