ASC

DTC C1210: 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.
^ 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.
^ 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.

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 CAN bus lines.

DTC SET CONDITIONS
This diagnostic trouble code is set if any malfunction below is found:
^ When the output value of the longitudinal G-sensor is abnormal
^ When abnormality in longitudinal G-sensor is detected by the self-diagnosis of the G and yaw rate sensor

PROBABLE CAUSES
^ G and yaw rate sensor malfunction
^ ASC-ECU malfunction
^ External noise interference
^ The G and yaw rate sensor for FWD is installed.

DIAGNOSIS

Required Special Tools:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827: M.U.T.-III USB Cable
^ MB991910: M.U.T.-III Main Harness

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. On completion, go to Step 2.

STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Q: Is DTC C1210 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. G and yaw rate sensor parts number check
Q: Is the check result normal?
YES: Go to Step 4.
NO: Replace the G and yaw rate sensor, and then go to Step 7.

STEP 4. M.U.T.-III data list Check the following service data.
^ Item 09: G sensor
Q: Is the check result normal?
YES: Go to Step 5.
NO: Replace the G and yaw rate sensor, and then go to Step 7.

STEP 5. Check whether the diagnostic trouble code is reset.
Q: Is DTC C1210 set?
YES: Replace the G and yaw rate sensor, and then go to Step 6.
NO: Intermittent malfunction.

STEP 6. Check whether the diagnostic trouble code is reset.
Q: Is DTC C1210 set?
YES: Replace the ASC-ECU, and then go to Step 7.
NO: This diagnosis is complete.

STEP 7. Check whether the diagnostic trouble code is reset.
Q: Is DTC C1210 set?
YES: Return to Step 1.
NO: This diagnosis is complete.