C1631

Code No. C1631: ETACS 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 the ETACS-ECU via the CAN bus lines.

DIAGNOSTIC TROUBLE CODE SET CONDITIONS

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

PROBABLE CAUSES

- Malfunction of the CAN bus line

- Damaged connectors (ETACS-ECU)

- ETACS-ECU malfunction

- Malfunction of AWC-ECU

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 ETACS diagnostic trouble code. Electronic Time and Alarm Control System (ETACS)).

Q. Is the diagnostic trouble code set?

YES Perform the relevant troubleshooting.
NO Go to Step 3.
STEP 3. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.C1631 set?

YES Replace the AWC-ECU. (Refer to AWC-ECU Removal and Installation). Then go to Step 4.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions).
STEP 4. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.C1631 set?

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