BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C116E63,C116F63,C124E62; ABS Operation Continuous Request; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM1000000025DU7
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C116E63,C116F63,C124E62; ABS Operation Continuous Request; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

DTC

C116E63

ABS Operation Continuous Request

DTC

C116F63

VSC Operation Continuous Request

DTC

C124E62

Wheel Speed Sensor Signal Compare Failure

DESCRIPTION

The skid control ECU (brake actuator assembly) measures the speed of each wheel by receiving signals from each speed sensor.

These signals are used for recognizing that all four wheels are operating properly.

Therefore, signals from all wheels must be equal.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C116E63	ABS Operation Continuous Request	ABS operation continues for 60 seconds or more.	Tire wear Tire pressure Tire and wheel size Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C116E Output ECU: Skid control ECU (brake actuator assembly)
C116F63	VSC Operation Continuous Request	VSC operation continues for 10 seconds or more. When the vehicle speed is 100 km/h (62 mph), VSC operation continues for 5 seconds or more.	Tire wear Tire pressure Tire and wheel size Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C116F Output ECU: Skid control ECU (brake actuator assembly)
C124E62	Wheel Speed Sensor Signal Compare Failure	Abnormal pulse signals from 2 or more sensors. Discrepancy among four wheel speed sensor output.	Tire wear Tire pressure Tire and wheel size Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C124E Output ECU: Skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

C116E:

When downhill assist control* is not operating and ABS operates continuously for a certain amount of time, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
*: w/ Downhill Assist Control

C116F:

When the vehicle speed is less than a certain value or is a certain value or more and the VSC operates continuously for a certain amount of time, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C124E (Case 1 and 2):

When an abnormal speed sensor output pulse is detected certain number of times or more, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C124E (Case 3):

When the VSC is not operating, the vehicle speed is less than a certain value, the output of the yaw rate sensor (airbag sensor assembly) exceeds a certain value, and any of the following conditions are met, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- The lowest speed sensor value is a certain value or more and the difference between the highest speed sensor value and lowest speed sensor value is more than a certain value.
- The lowest speed sensor value is less than a certain value and the difference between the highest speed sensor value and lowest speed sensor value is more than a certain value.
- The vehicle speed is a certain value or more, the lowest speed sensor value is a certain value or more, and the difference between the lowest speed sensor value and the highest speed sensor value is a certain value or more.
- The vehicle speed is a certain value or more, the lowest speed sensor value is less than a certain value, the difference between the highest speed sensor value and lowest speed sensor value is a certain value or more, and the second highest speed sensor value is a certain value or less.
- The difference between the highest speed sensor value and second highest speed sensor value is less than the difference between the second highest speed sensor value and the lowest speed sensor value, the difference between the third highest speed sensor value and the lowest speed sensor value is less than the difference between the highest speed sensor value and third highest speed sensor value, and the highest speed sensor value is more than a certain value.

C124E (Case 4):

The skid control ECU (brake actuator assembly) has a speed sensor circuit self-diagnosis function. When the skid control ECU detects a speed sensor circuit malfunction during self-diagnosis, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

*: w/ Downhill Assist Control
Related DTCs	C116E: ABS continuous control C116F: VSC irrational control C124E (Case 1): Wheel speed sensor multiple suspected failure (2 wheels or more) C124E (Case 2): Wheel speed sensor multiple suspected failure (3 wheels or more) C124E (Case 3): Wheel speed sensor slip monitoring (non-allocable) C124E (Case 4): Wheel speed sensor multiplexer-DMA buffer noise monitoring
Required Sensors/Components(Main)	Skid control ECU (brake actuator assembly) Speed sensor
Required Sensors/Components(Related)	Skid control ECU (brake actuator assembly) Downhill assist control switch* Speed sensor Yaw rate sensor (airbag sensor assembly)
Frequency of Operation	Continuous
Duration	0.03 seconds: C124E (Case 4) 0.5 seconds: C124E (Case 1 and 2) 5 seconds: C116F (Case1-2) 10 seconds: C116F (Case1-1) 9 to 72 seconds (depending on the driving situation): C124E (Case 3) 60 seconds: C116E
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

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

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

TMC's intellectual property

CONFIRMATION DRIVING PATTERN

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.
Wait for 1 minute or more. [*]
HINT:

[*]: 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/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
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.

CAUTION / NOTICE / HINT

NOTICE:

DTC precaution

Click here

Procedure to clear warning lights (When not clearing DTCs)

Procedure
Repair or replacement. Turn the ignition switch to ON. Drive the vehicle at 11 km/h (7 mph) or more for 1 second or more to clear the warning lights.

PROCEDURE

CHECK DTC

(a) Read the DTCs using the GTS.

Chassis > Brake/EPB > Trouble Codes

HINT:

When DTC C05001C, C05061C, C050C1C and/or C05121C are output together with DTC C116E63, C116F63 or C124E62, inspect and repair the trouble areas indicated by DTC C05001C, C05061C, C050C1C and/or C05121C first.

Result	Proceed to
C116E63, C116F63 or C124E62 and C05001C, C05061C, C050C1C and/or C05121C are output simultaneously	A
Only C116E63, C116F63 or C124E62 is output	B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

PRE-CHECK

(a) Check that all 4 tires are of correct size, are inflated to the correct pressure, and do not show excessive signs of wear.

Click here

HINT:

If a tire is deformed or an incorrectly sized tire or wheel is installed, this DTC may be stored.

3.	CHECK FREEZE FRAME DATA (WHEEL SPEED AND VEHICLE SPEED)

(a) Select a DTC to display the Freeze Frame Data.

(b) Read the freeze frame data of DTC C116E63, C116F63 or C124E62.

Chassis > Brake/EPB

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front wheel speed sensor RH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
FL Wheel Speed	Front wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
Vehicle Speed	Vehicle speed (vehicle speed used for each control)	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations

Chassis > Brake/EPB > DTC(C116E63) > Freeze Frame Data

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed
Vehicle Speed

Chassis > Brake/EPB > DTC(C116F63) > Freeze Frame Data

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed
Vehicle Speed

Chassis > Brake/EPB > DTC(C124E62) > Freeze Frame Data

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed
Vehicle Speed

4.	READ VALUE USING GTS (WHEEL SPEED AND VEHICLE SPEED)

(a) Check the Data List using the GTS.

Chassis > Brake/EPB > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front wheel speed sensor RH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
FL Wheel Speed	Front wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
Vehicle Speed	Vehicle speed	Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations

Chassis > Brake/EPB > Data List

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed
Vehicle Speed

(b) Turn the ignition switch to ON (READY).

(c) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.

(d) Check the value of Wheel Speed and Vehicle Speed.

OK:

The value of each Wheel Speed and Vehicle Speed changes in accordance with vehicle speed and the maximum difference between any 2 sensors is less than 6%.

HINT:

If the result of the road test is within the specified range, it is possible that this DTC was stored due to a particular situation.

Using to the freeze frame data, the approximate vehicle conditions that were present when the DTC was stored can be determined.

Click here

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE ACTUATOR ASSEMBLY