Toyota Corolla Cross: Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)

Toyota Corolla Cross (2022-2024) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Hev Model) / Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)

DESCRIPTION

Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the brake control.

The speed sensor detects the magnetic fields of the speed sensor rotor as it rotates and outputs a pulse signal.

The frequency of the pulse varies in accordance with the rotational speed of the speed sensor rotor and the system uses this to determine the wheel speed.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C051212	Right Rear Wheel Speed Sensor Circuit Short to Battery	A short to +B in the speed sensor signal circuit is detected for 0.12 seconds or more.	Rear speed sensor RH Wire harness or connector Skid control sensor wire RH (No. 1 parking brake wire assembly) Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C0515 (Case 1) Output ECU: Skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

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 exceeds a certain value, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	C0515: Wheel speed sensor line monitoring for RR (signal line short to BATT)
Required Sensors/Components(Main)	Skid control ECU (brake actuator assembly)
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 (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/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

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)

(b) Disconnect the o4 rear speed sensor 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
o4-1 (RR+) - o4-2 (RR-)	Ignition switch ON	11 to 14 V

REPLACE REAR SPEED SENSOR RH

2.	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 wire harness connector (to Skid Control Sensor Wire RH (No. 1 Parking Brake Wire Assembly))

(b) Disconnect the oO2 skid control sensor wire RH (No. 1 parking brake wire assembly) 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
oO2-2 (RR+) - oO2-1 (RR-)	Ignition switch ON	11 to 14 V

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.

*a	Front view of wire harness connector (to Skid Control Sensor Wire RH (No. 1 Parking Brake Wire Assembly))

(b) Disconnect the A151 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 voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
oO2-1 (RR-) - Body ground	Always	Below 1.5 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	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 A151 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 A151-22 (RR+) - oO2-1 (RR-) or A151-37 (RR-)	Always	10 kΩ or higher

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

SEE MORE:

Generator Temperature Sensor Voltage Out of Range (P0A361C,P0A361F)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs are stored when the generator temperature sensor output is abnormal. The cause of this malfunction may be one of the following: Generator temperature sensor malfunction Internal generator temperature sensor malfunction Open or short in gener

Installation

INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION) Procedure Part Name Code 1 FRONT NO. 1 SPEAKER ASSEMBLY 86160 - - 2 FRONT DOOR TRI

Toyota Corolla Cross: Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)

READ NEXT:

Right Rear Wheel Speed Sensor Circuit Short to Ground or Open (C051214)

Right Rear Wheel Speed Sensor Circuit Voltage Out of Range (C05121C)

Right Rear Wheel Speed Sensor Circuit Intermittent (C05121F)

SEE MORE:

Generator Temperature Sensor Voltage Out of Range (P0A361C,P0A361F)

Installation