Toyota Camry (XV70): Left Rear Wheel Speed Sensor Internal Electronic Failure (C050C49)

DESCRIPTION

When the system is starting up and the skid control ECU (brake actuator assembly) detects a speed sensor circuit malfunction via the speed sensor circuit self-diagnosis function, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C050C49	Left Rear Wheel Speed Sensor Internal Electronic Failure	A circuit malfunction in the speed sensor is detected during the self test.	Rear speed sensor LH (rear axle hub and bearing assembly LH)*1 Rear speed sensor LH*2 Wire harness or connector Skid control sensor wire LH (No. 2 parking brake wire assembly) Skid control ECU (brake actuator assembly)

*1: for 2WD

*2: for AWD

WIRING DIAGRAM

Refer to DTC C050C12.

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CAUTION / NOTICE / HINT

NOTICE:

• After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.

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• After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.

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PROCEDURE

1.	CHECK VEHICLE

(a) Check the vehicle specification.

Result	Proceed to
for 2WD	A
for AWD	B

B

GO TO STEP 13

A

2.	CHECK HARNESS AND CONNECTOR (SENSOR 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 LH (No. 2 parking brake wire assembly) (to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly LH))

(b) Disconnect the v2 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.

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

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
v2-2 (LA+) - v2-1 (LA-)	Ignition switch on	11 to 14 V

NG

GO TO STEP 8

OK

3.	CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 LH (No. 2 parking brake wire assembly) (to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly LH))

(b) Disconnect the v2 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.

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

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
v2-2 (LA+) - Body ground	Ignition switch off	Below 1.5 V

NG

GO TO STEP 6

OK

4.	INSPECT NO. 2 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.

*a Front view of skid control sensor wire LH (No. 2 parking brake wire assembly) *b Front view of wire harness connector (to Sensor Side Connector) *c Front view of wire harness connector (to Vehicle Side Connector)

(b) Disconnect the v2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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
v2-1 (LA-) or vR1-2 (RL-) - Body ground and other terminals	Always	10 kΩ or higher

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

5.	CHECK HARNESS AND CONNECTOR (NO. 2 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.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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
vR1-2 (RL-) or A34-23 (RL-) - Body ground	Always	10 kΩ or higher

OK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 LH (No. 2 Parking Brake Wire Assembly))

(b) Disconnect the vR1 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

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

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
vR1-1 (RL+) - Body ground	Ignition switch off	Below 1.5 V

OK

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

NG

7.	CHECK HARNESS AND CONNECTOR (NO. 2 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 LH (No. 2 Parking Brake Wire Assembly))

(b) Disconnect the A34 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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 voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
vR1-1 (RL+) - Body ground	Always	Below 1.5 V

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	CHECK HARNESS AND CONNECTOR (SENSOR 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 LH (No. 2 Parking Brake Wire Assembly))

(b) Disconnect the vR1 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

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

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
vR1-1 (RL+) - vR1-2 (RL-)	Ignition switch on	11 to 14 V

OK

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

NG

9.	CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 LH (No. 2 Parking Brake Wire Assembly))

(b) Disconnect the vR1 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

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

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
vR1-1 (RL+) - Body ground	Ignition switch on	11 to 14 V

NG

GO TO STEP 12

OK

10.	CHECK HARNESS AND CONNECTOR (NO. 2 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 LH (No. 2 Parking Brake Wire Assembly))

(b) Disconnect the A34 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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 voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
vR1-2 (RL-) - Body ground	Always	Below 1.5 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.	CHECK HARNESS AND CONNECTOR (NO. 2 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.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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
vR1-2 (RL-) - A34-23 (RL-)	Always	Below 1 Ω
vR1-1 (RL+) or A34-39 (RL+) - vR1-2 (RL-) or A34-23 (RL-)	Always	10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.	CHECK HARNESS AND CONNECTOR (NO. 2 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.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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
vR1-1 (RL+) - A34-39 (RL+)	Always	Below 1 Ω
vR1-1 (RL+) or A34-39 (RL+) - Body ground	Always	10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

13.	CHECK HARNESS AND CONNECTOR (SENSOR 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 LH (No. 2 parking brake wire assembly) (to Rear Speed Sensor LH)

(b) Disconnect the v2 rear speed sensor LH connector.

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

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
v2-2 (LA+) - v2-1 (LA-)	Ignition switch on	11 to 14 V

NG

GO TO STEP 8

OK

14.	CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 LH (No. 2 parking brake wire assembly) (to Rear Speed Sensor LH)

(b) Disconnect the v2 rear speed sensor LH connector.

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

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
v2-2 (LA+) - Body ground	Ignition switch off	Below 1.5 V

NG

GO TO STEP 6

OK

15.	INSPECT NO. 2 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.

*a Front view of skid control sensor wire LH (No. 2 parking brake wire assembly) *b Front view of wire harness connector (to Sensor Side Connector) *c Front view of wire harness connector (to Vehicle Side Connector)

(b) Disconnect the v2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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
v2-1 (LA-) or vR1-2 (RL-) - Body ground and other terminals	Always	10 kΩ or higher

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

16.	CHECK HARNESS AND CONNECTOR (NO. 2 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.

(c) Disconnect the vR1 skid control sensor wire LH (No. 2 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
vR1-2 (RL-) or A34-23 (RL-) - Body ground	Always	10 kΩ or higher

OK

REPLACE REAR SPEED SENSOR LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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