ASC

DTC C2111: Sensor Power Supply Circuit

DTC C2112: Sensor Power Supply Circuit (Brake Fluid Pressure Sensor)

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
When the brake pedal is depressed, the brake fluid pressure sensor integrated in the hydraulic unit detects the brake fluid pressure applied from the master cylinder, converts the pressure value into voltage signal, and outputs it.

DTC SET CONDITIONS
This diagnostic trouble code is set when the voltage applied to the pressure sensor is not within the standard value range.

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. 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: Are DTCs C2111 and C2112 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. Battery check
Q: Is the battery in good condition?
YES: Go to Step 4.
NO: Charge or replace the battery.

STEP 4. Charging system check
Q: Is the charging system in good condition?
YES: Go to Step 5.
NO: Repair or replace the charging system component(s).

STEP 5. Check whether the diagnostic trouble code is reset.
Q: Are DTCs C2111 and C2112 set?
YES: Replace the ASC-ECU.
NO: The procedure is complete.