Code No. C1290 CAN time-out error


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 (Refer to GROUP 54C, Trouble code diagnosis ).
  • If the diagnosis code No. C1290 is set in ASC-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnosis code may be set. In this case, the set diagnosis code is not highly reliable.
  • Before replacing the ECU, ensure that the communication circuit is normal.
  • When the diagnosis code No. C1290 is set in ASC-ECU, the diagnosis code for another system may also be set. When the diagnosis code for another system is set, carry out diagnosis for that system first.

OPERATION
ASC-ECU receives signals necessary for the operations of ABS, ASC, and TCL from the engine ECU, 4WD-ECU, ETACS-ECU, and the steering wheel sensor via the CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS
ASC-ECU receives signals necessary for the operations of ABS, ASC, and TCL from the engine ECU, 4WD-ECU, ETACS-ECU, and steering wheel sensor via CAN bus lines. This diagnosis code is stored when ASC-ECU cannot receive the signals necessary for the operations of ABS, ASC, and TCL from the engine ECU, 4WD-ECU, ETACS-ECU, and steering wheel sensor.

PROBABLE CAUSES

  • Engine ECU malfunction
  • 4WD-ECU malfunction
  • Steering wheel sensor malfunction
  • Malfunction of the CAN bus
  • ASC-ECU malfunction
  • Malfunction of ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 4.

STEP 2. M.U.T.-III diagnosis code
Check that the diagnosis codes U0100, U0101, U0114, U0126, and U0141 are set in ASC-ECU.

Q. Is the diagnosis code set?
Troubleshoot for the relevant diagnosis code (Refer to ).
Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code
Using M.U.T.-III, check if the diagnosis codes are set from the engine ECU, 4WD-ECU, ETACS-ECU, and steering wheel sensor or not.

Q. Is the diagnosis code set?
Troubleshoot the relevant diagnosis code, and then go to Step 4.
Go to Step 4.

STEP 4. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No. C1290 set?
Replace the ASC-ECU. Go to Step 5.
If the trouble symptom is resolved, an intermittent malfunction such as poorly engaged connector(s) or wiring harness is suspected (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 5. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No. C1290 set?
Return to Step 1.
This diagnosis is complete.