Toyota Yaris: Vehicle Stability Control System / Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)

DESCRIPTION

Refer to DTC C05121F.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

C051212

Right Rear Wheel Speed Sensor Circuit Short to Battery

The speed sensor short signal is ON continuously for 0.5 seconds or more.

  • Rear speed sensor RH
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

Brake

WIRING DIAGRAM

Refer to DTC C05121F.

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CAUTION / NOTICE / HINT

NOTICE:

  • After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

    Click here

  • After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.

    Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

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

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Rear Speed Sensor RH)

(b) Disconnect the O116 rear speed sensor RH connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O116-2 (RR+) - O116-1 (RR-)

Ignition switch ON

11 to 14 V

OK

REPLACE REAR SPEED SENSOR RH

NG

2.

CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

(a) Turn the ignition switch off.

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

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Rear Speed Sensor RH)

(c) Disconnect the A108 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O116-1 (RR-) - Body ground

Always

Below 1.5 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (REAR SPEED SENSOR RH - BRAKE ACTUATOR ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O116-2 (RR+) or A108-16 (RR+) - O116-1 (RR-) or A108-15 (RR-)

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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    Categories

    Turning the Engine Off

    Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.

    Automatic transaxle: Shift the selector lever to the P position and set the parking brake.

    Press the push button start to turn off the engine. The ignition position is off.

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