U0125

DTC U0125: G and yaw rate sensor message time-out error/message error

CAUTION: If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.

CIRCUIT OPERATION
The G and yaw rate sensor outputs the signal to ASC-ECU via the special CAN bus lines.

DTC SET CONDITIONS
This diagnostic trouble code is set when the G and yaw rate sensor signal is not sent to ASC-ECU.

PROBABLE CAUSES
^ Wiring harness or connector failure of CAN bus line
^ G and yaw rate sensor malfunction
^ ASC-ECU malfunction
^ External noise interference

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 A

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 2.
NO: Repair the CAN bus lines. On completion, go to Step 4.

STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Q: Is DTC U0125 set?
YES: Replace the G and yaw rate sensor, and then go to Step 3.
NO: The procedure is complete.

STEP 3. Check whether the diagnostic trouble code is reset.
Q: Is DTC U0125 set?
YES: Replace the ASC-ECU, and then go to Step 4.
NO: The procedure is complete.

STEP 4. Check whether the diagnostic trouble code is reset.
Q: Is DTC U0125 set?
YES: Go to Step 1.
NO: The procedure is complete.