RM38T0EC _54 Brake _112606 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0608077 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model) C

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model) C050C49 Left Rear Wheel Speed Sensor Internal Electronic Failure

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	MIL	DTC Output from	Note
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) · Wire harness or connector · Skid control sensor wire LH (No. 2 parking brake wire assembly) · Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	· SAE Code: C050C (Case 1) · Output ECU: Skid control ECU (brake actuator assembly)

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

Refer to DTC C050C12.

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PROCEDURE

1.CHECK HARNESS AND CONNECTOR (SENSOR CIRCUIT)

0.354,0.677 0.74,0.948 0.385,0.271 2.083,1.75 1.844,1.146 true 1.417,1.75 1.594,1.146 true 0.208,0.188 0.521,0.385 0.313,0.198 10 false *a 0.469,0.729 0.781,0.927 0.313,0.198 10 false n3 2.042,1.802 2.438,2.021 0.396,0.219 10 false RL+ 1.302,1.792 1.698,2.01 0.396,0.219 10 false RL-

*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))

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

OK:: The connector is securely connected.

Disconnect the n3 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
n3-2 (RL+) - n3-1 (RL-)	Ignition switch ON	11 to 14 V

Result:

Proceed to
OK
NG

2.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT)

7.CHECK HARNESS AND CONNECTOR (SENSOR CIRCUIT)

2.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT)

0.354,0.677 0.74,0.948 0.385,0.271 2.083,1.781 1.844,1.156 true 0.208,0.188 0.521,0.385 0.313,0.198 10 false *a 0.469,0.719 0.781,0.917 0.313,0.198 10 false n3 2.031,1.833 2.427,2.052 0.396,0.219 10 false RL+

*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))

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

OK:: The connector is securely connected.

Disconnect the n3 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
n3-2 (RL+) - Body ground	Ignition switch off	Below 1.5 V

Result:

Proceed to
OK
NG

3.INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

5.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT)

3.INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

0.833,0.583 1.25,0.833 0.417,0.25 2.281,0.583 2.698,0.833 0.417,0.25 0.948,1.781 0.74,2.49 true 2.365,1.906 2.24,2.448 true 0.25,0.208 0.563,0.365 0.313,0.156 10 false *a 0.99,0.99 1.302,1.146 0.313,0.156 10 false *b 2.406,0.99 2.719,1.146 0.313,0.156 10 false *c 0.573,2.49 0.969,2.719 0.396,0.229 10 false RL- 0.979,0.625 1.271,0.823 0.292,0.198 10 false n3 2.365,0.615 2.729,0.792 0.365,0.177 10 false nO2 2.115,2.469 2.51,2.698 0.396,0.229 10 false RL-

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

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

OK:: The connector is securely connected.

Disconnect the n3 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
n3-1 (RL-) or nO2-1 (RL-) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

4.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

4.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

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

OK:: The connector is securely connected.

Disconnect the A151 skid control ECU (brake actuator assembly) connector.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
nO2-1 (RL-) or A151-23 (RL-) - Body ground	Always	10 kΩ or higher

HINT:: The rear speed sensor rotor LH and rear speed sensor LH are incorporated into the rear axle hub and bearing assembly LH.; If the rear speed sensor rotor LH and rear speed sensor LH need to be replaced, replace them together with the rear axle hub and bearing assembly LH.

Result:

Proceed to
OK
NG

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

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REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT)

0.49,0.75 0.906,1.042 0.417,0.292 1.427,1.76 1.604,1.198 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 0.563,0.802 1.021,1 0.458,0.198 10 false nO2 1.146,1.708 1.604,1.906 0.458,0.198 10 false RL+

*a	Front view of wire harness connector (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

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

OK:: The connector is securely connected.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
nO2-2 (RL+) - Body ground	Ignition switch off	Below 1.5 V

Result:

Proceed to
OK
NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

6.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

*a	Front view of wire harness connector (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

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

OK:: The connector is securely connected.

Disconnect the A151 skid control ECU (brake actuator assembly) connector.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
nO2-2 (RL+) - Body ground	Always	Below 1.5 V

Result:

Proceed to
OK
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

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REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (SENSOR CIRCUIT)

0.49,0.75 0.906,1.042 0.417,0.292 1.438,1.729 1.604,1.229 true 2.073,1.729 1.823,1.229 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 0.583,0.823 1.042,1.021 0.458,0.198 10 false nO2 2.115,1.74 2.573,1.938 0.458,0.198 10 false RL- 1.198,1.74 1.656,1.938 0.458,0.198 10 false RL+

*a	Front view of wire harness connector (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

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

OK:: The connector is securely connected.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
nO2-2 (RL+) - nO2-1 (RL-)	Ignition switch ON	11 to 14 V

Result:

Proceed to
OK
NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

8.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT)

*a	Front view of wire harness connector (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

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

OK:: The connector is securely connected.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
nO2-2 (RL+) - Body ground	Ignition switch ON	11 to 14 V

Result:

Proceed to
OK
NG

9.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

11.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

9.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

0.49,0.75 0.906,1.042 0.417,0.292 2.052,1.719 1.833,1.198 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 0.583,0.823 1.042,1.021 0.458,0.198 10 false nO2 2.104,1.688 2.563,1.885 0.458,0.198 10 false RL-

*a	Front view of wire harness connector (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

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

OK:: The connector is securely connected.

Disconnect the A151 skid control ECU (brake actuator assembly) connector.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
nO2-1 (RL-) - Body ground	Always	Below 1.5 V

Result:

Proceed to
OK
NG

10.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

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

OK:: The connector is securely connected.

Disconnect the A151 skid control ECU (brake actuator assembly) connector.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
nO2-1 (RL-) - A151-23 (RL-)	Always	Below 1 Ω
nO2-2 (RL+) or A151-39 (RL+) - nO2-1 (RL-) or A151-23 (RL-)	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

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REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

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

OK:: The connector is securely connected.

Disconnect the A151 skid control ECU (brake actuator assembly) connector.

Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Check both the connector case and the terminals for deformation and corrosion.

OK:: No deformation or corrosion.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
nO2-2 (RL+) - A151-39 (RL+)	Always	Below 1 Ω
nO2-2 (RL+) or A151-39 (RL+) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

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REPAIR OR REPLACE HARNESS OR CONNECTOR