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DTC C1392 Incomplete learn (Longitudinal G)
DTC C1393 Incomplete learn neutral(Lateral G)
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. 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 scan tool (M.U.T.-IIISE) is operated, the ASC-ECU will learn the neutral position of the G sensor and then store it in its memory.
 
 
 
DTC SET CONDITIONS
The ASC-ECU will store this DTC when it has not learned the neutral position of the G sensor.
 
 
 
TROUBLESHOOTING HINTS
  • The neutral position of the G sensor has not been learned.
  • ASC-ECU malfunction
 
 
 
 
DIAGNOSIS
STEP 1. Scan tool (M.U.T.-IIISE) CAN bus diagnostics.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn on the power supply mode of the electric motor switch.
(3) Diagnose the CAN bus line.
(4) Turn off the power supply mode of the electric motor switch.
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. DTC recheck after resetting CAN bus lines.
Is DTC No.C1392 or C1393 set?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Check the G sensor-related DTC.
Use the scan tool (M.U.T.-IIISE) to check whether the G sensor-related DTC is set or not.
Is the DTC set?
Troubleshoot for the relevant DTC (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 .
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 electric motor switch to the OFF from 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 electric motor switch to the OFF from ON. Then go to Step 5.
 
STEP 5. Scan tool (M.U.T.-IIISE) data list.
Check the following data list (Refer to ).
  • Item No. 08: Lateral G sensor
  • Item No. 09: G sensor
  • Item No. 73: Lateral G sensor offset
  • Item No. 96: G sensor offset
Is the check result normal?
Go to Step 6.
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
 
STEP 6. Check whether the DTC is set again.
Is DTC No.C1392 or C1393 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
This diagnosis is complete.