BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/ Electric Parking Brake System): C051212; Right Rear Wheel Speed Sensor Circuit Short to Battery; 2021 - 2024 MY Camry [10/2020

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM100000001SARA
Model Year Start: 2021	Model: Camry	Prod Date Range: [10/2020 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/ Electric Parking Brake System): C051212; Right Rear Wheel Speed Sensor Circuit Short to Battery; 2021 - 2024 MY Camry [10/2020 - ]

DTC

C051212

Right Rear Wheel Speed Sensor Circuit Short to Battery

DESCRIPTION

Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS 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
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 (rear axle hub and bearing assembly RH)1 Rear speed sensor RH2 Wire harness or connector Skid control sensor wire RH (No. 1 parking brake wire assembly) Skid control ECU (brake actuator assembly)

*1: for 2WD

*2: for AWD

WIRING DIAGRAM

for 2WD

for AWD

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.
Click here
After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
Click here

PROCEDURE

1.	CHECK VEHICLE

(a) Check the vehicle specification.

Result	Proceed to
for 2WD	A
for AWD	B

GO TO STEP 6

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 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 u2 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
u2-2 (RA+) - u2-1 (RA-)	Ignition switch on	11 to 14 V

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

3.	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 uR1 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
uR1-1 (RR+) - uR1-2 (RR-)	Ignition switch on	11 to 14 V

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

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.

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

(b) Disconnect the A34 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
uR1-2 (RR-) - Body ground	Always	Below 1.5 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

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 A34 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
uR1-1 (RR+) or A34-22 (RR+) - uR1-2 (RR-) or A34-37 (RR-)	Always	10 kΩ or higher

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	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 u2 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
u2-2 (RA+) - u2-1 (RA-)	Ignition switch on	11 to 14 V

REPLACE REAR SPEED SENSOR RH

GO TO STEP 3