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.
^ 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
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
^ 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. After repairing the CAN bus line, go to Step 2.

STEP 2. DTC recheck after repairing the CAN bus line

Q: Is DTC C2000 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. Check whether the DTC is reset.

Q: Is DTC C2000 set?
YES: Replace the hydraulic unit (incorporates in ASC-ECU). Then go to Step 4.
NO: Intermittent malfunction.

STEP 4. Check whether the DTC is reset.

Q: Is DTC C2000 set?
YES: Return to Step 1.
NO: The procedure is complete.