DTC C0500-12: Left Front Wheel Speed Sensor Circuit Short to Battery; DTC C0506-12: Right Front Wheel Speed Sensor Circuit Short to Battery [11/2018 - ]: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	for LH
   *B	for RH
   *a	Front view of wire harness connector (to Front Speed Sensor)

   OK

   The connector is securely connected.

2. Disconnect the A91 or A92 front speed sensor 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

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   A92-1 (FL+) - A92-2 (FL-)	Ignition switch ON	11 to 14 V

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   A91-1 (FR+) - A91-2 (FR-)	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT SPEED SENSOR. Refer to  REMOVAL [11/2018 - ] 

Result: 

NG 

See step  2

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	for LH
   *B	for RH
   *a	Front view of wire harness connector (to Front Speed Sensor)

   OK

   The connector is securely connected.

2. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
3. Disconnect the A91 or A92 front speed sensor connector.
4. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

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

   Standard Voltage

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   A92-2 (FL-) - Body ground	Always	Below 1.5 V

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   A91-2 (FR-) - Body ground	Always	Below 1.5 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

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 A39 skid control ECU (brake actuator assembly) connector.
3. Disconnect the A91 or A92 front speed sensor connector.
4. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

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

   Standard Resistance

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   A92-1 (FL+) or A39-24 (FL+) - A92-2 (FL-) or A39-7 (FL-)	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   A91-1 (FR+) or A39-21 (FR+) - A91-2 (FR-) or A39-26 (FR-)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [11/2018 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR