Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028EHK
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [11/2022 -           ]
Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P175009; Brake ECU Malfunction; 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]

DTC

P175009

Brake ECU Malfunction

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P175009

Brake ECU Malfunction

When the vehicle is being driven at 20 km/h (12 mph) or more, the TCM 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

DTC stored

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. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine.
  7. Drive the vehicle at 20 km/h (12 mph) or more for 9 seconds or more.
  8. Stop the vehicle.
  9. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  10. Input the DTC: P175009.
  11. Check the DTC judgment result.

    Techstream 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 2023 MY Corolla Corolla Hatchback GR Corolla [11/2022 - 03/2023]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART 2023 MY Corolla Corolla Hatchback GR Corolla [03/2023 - 08/2023]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART