Code No. C1392 Incomplete learn (Longitudinal G)
Code No. C1393 Incomplete learn neutral(Lateral G)



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION


When the M.U.T.-III is operated, the ASC-ECU will learn the neutral position of the G sensor and then store it in its memory.

DIAGNOSIS CODE SET CONDITIONS


The ASC-ECU will store this diagnosis code when it has not learned the neutral position of the G sensor.

PROBABLE CAUSES



  • The neutral position of the G sensor has not been learned.
  • ASC-ECU malfunction

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use 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 - CAN Bus Diagnostics Table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines


Q. Is diagnosis code No.C1392 or C1393 stored?

Go to Step 3.
This diagnosis is complete.

STEP 3. Check the G sensor-related diagnosis code.


Use the M.U.T.-III to check whether the G sensor-related diagnosis code is stored or not.

Q. Is the diagnosis code stored?

Troubleshoot for the relevant diagnosis code (Refer to ).
Go to Step 4.

STEP 4. Check whether the ASC-ECU is installed properly.


Check whether the ASC-ECU is installed correctly. Refer to .

Q. Is the check result normal?

Execute "Lateral G sensor calibration" and "G sensor calibration" on "Special function". After the calibration is performed (Refer to ) , turn the ignition switch from "OFF" to "ON". Then go to Step 5.
Install the ASC-ECU properly, and execute "Lateral G sensor calibration" and "G sensor calibration" on "Special function". After the calibration is performed (Refer to ) , turn the ignition switch from "OFF" to "ON". Then go to Step 5.

STEP 5. M.U.T.-III data list


Check the following data list (Refer to ).

  • Item 08: Lateral G sensor
  • Item 09: G sensor
  • Item 73: Lateral G sensor offset
  • Item 96: G sensor offset

Q. Is the check result normal?

Go to Step 6.
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 7.

STEP 6. Check whether the diagnosis code is stored again.


Q. Is diagnosis code No.C1392 or C1393 stored?

Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 7.
This diagnosis is complete.

STEP 7. Check whether the diagnosis code is stored again.


Q. Is diagnosis code No.C1392 or C1393 stored?

Return to Step 1.
This diagnosis is complete.