DTC C0512-14: Right Rear Wheel Speed Sensor Circuit Short to Ground or Open [12/2021 - ]: Procedure

1. Select the line graph display on the GTS.
2. Check for any momentary interruption in the wire harness and connector.

   Refer to DATA LIST / ACTIVE TEST [12/2021 - ]

   Chassis > Brake/EPB > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   RR Speed Open	Momentary interruption of rear skid control sensor RH pulse input to ECU	Normal / Under intermittent	Normal: Normal Under intermittent: Momentary interruption	-
   RR Speed Sensor Voltage Open	Rear skid control sensor RH voltage open detection	Normal / Under intermittent	Normal: Normal Under intermittent: Momentary interruption	-

   Chassis > Brake/EPB > Data List 

   Tester Display
   RR Speed Open
   RR Speed Sensor Voltage Open

   OK

   Normal (There are no momentary interruptions.)

   NOTE:

   Perform the above inspection before removing the sensor and connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

NG 

See step  2

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)
   *b	to Sensor Side Connector
   *c	to Vehicle Side Connector

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

   OK

   The connector is securely connected.

3. Disconnect the M50 and MM4 skid control sensor wire RH (No. 1 parking brake wire assembly) 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

   Tester Connection	Condition	Specified Condition
   M50-2 (+) - MM4-3	Always	Below 1 Ω
   M50-2 (+) or MM4-3 - Body ground and other terminals	Always	10 kΩ or higher
   M50-1 (-) - MM4-4	Always	Below 1 Ω
   M50-1 (-) or MM4-4 - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY 

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 A105 No. 2 skid control ECU (brake actuator assembly) connector.
3. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   MM4-3 - A105-20 (RR+)	Always	Below 1 Ω
   MM4-3 or A105-20 (RR+) - Body ground	Always	10 kΩ or higher
   MM4-4 - A105-19 (RR-)	Always	Below 1 Ω
   MM4-4 or A105-19 (RR-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Reconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of skid control sensor wire RH (No. 1 parking brake wire assembly) (to Rear Skid Control Sensor RH)

2. Reconnect the MM4 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.
3. Turn the ignition switch to ON.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   M50-2 (+) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE REAR SKID CONTROL SENSOR RH. Refer to  REMOVAL [11/2018 - ] 

Result: 

NG 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [12/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ]