RM38N0EC _54 Brake _111814 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0503031 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model) C

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model) C050C12 Left 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	DTC Output from	Priority
C050C12	Left 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 LH · Wire harness or connector · Skid control sensor wire LH (No. 2 parking brake wire assembly) · Skid control ECU (brake actuator assembly)	Brake/EPB	A

WIRING DIAGRAM

0.76,2.219 2.229,2.427 1.469,0.208 10 false Rear Speed Sensor LH 2.354,2.219 4.552,2.583 2.198,0.365 10 false Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly) 5.25,3.125 6.813,3.5 1.563,0.375 10 false Skid Control ECU (Brake Actuator Assembly) 5.26,1.229 5.573,1.427 0.313,0.198 10 false RL+ 3.219,1.104 3.531,1.302 0.313,0.198 10 false RL+ 1.635,1.115 1.948,1.313 0.313,0.198 10 false LA+ 2.448,1.135 2.906,1.333 0.458,0.198 10 false LA+ 1.646,1.792 1.948,1.99 0.302,0.198 10 false LA- 2.448,1.823 2.906,2.021 0.458,0.198 10 false LA- 3.24,1.792 3.521,1.99 0.281,0.198 10 false RL- 5.271,1.906 5.563,2.094 0.292,0.188 10 false RL- 2.063,1.094 2.25,1.271 0.188,0.177 10 false k2 2.063,1.792 2.26,1.979 0.198,0.188 10 false k2 3.625,1.104 3.896,1.313 0.271,0.208 10 false kL1 3.625,1.792 3.906,1.99 0.281,0.198 10 false kL1 2.104,1.604 2.406,1.833 0.302,0.229 10 false 1 5.271,2.969 5.563,3.156 0.292,0.188 10 false A40 2.104,0.927 2.406,1.156 0.302,0.229 10 false 2 3.708,0.927 4.01,1.156 0.302,0.229 10 false 3 3.719,1.625 4.021,1.854 0.302,0.229 10 false 4 4.99,1.01 5.198,1.219 0.208,0.208 10 false 39 4.99,1.688 5.208,1.885 0.219,0.198 10 false 23

PROCEDURE

1.CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

Procedure1

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

OK:: The connector is securely connected.

Pre-procedure1

Disconnect the k2 rear speed sensor LH connector.

Procedure2

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

OK:: No deformation or corrosion.

Pre-procedure2

Turn the ignition switch to ON.

Procedure3

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(k2)Location & Routingewd_type=routing;type=c;code=k2 Click Connector(k2)Body>Parking Brake Wire Assy>Rear Speed Sensor LHewd_type=component;type=c;code=k2;pinno=2,1
k2-2 (LA+) - k2-1 (LA-)	Ignition switch ON	11 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(k2)Location & Routingewd_type=routing;type=c;code=k2

Click Connector(k2)Body>Parking Brake Wire Assy>Rear Speed Sensor LHewd_type=component;type=c;code=k2;pinno=2,1

k2-2 (LA+) - k2-1 (LA-)

Ignition switch ON

11 to 14 V

HINT:: The rear speed sensor LH (for 2WD) and rear speed sensor rotor LH are incorporated into the rear axle hub and bearing assembly LH.; If the rear speed sensor LH (for 2WD) and rear speed sensor rotor LH need to be replaced, replace the rear axle hub and bearing assembly LH.

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE REAR SPEED SENSOR LH

for 2WD: Click hereDrivetrain>AXLE AND DIFFERENTIAL>REAR AXLE HUB (for 2WD)>REMOVAL202203,202303,_52,_111808,_0501217,RM1000000022EDC,202303,999999,_52,_111808,_0501217,RM100000002B3B5,

for AWD: Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>REAR SPEED SENSOR (for AWD)>REMOVAL202111,202303,_54,_111814,_0500730,RM100000001Z381,202303,999999,_54,_111814,_0500730,RM100000002B2O6,

2.CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

Procedure1

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

OK:: The connector is securely connected.

Pre-procedure1

Disconnect the kL1 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Procedure2

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

OK:: No deformation or corrosion.

Pre-procedure2

Turn the ignition switch to ON.

Procedure3

1.51,0.167 1.927,0.417 0.417,0.25 1.229,1.854 1.583,1.573 true 2.198,1.885 1.865,1.573 true 0.167,0.167 0.5,0.417 0.333,0.25 10 false *a 1.625,0.208 2.042,0.458 0.417,0.25 10 false kL1 1.073,1.885 1.438,2.104 0.365,0.219 10 false RL- 2.24,1.906 2.604,2.125 0.365,0.219 10 false RL+

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(kL1)Location & Routingewd_type=routing;type=w;code=kL1 Click Connector(kL1)Body>Parking Brake Wire Assy>Parking Brake Wire Assembly LH and No. 2 Floor Wireewd_type=component;type=w;code=kL1;pinno=3,4
kL1-3 (RL+) - kL1-4 (RL-)	Ignition switch ON	11 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(kL1)Location & Routingewd_type=routing;type=w;code=kL1

Click Connector(kL1)Body>Parking Brake Wire Assy>Parking Brake Wire Assembly LH and No. 2 Floor Wireewd_type=component;type=w;code=kL1;pinno=3,4

kL1-3 (RL+) - kL1-4 (RL-)

Ignition switch ON

11 to 14 V

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

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

Procedure1

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

OK:: The connector is securely connected.

Pre-procedure1

Disconnect the A40 skid control ECU (brake actuator assembly) connector.

Disconnect the kL1 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Procedure2

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

OK:: No deformation or corrosion.

Procedure3

1.51,0.167 1.927,0.417 0.417,0.25 1.229,1.854 1.583,1.573 true 0.167,0.167 0.5,0.417 0.333,0.25 10 false *a 1.625,0.208 2.042,0.458 0.417,0.25 10 false kL1 1.073,1.885 1.438,2.104 0.365,0.219 10 false RL-

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(kL1)Location & Routingewd_type=routing;type=w;code=kL1 Click Connector(kL1)Body>Parking Brake Wire Assy>Parking Brake Wire Assembly LH and No. 2 Floor Wireewd_type=component;type=w;code=kL1;pinno=4
kL1-4 (RL-) - Body ground	Always	Below 1.5 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(kL1)Location & Routingewd_type=routing;type=w;code=kL1

Click Connector(kL1)Body>Parking Brake Wire Assy>Parking Brake Wire Assembly LH and No. 2 Floor Wireewd_type=component;type=w;code=kL1;pinno=4

kL1-4 (RL-) - Body ground

Always

Below 1.5 V

Result:

Proceed to
OK
NG

Post-procedure1

None

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Procedure1

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

OK:: The connector is securely connected.

Pre-procedure1

Disconnect the A40 skid control ECU (brake actuator assembly) connector.

Disconnect the kL1 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

Procedure2

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

OK:: No deformation or corrosion.

Procedure3

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(kL1,A40)Location & Routingewd_type=routing;type=w,c;code=kL1,A40 Click Connector(kL1)Body>Parking Brake Wire Assy>Parking Brake Wire Assembly LH and No. 2 Floor Wireewd_type=component;type=w;code=kL1;pinno=3,4 Click Connector(A40)Engine Compartment>Engine Room Main Wire / Transmission Wire>Brake Actuator Assemblyewd_type=component;type=c;code=A40;pinno=39,23
kL1-3 (RL+) or A40-39 (RL+) - kL1-4 (RL-) or A40-23 (RL-)	Always	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(kL1,A40)Location & Routingewd_type=routing;type=w,c;code=kL1,A40

Click Connector(kL1)Body>Parking Brake Wire Assy>Parking Brake Wire Assembly LH and No. 2 Floor Wireewd_type=component;type=w;code=kL1;pinno=3,4

Click Connector(A40)Engine Compartment>Engine Room Main Wire / Transmission Wire>Brake Actuator Assemblyewd_type=component;type=c;code=A40;pinno=39,23

kL1-3 (RL+) or A40-39 (RL+) - kL1-4 (RL-) or A40-23 (RL-)

Always

10 kΩ or higher

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR (for Gasoline Model)>REMOVAL202203,202303,_54,_111814,_0500728,RM1000000022E3W,202303,999999,_54,_111814,_0500728,RM100000002B2O5,

REPAIR OR REPLACE HARNESS OR CONNECTOR