DTC C050C-12: Left Rear Wheel Speed Sensor Circuit Short to Battery [11/2021 - ]: Procedure

1. Check the vehicle specification.

   Result

   Result	Proceed to
   for AWD	A
   for 2WD	B

Result: 

B 

See step  6

Result: 

A 

See step  2

Procedure1

1. 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

2. Disconnect the f5 rear speed sensor LH connector.

   Procedure2

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

   OK

   No deformation or corrosion.

   Pre-procedure2

4. Turn the ignition switch to ON.

   Procedure3

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   f5-1 (LA+) - f5-2 (LA-)	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

   Post-procedure1

6. None

Result: 

OK 

REPLACE REAR SPEED SENSOR LH. Refer to  REMOVAL [11/2021 - 03/2024]  , or refer to  REMOVAL [03/2024 - ] 

Result: 

NG 

See step  3

Procedure1

1. 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

2. Disconnect the fG3 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

   Procedure2

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

   OK

   No deformation or corrosion.

   Pre-procedure2

4. Turn the ignition switch to ON.

   Procedure3

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   fG3-4 (RL+) - fG3-3 (RL-)	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Post-procedure1

6. None

Result: 

OK 

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY 

Result: 

NG 

See step  4

Procedure1

1. 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

2. Disconnect the A36 skid control ECU (brake actuator assembly) connector.
3. Disconnect the fG3 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

   Procedure2

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

   OK

   No deformation or corrosion.

   Procedure3

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   fG3-3 (RL-) - Body ground	Always	Below 1.5 V

   Result

   Proceed to
   OK
   NG

   Post-procedure1

6. None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Procedure1

1. 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

2. Disconnect the A36 skid control ECU (brake actuator assembly) connector.
3. Disconnect the fG3 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

   Procedure2

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

   OK

   No deformation or corrosion.

   Procedure3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   fG3-4 (RL+) or A36-39 (RL+) - fG3-3 (RL-) or A36-23 (RL-)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

6. None

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   OK

   The connector is securely connected.

2. Disconnect the f5 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.
3. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

4. Turn the ignition switch to ON.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   f5-2 (LA+) - f5-1 (LA-)	Ignition switch ON	11 to 14 V

   HINT: 

   The rear speed sensor LH and rear speed sensor rotor LH are incorporated into the rear axle hub and bearing assembly LH.

   If the rear speed sensor LH and rear speed sensor rotor LH need to be replaced, replace the rear axle hub and bearing assembly LH.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH. Refer to  REMOVAL [11/2021 - 03/2024]  , or refer to  REMOVAL [03/2024 - ] 

Result: 

NG 

See step  3