Code No. C2114 Abnormality in G and yaw rate sensor operation voltage
Code No. C2115 Abnormality in G and yaw rate sensor operation voltage














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



  • ASC-ECU supplies power to the G and yaw rate sensor at the terminal No.1.
  • The G and yaw rate sensor outputs the signal to ASC-ECU via the special CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS


This diagnosis code is set if any malfunction below is found:
Code No.C2114
  • When the power supply voltage applied from ASC-ECU to the G and yaw rate sensor is not within the standard value range (low)
Code No.C2115
  • When the power supply voltage applied from ASC-ECU to the G and yaw rate sensor is not within the standard value range (high)

PROBABLE CAUSES



  • 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 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


Q. Are the diagnosis codes No. C2114 or C2115 set?

Go to Step 3.
This diagnosis is complete.

STEP 3. G and yaw rate sensor installation check


Check that the G and yaw rate sensor is installed correctly.

Q. Is the check result normal?

Go to Step 4.
Reinstall the G and yaw rate sensor correctly (Refer to ), and then go to Step 12.

STEP 4. Voltage measurement at C-30 G and yaw rate sensor connector


(1)Do not disconnect the connector.
(2)Turn the ignition switch to the ON position.
(3)Measure the voltage between the terminal No.1 and the body earth for back probing.
OK: Approximately battery voltage

Q. Is the check result normal?

Go to Step 7.
Go to Step 5.

STEP 5. Connector check: A-03 ASC-ECU connector, C-30 G and yaw rate sensor connector


Q. Is the check result normal?

Go to Step 6.
Repair the defective connector, and then go to Step 12.

STEP 6. Wiring harness check between A-03 ASC-ECU connector terminal No.6 and C-30 G and yaw rate sensor connector terminal No.1.



  • Check the open circuit in power supply circuit.

Q. Is the check result normal?

Go to Step 7.
Repair the wiring harness, and then go to Step 12.

STEP 7. Resistance measurement at C-30 G and yaw rate sensor connector


(1)Disconnect the connector, and measure at the wiring harness-side connector.
(2)Resistance between the terminal No.5 and the body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 10.
Go to Step 8.

STEP 8. Connector check: A-03 ASC-ECU connector, C-30 G and yaw rate sensor connector


Q. Is the check result normal?

Go to Step 9.
Repair the defective connector, and then go to Step 12.

STEP 9. Wiring harness check between A-03 ASC-ECU connector terminal No.31 and C-30 G and yaw rate sensor connector terminal No.5



  • Check the earth wires for open circuit.

Q. Is the check result normal?

Go to Step 10.
Repair the wiring harness, and then go to Step 12.

STEP 10. 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 11.
Replace the G and yaw rate sensor (Refer to ), and then go to Step 12.

STEP 11. Check whether the diagnosis code is reset.


Q. Are the diagnosis codes No.C2114 or C2115 set?

Replace the ASC-ECU (Refer to ), and then go to Step 12.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 12. Check whether the diagnosis code is reset.


Q. Are the diagnosis codes No.C2114 or C2115 set?

Return to Step 1.
This diagnosis is complete.