C2000

DTC C2000: Abnormality in wheel fluid pressure sensor circuit

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 Initial Inspection and Diagnostic Overview ).
- 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 (Refer to G and Yaw Rate Sensor Calibration , Testing and Inspection , Master Cylinder Brake Fluid Pressure Sensor Calibration , and Testing and Inspection ).

CIRCUIT OPERATION

The wheel cylinder pressure sensor is integrated into the hydraulic unit. It converts the signal of brake fluid pressure in wheel cylinder of each wheel to the voltage value, then outputs the value to ASC-ECU.

DTC SET CONDITIONS

This diagnostic trouble code is set when the voltage value, which was converted from the signal of brake fluid pressure in wheel cylinder of each wheel and sent by the wheel cylinder pressure sensor to ASC-ECU, is outside the standard range.

PROBABLE CAUSES

- Damaged wiring harness and connectors
- Malfunction of hydraulic unit (with built-in wheel cylinder pressure sensor)

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
- MB991997: ASC check harness

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 3.
NO Repair the CAN bus lines CAN Bus Diagnostics Chart).
After repairing the CAN bus line, go to Step 2.
STEP 2. DTC recheck after repairing the CAN bus line

Erase the DTC.

Q. Is DTC C2000 set?

YES Go to Step 3.
NO The procedure is complete.
STEP 3. Check whether the DTC is reset.

Erase the DTC.

Q. Is DTC C2000 set?

YES Replace the hydraulic unit (integrated with ASC-ECU) (Refer to Service and Repair). Then go to Step 4.
NO Intermittent malfunction How to Cope With Intermittent Malfunctions).
STEP 4. Check whether the DTC is reset.

Erase the DTC.

Q. Is DTC C2000 set?

YES Return to Step 1.
NO The procedure is complete.