BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C054016,C054017; Brake Pressure Sensor "A" Circuit Voltage Below Threshold; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000025DTY
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C054016,C054017; Brake Pressure Sensor "A" Circuit Voltage Below Threshold; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

DTC

C054016

Brake Pressure Sensor "A" Circuit Voltage Below Threshold

DTC

C054017

Brake Pressure Sensor "A" Circuit Voltage Above Threshold

DESCRIPTION

The master cylinder pressure sensor is connected to the skid control ECU inside the brake actuator assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C054016	Brake Pressure Sensor "A" Circuit Voltage Below Threshold	Divergence between relative displacement sensor value of electric brake booster (brake booster with master cylinder assembly) and oil pressure value of skid control ECU (brake actuator assembly) is large.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C053D (Case 1) Output ECU: Skid control ECU (brake actuator assembly)
C054017	Brake Pressure Sensor "A" Circuit Voltage Above Threshold	Divergence between relative displacement sensor value of electric brake booster (brake booster with master cylinder assembly) and oil pressure value of skid control ECU (brake actuator assembly) is large.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C053D (Case 2) Output ECU: Skid control ECU (brake actuator assembly)

When the master cylinder pressure sensor and CAN communication are normal, the vehicle is being driven at a certain speed or more, and the master cylinder pressure is too high with respect to the brake pedal stroke amount as detected by the electric brake booster (brake booster with master cylinder assembly), the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

When the master cylinder pressure sensor and CAN communication are normal, the vehicle is being driven at a certain speed or more, and the master cylinder pressure is too low with respect to the brake pedal stroke amount as detected by the electric brake booster (brake booster with master cylinder assembly), the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

Related DTCs	C053D (Case 1): Pressure sensor rationality monitor (high) C053D (Case 2): Pressure sensor rationality monitor (low)
Required Sensors/Components(Main)	Electric brake booster (brake booster with master cylinder assembly) Brake pedal stroke sensor assembly
Required Sensors/Components(Related)	Electric brake booster (brake booster with master cylinder assembly) Speed sensor
Frequency of Operation	Continuous
Duration	0.2 seconds
MIL Operation	2 driving cycles
Sequence of Operation	None

Monitor runs whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TMC's intellectual property

TMC's intellectual property

NOTICE:

When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off.
Turn the ignition switch to ON (READY) and turn the GTS on.
Drive the vehicle at a speed of 3 km/h (2 mph) or more for 1 second or more. [*1]
Enter dealer mode or inspection mode, and drive the vehicle at a speed of 10 km/h (6 mph) for 1 second or more. [*2]
HINT:

[*1] to [*2]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Chassis / Brake Booster / Utility / All Readiness.
Check the DTC judgment result.
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, perform driving pattern again.

CLEAR DTC

(a) Clear the DTCs.

(b) Turn the ignition switch off.

2.	RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Result	Proceed to
C054016 and C054017 are not output	A
C054016 and/or C054017 are output	B