RM3660EC _54 Brake _080770 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0599814 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model (NR Series)) C

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model (NR Series)) 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
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)

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 store 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 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 0.469,0.75 0.781,0.948 0.313,0.198 10 false n2 2.021,1.802 2.417,2.021 0.396,0.219 10 false RL+ 1.313,1.792 1.708,2.01 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 n2 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
n2-2 (RL+) - n2-1 (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 2.083,1.75 1.844,1.146 true 0.208,0.188 0.521,0.385 0.313,0.198 10 false *a 0.469,0.75 0.781,0.948 0.313,0.198 10 false n2 2.021,1.802 2.417,2.021 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 n2 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.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
n2-2 (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 0.927,1.781 0.75,2.417 true 2.615,1.906 2.75,2.417 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 0.656,2.448 1.052,2.677 0.396,0.229 10 false RL- 0.979,0.646 1.271,0.844 0.292,0.198 10 false n2 2.365,0.656 2.729,0.833 0.365,0.177 10 false nO2 2.698,2.458 3.094,2.688 0.396,0.229 10 false RL-

*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)

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 n2 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
n2-1 (RL-) or nO2-2 (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 A51 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-) or A51-23 (RL-) - Body ground	Always	10 kΩ or higher

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 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 2.021,1.771 2.479,1.969 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
nO2-1 (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 A51 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

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 1.344,1.771 1.802,1.969 0.458,0.198 10 false RL- 2.021,1.771 2.479,1.969 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
nO2-1 (RL+) - nO2-2 (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
nO2-1 (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 1.438,1.729 1.604,1.229 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 1.344,1.771 1.802,1.969 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 A51 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

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 A51 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-) - A51-23 (RL-)	Always	Below 1 Ω
nO2-1 (RL+) or A51-39 (RL+) - nO2-2 (RL-) or A51-23 (RL-)	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

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 A51 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+) - A51-39 (RL+)	Always	Below 1 Ω
nO2-1 (RL+) or A51-39 (RL+) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR