PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A50

DTC Code DTC Name
C1A50 Brake System

DESCRIPTION

When the pre-crash safety system is operating, the driving support ECU assembly sends brake control signals to the brake booster with master cylinder assembly (skid control ECU).

When the driving support ECU assembly receives a electronically controlled brake system malfunction signal from the brake booster with master cylinder assembly (skid control ECU) via CAN communication, DTC C1A50 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1A50

Brake System

While the power switch is on (IG), the driving support ECU assembly receives a electronically controlled brake system malfunction signal from the brake booster with master cylinder assembly (skid control ECU) for 0.2 seconds or more.

  • Electronically controlled brake system

  • Brake booster with master cylinder assembly (skid control ECU)

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

Note:

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.

    Click here

  • When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE

  1. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

    5. Check for DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      Electronically controlled brake system DTCs are not output

      A

      Electronically controlled brake system DTCs are output

      B
    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

    Click here

    A

  2. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Pre-Crash 2 > Clear DTCs

    2. Make sure that the DTC detection conditions are met.

      Tip:

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Click here

      Body Electrical > Pre-Crash 2 > Trouble Codes

      OK

      DTC C1A50 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    NG

  3. REPLACE DRIVING SUPPORT ECU ASSEMBLY

    1. Replace the driving support ECU assembly with a new one.

      for LHD:Click here

      for RHD:Click here

    Result

    Proceed to

    NEXT
    NEXT

  4. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Pre-Crash 2 > Clear DTCs

    2. Make sure that the DTC detection conditions are met.

      Tip:

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Click here

      Body Electrical > Pre-Crash 2 > Trouble Codes

      OK

      DTC C1A50 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU)

    for LHD:Click here

    for RHD:Click here