Code No. C2204 Internal abnormality in G and yaw rate sensor


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 ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • Do not drop or shock the G and yaw rate sensor.
  • When the G and yaw rate sensor is replaced, always carry out calibration to make ASC-ECU learn the neutral point (Refer to ).
  • 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
ABS-ECU monitors if the output of G and yaw rate sensor is normal or not.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if any malfunction below is found:

  • When abnormality is detected by the self-diagnosis of the lateral G and yaw rate
  • When the output value of the lateral G and yaw rate is not within the standard value range
note This diagnosis code may be set when G and yaw rate sensor is put on the turntable turning at high speed.

PROBABLE CAUSES

  • Improper installation of the G and yaw rate sensor
  • Damaged wiring harness and connectors
  • G and yaw rate sensor malfunction
  • ASC-ECU malfunction

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 Diagnosis table ). On completion, go to Step 2.

STEP 2. M.U.T.-III diagnosis code
Check that the diagnosis code U0125 is set in ASC-ECU.

Q. Is the diagnosis code No.U0125 set?
Troubleshoot for the diagnosis code (Refer to ). Then go to Step 3.
Go to Step 3.

STEP 3. Diagnosis code recheck after resetting CAN bus lines

Q. Is the diagnosis code No.C2204 set?
Go to Step 4.
This diagnosis is complete.

STEP 4. G and yaw rate sensor installation check
Check that the G and yaw rate sensor is installed correctly.

Q. Is the check result normal?
After checking the G and yaw rate sensor, carry out calibration of the G and yaw rate sensor to make ASC-ECU relearn the neutral point (Refer to .), and then go to Step 5.
Reinstall the G and yaw rate sensor correctly (Refer to ), and then go to Step 7.

STEP 5. M.U.T.-III data list
Check the following service data (Refer to ).

  • Item 08: Lateral G-sensor
  • Item 09: G-sensor
  • Item 12: Yaw rate sensor

Q. Is the check result normal?
Go to Step 6.
Replace the G and yaw rate sensor (Refer to ), and then go to Step 6.

STEP 6. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.C2204 set?
Replace the hydraulic unit (ASC-ECU) (Refer to ), and then go to Step 7.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 7. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.C2204 set?
Return to Step 1.
This diagnosis is complete.