Code No. U1195: Coding not completed


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 - Troubleshooting ).
  • If diagnosis codes U1195 is set in ASTC-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 assembly (integrated with ASTC-ECU) is replaced, always carry out the calibration of the steering wheel sensor and the G sensor (Refer to ).

OPERATION


This diagnosis code will be set when the variant coding for the ETACS-ECU has not been implemented.

DIAGNOSIS CODE SET CONDITIONS


This diagnosis code is set when the variant coding for ETACS-ECU has not been implemented.
PROBABLE CAUSES

DIAGNOSIS PROCEDURE

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

Q. Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines

Q. Is diagnosis code No. U1195 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. Use M.U.T.-III to confirm a diagnosis code of other systems.
Check whether a diagnosis code is set in the ETACS-ECU (Refer to GROUP 54A - ETACS, Diagnosis Code Chart ).

Q. Is the diagnosis code set?
Follow the relevant diagnosis code procedure. Then go to Step 6.
Go to Step 4.

STEP 4. ETACS-ECU coding data check
Using M.U.T.-III, check if any abnormality is present to the coding data which are stored in the ETACS-ECU.

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

STEP 5. Check part number of ASTC-ECU
Check the part number of ASTC-ECU.

Q. Is the check result normal?
Go to Step 6.
Replace the hydraulic unit assembly (integrated with ASTC-ECU) (Refer to ).

STEP 6. Diagnosis code recheck
Check again if the diagnosis code is set.
(1)Erase the set diagnosis code.
(2)Ignition switch: "LOCK" (OFF)
(3)Ignition switch: "ON"

Q. Is diagnosis code No. U1195 set?
Replace the hydraulic unit assembly (integrated with ASTC-ECU) (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).