Code No. C2203 Chassis No. not recorded


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 ).
  • When other diagnosis code for ASC-ECU is set, troubleshoot that diagnosis code first.
  • 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 , and ).

OPERATION
ASC-ECU receives vehicle information from the engine ECU and stores it.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when ASC-ECU cannot receive the vehicle information from the engine ECU.

PROBABLE CAUSES

  • Malfunction of the CAN bus
  • Engine ECU malfunction
  • ASC-ECU malfunction
  • When the ignition switch is turned to the "ON" position for the first time after the ASC-ECU is replaced.

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 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnosis table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines
(1)Ignition switch "LOCK" (OFF)
(2)Ignition switch "ON"

Q. Is the diagnosis code No.C2203 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III diagnosis code
Check that the engine ECU sets a diagnosis code.

Q. Is any diagnosis code set?
YES (2000) : Troubleshoot the engine ECU diagnosis code (Refer to GROUP 13A - Troubleshooting ), and then go to Step 5.
YES (3000) : Troubleshoot the engine ECU diagnosis code (Refer to GROUP 13C - Troubleshooting ), and then go to Step 5.
YES (2400) : Troubleshoot the engine ECU diagnosis code (Refer to GROUP 13D - Troubleshooting ), and then go to Step 5.
YES (2200) : Troubleshoot the engine ECU diagnosis code (Refer to GROUP 13E - Troubleshooting), and then go to Step 5.
Go to Step 4.

STEP 4. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.C2203 set?
Replace the ASC-ECU (Refer to ), and then go to Step 5.
If a trouble is solved, it is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 5. Check whether the diagnosis code is reset.
(1)Ignition switch "LOCK" (OFF)
(2)Ignition switch "ON"

Q. Is the diagnosis code No.C2203 set?
Return to Step 1.
This diagnosis is complete.