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, CAN Bus Diagnostics Table .).
  • 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.
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • 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 .).
  • 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



DIAGNOSIS CODE SET CONDITION



PROBABLE CAUSES



  • Engine ECU malfunction
  • CVT-ECU malfunction
  • 4WD-ECU malfunction
  • AS&G-ECU malfunction
  • Steering wheel sensor malfunction
  • Malfunction of the CAN bus
  • ASC-ECU malfunction
  • Malfunction of ETACS-ECU
  • ETACS-ECUs have been interchanged between two vehicles.

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 - CAN Bus Diagnostics Table .). On completion, go to Step 6.

STEP 2. M.U.T.-III diagnosis code
Check that the diagnosis codes U0100, U0101, U0114, U0126, U0141 and U1004 are set in ASC-ECU.

Q. Is the diagnosis code set?
Troubleshoot for the relevant diagnosis code (Refer to .). Then go to Step 6.
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, CVT-ECU, 4WD-ECU, ETACS-ECU, AS&G-ECU and steering wheel sensor or not.

Q. Is the diagnosis code set?
Troubleshoot the relevant diagnosis code, and then go to Step 6.
Go to Step 4.

STEP 4. ETACS-ECU coding data check
Refer to GROUP 00 - Coding List .

Q. Is the check result normal?
Go to Step 5.
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU .), and then go to Step 6.

STEP 5. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.C1290 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to .). Then go to Step 6.
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 Malfunctions .).

STEP 6. Check whether the diagnosis code is reset.

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