Code No. C1633: T/M Timeout


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis 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.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID .)

OPERATION


4WD-ECU communicates with CVT-ECU, A/T-ECU via the CAN bus lines.

DIAGNOSIS CODE SET CONDITION


This diagnosis code is set when the abnormality below is detected:

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code.
Check the CVT diagnosis code (Refer to GROUP 23A - Troubleshooting ) or the automatic transmission (FF) diagnosis code (Refer to GROUP 23C -Troubleshooting ).

Q. Is the diagnosis code set?
Perform the relevant troubleshooting.
Go to Step 3.

STEP 3. ETACS-ECU coding data check.
Check the transmission coding data stored in ETACS-ECU for any abnormality (Refer to GROUP 00 - Coding Reference Table ).

Q. Is the check result normal?
Go to Step 4.
Replace the ETACS-ECU. Then go to Step 5.

STEP 4. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1633 set?
Replace the 4WD-ECU (Refer to ). Then go to Step 5 .
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 5. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1633 set?
Return to Step 1.
This diagnosis is complete.