BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C129A2B,...,C136A1C; Electronic Brake Booster Motor "A" Position Sensor Signal Cross Coupled; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000025DU9
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C129A2B,...,C136A1C; Electronic Brake Booster Motor "A" Position Sensor Signal Cross Coupled; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

DTC

C129A2B

Electronic Brake Booster Motor "A" Position Sensor Signal Cross Coupled

DTC

C129A84

Electronic Brake Booster Motor "A" Position Sensor Signal Below Allowable Range

DTC

C129A85

Electronic Brake Booster Motor "A" Position Sensor Signal Above Allowable Range

DTC

C135A1C

Electronic Brake Booster Motor "A" Position Sensor Circuit "A" Circuit Voltage Out of Range

DTC

C136A1C

Electronic Brake Booster Motor "A" Position Sensor Circuit "B" Circuit Voltage Out of Range

DESCRIPTION

When the motor rotation angle sensor inside the electric brake booster (brake booster with master cylinder assembly) meets the detection conditions, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C129A2B	Electronic Brake Booster Motor "A" Position Sensor Signal Cross Coupled	Motor rotation angle sensor (brake booster with master cylinder assembly) detected outside of operating range.	Electric brake booster (brake booster with master cylinder assembly)	Comes on	Brake Booster	SAE Code: C129B (Case 1) Output ECU: Electric brake booster (brake booster with master cylinder assembly)
C129A84	Electronic Brake Booster Motor "A" Position Sensor Signal Below Allowable Range	Motor rotation angle sensor (brake booster with master cylinder assembly) detected outside of operating range.	Electric brake booster (brake booster with master cylinder assembly)	Comes on	Brake Booster	SAE Code: C129B (Case 3) Output ECU: Electric brake booster (brake booster with master cylinder assembly)
C129A85	Electronic Brake Booster Motor "A" Position Sensor Signal Above Allowable Range	Motor rotation angle sensor (brake booster with master cylinder assembly) detected outside of operating range.	Electric brake booster (brake booster with master cylinder assembly)	Comes on	Brake Booster	SAE Code: C129B (Case 2) Output ECU: Electric brake booster (brake booster with master cylinder assembly)
C135A1C	Electronic Brake Booster Motor "A" Position Sensor Circuit "A" Circuit Voltage Out of Range	Motor rotation angle sensor (brake booster with master cylinder assembly) voltage value detected is higher than operating range. Motor rotation angle sensor (brake booster with master cylinder assembly) voltage value exceeds operating range.	Electric brake booster (brake booster with master cylinder assembly)	Comes on	Brake Booster	SAE Code: C135B (Case 1 and 2) Output ECU: Electric brake booster (brake booster with master cylinder assembly)
C136A1C	Electronic Brake Booster Motor "A" Position Sensor Circuit "B" Circuit Voltage Out of Range	Motor rotation angle sensor (brake booster with master cylinder assembly) voltage value detected is higher than operating range. Motor rotation angle sensor (brake booster with master cylinder assembly) voltage value exceeds operating range.	Electric brake booster (brake booster with master cylinder assembly)	Comes on	Brake Booster	SAE Code: C136B (Case 1 and 2) Output ECU: Electric brake booster (brake booster with master cylinder assembly)

MONITOR DESCRIPTION

C129B (Case 1):

When the electronically controlled brake system is operating and the output value of the rotor position sensor is outside of a certain range, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

C129B (Case 2):

When the electronically controlled brake system is operating and the output value of the rotor position sensor is a certain value or more, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

C129B (Case 3):

When the electronically controlled brake system is operating and the output value of the rotor position sensor is a certain value or less, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

C135B (Case 1 and 2) and C136B (Case 1 and 2):

When the electronically controlled brake system is operating and the detected voltage value by the rotor position sensor is outside of a certain range, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	C129B (Case 1): Motor rotation angle sensor rationality monitoring (vector length oscillating) C129B (Case 2): Motor rotation angle sensor rationality monitoring (vector-length-high) C129B (Case 3): Motor rotation angle sensor rationality monitoring (vector-length-low) C135B (Case 1): Motor rotation angle sensor range monitoring (sin-high) C135B (Case 2): Motor rotation angle sensor range monitoring (sin-low) C136B (Case 1): Motor rotation angle sensor range monitoring (cos-high) C136B (Case 2): Motor rotation angle sensor range monitoring (cos-low)
Required Sensors/Components(Main)	Electric brake booster (brake booster with master cylinder assembly)
Required Sensors/Components(Related)	Electric brake booster (brake booster with master cylinder assembly)
Frequency of Operation	Continuous
Duration	-: C135B (Case 1 and 2) and C136B (Case 1 and 2) 0.01 seconds: C129B (Case 2 and 3) 0.015 seconds: C129B (Case 1)
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 second 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 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.

PROCEDURE

1.	REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

Click here

END