C2200

DTC C2200: Abnormality in ASC-ECU

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.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
^ When the hydraulic unit (integrated with ASC-ECU) is replaced, always perform the calibration of steering wheel sensor, G and yaw rate sensor, brake fluid pressure sensor, cut valve, and inlet valve.

CIRCUIT OPERATION
ASC-ECU controls ASC by calculating the data sent from the wheel speed sensor, steering wheel sensor, and G and yaw rate sensor.

DTC SET CONDITIONS
This diagnostic trouble code is set when ASC-ECU has malfunction.

PROBABLE CAUSES
ASC-ECU malfunction

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. Using scan tool MB991958, diagnose the CAN bus lines.
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 2.
NO: Repair the CAN bus lines. (Refer to Troubleshooting Can Bus Diagnostics Table.) After repairing the CAN bus line, go to Step 3.

STEP 2. Check whether the DTC is reset.
Q: Is DTC C2200 set?
YES: Replace the hydraulic unit (incorporates in ASC-ECU). Then go to Step 3.
NO: Intermittent malfunction.

STEP 3. Check whether the DTC is reset.
Q: Is DTC C2200 set?
YES: Return to Step 1.
NO: This diagnosis is complete.