Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Brake System Malfunction (C13A9)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Brake / Parking Brake / Electric Parking Brake System(for Hv Model) / Brake System Malfunction (C13A9)

DESCRIPTION

The parking brake ECU (brake actuator assembly) receives the wheel speed signal of each wheel from the skid control ECU (brake booster with master cylinder assembly) via CAN communication.

This DTC is stored when a malfunction occurs in the skid control ECU (brake booster with master cylinder assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13A9

Brake System Malfunction

Both of following conditions are met:

  • Power switch on (IG)
  • Malfunction signal is received from skid control ECU (brake booster with master cylinder assembly) for approximately 0.3 seconds.
  • Skid control ECU (brake booster with master cylinder assembly)
  • Parking brake ECU (brake actuator assembly)

DTC stored

An electric parking brake system malfunction is displayed on the multi-information display.

CAUTION / NOTICE / HINT

NOTICE:

The parking brake indicator light blinks (red) when the power switch is turned on (IG) after replacing the parking brake ECU (brake actuator assembly). Operate the electric parking brake switch (electric parking brake switch assembly) to turn off the parking brake indicator light (red).

PROCEDURE

1.

CHECK DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Check for DTCs.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

A

2.

CHECK DTC (ELECTRIC PARKING BRAKE SYSTEM)

(a) Clear the DTCs.

Chassis > Electric Parking Brake > Clear DTCs

(b) Turn the power switch off.

(c) Check for DTCs.

Chassis > Electric Parking Brake > Trouble Codes

Result

Proceed to

DTCs are output

A

DTCs are not output

B
A

REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)

B

USE SIMULATION METHOD TO CHECK

    Actuator Malfunction (C13A7)

    EPB High Temperature (C13AA)

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