Last Modified: 12-11-2024 6.11:8.1.0 Doc ID: RM100000002PAPL
Model Year Start: 2025 Model: Corolla Hatchback Prod Date Range: [09/2024 -           ]
Title: K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P175009; Brake ECU Malfunction; 2025 MY Corolla Corolla Hatchback [09/2024 -        ]

DTC

P175009

Brake ECU Malfunction

DESCRIPTION

This DTC is stored if the ECM receives a malfunction signal from the skid control ECU (brake actuator assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

Priority

Note

P175009

Brake ECU Malfunction

When the vehicle is being driven at 20 km/h (12 mph) or more, the ECM receives a malfunction signal from the skid control ECU (brake actuator assembly) for 9 seconds or more (1-trip detection logic).

Electronically controlled brake system

Comes on

Engine

B

SAE Code:

P1750

CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Drive the vehicle at 20 km/h (12 mph) or more for 9 seconds or more.
  4. Stop the vehicle.
  5. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  6. Input the DTC: P175009.
  7. Check the DTC judgment result.

    GTS Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

PROCEDURE

1.

CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Check for electronically controlled brake system DTCs.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
A

CHECK FOR INTERMITTENT PROBLEMS

B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM