BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C051214; Right Rear Wheel Speed Sensor Circuit Short to Ground or Open; 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000002D0ED
Model Year Start: 2024	Model: GR Corolla	Prod Date Range: [08/2023 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C051214; Right Rear Wheel Speed Sensor Circuit Short to Ground or Open; 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023 - ]

DTC

C051214

Right Rear Wheel Speed Sensor Circuit Short to Ground or Open

DESCRIPTION

Refer to DTC C051212

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
C051214	Right Rear Wheel Speed Sensor Circuit Short to Ground or Open	A short or open circuit is detected in the speed sensor signal circuit for 0.12 seconds or more.	Rear speed sensor RH (rear axle hub and bearing assembly RH) Wire harness or connector Skid control sensor wire RH (No. 1 parking brake wire assembly) Skid control ECU (brake actuator assembly)	Comes on	SAE Code: C0514 (Case 1 and 2)

MONITOR DESCRIPTION

C0514 (Case 1):

The skid control ECU (brake actuator assembly) has a speed sensor circuit self-diagnosis function.
When the self-diagnosis function that is performed during startup detects that the current of the speed sensor circuit is less than a certain value, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C0514 (Case 2):

When the speed sensor circuit is normal, and it is detected that the speed sensor output signal is invalid, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	C0514 (Case 1): Wheel speed sensor line monitoring for RR (signal line short to GND) C0514 (Case 2): Wheel speed sensor line monitoring for RR (undefined)
Required Sensors/Components(Main)	Skid control ECU (brake actuator assembly) Speed sensor
Required Sensors/Components(Related)	Skid control ECU (brake actuator assembly)
Frequency of Operation	Continuous
Duration	0.12 seconds
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 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/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.

WIRING DIAGRAM

Refer to DTC C051212.

Click here

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a	Front view of skid control sensor wire RH (No. 1 parking brake wire assembly) (to Rear Speed Sensor RH (Rear Axle Hub and Bearing Assembly RH))

(b) Disconnect the o2 rear speed sensor RH (rear axle hub and bearing assembly RH) connector.

OK:

No deformation or corrosion.

(d) Turn the ignition switch to ON.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
o2-2 (RR+) - o2-1 (RR-)	Ignition switch ON	11 to 14 V

GO TO STEP 4

2.	INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

Front view of wire harness connector

(to Sensor Side Connector)

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the o2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
o2-1 (RR-) or oO2-2 (RR-) - Body ground and other terminals	Always	10 kΩ or higher

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

3.	CHECK HARNESS AND CONNECTOR (NO. 1 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
oO2-2 (RR-) or A51-37 (RR-) - Body ground	Always	10 kΩ or higher

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

for Double Wishbone Type Suspension: Click here

for Torsion Beam Type Suspension: Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

Front view of wire harness connector

(to Sensor Side Connector)

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the o2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
o2-1 (RR-) - oO2-2 (RR-)	Always	Below 1 Ω

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

5.	CHECK HARNESS AND CONNECTOR (NO. 1 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
oO2-2 (RR-) - A51-37 (RR-)	Always	Below 1 Ω

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR