Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000260RN
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): C050C1F; Left Rear Wheel Speed Sensor Circuit Intermittent; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]

DTC

C050C1F

Left Rear Wheel Speed Sensor Circuit Intermittent

DESCRIPTION

Refer to DTC C050C12.

Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): C050C12; Left Rear Wheel Speed Sensor Circuit Short to Battery

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C050C1F

Left Rear Wheel Speed Sensor Circuit Intermittent

Any of the following is detected:

  • When the +BS terminal voltage is 17.4 V or less, an open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.
  • When the +BS terminal voltage is 17.4 V or less at a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.
  • When the +BS terminal voltage is 17.4 V or less at a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.
  • Rear speed sensor LH
  • Speed sensor installation
  • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)

PROCEDURE

1.

READ VALUE USING GTS (RL WHEEL SPEED, MOMENTARY INTERRUPTION)

(a) While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): DATA LIST / ACTIVE TEST

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RL Wheel Speed

Rear wheel speed sensor LH reading

Min.: 0.0 km/h (0 mph)

Max.: 6553.5 km/h (4072 mph)

Vehicle stopped: 0.0 km/h (0.0 mph)

When driving at constant speed: No large fluctuations

RL Speed Open

Rear speed sensor LH open detection

Normal / Under intermittent

Normal: Momentary interruption not detected

Under intermittent: Momentary interruption detected

-

Chassis > Brake/EPB > Data List

Tester Display

RL Wheel Speed

RL Speed Open

OK:

The values change in accordance with the operation of the vehicle and there is no intermittent operation.

NOTICE:

Perform the above inspection before removing the sensor and connector.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK REAR SPEED SENSOR LH INSTALLATION

(a) Turn the ignition switch off.

*1

Rear Speed Sensor LH

*a

Correct

*b

Incorrect

*c

8.5 N*m (87 kgf*cm, 75 in.*lbf)

*d

No clearance

(b) Check the rear speed sensor LH installation.

OK:

There is no clearance between the rear speed sensor LH and the rear axle carrier LH.

The installation bolt is tightened properly.

Torque

8.5 N*m (87 kgf*cm, 75 in.*lbf)

NG

INSTALL REAR SPEED SENSOR LH CORRECTLY

OK

3.

CHECK REAR SPEED SENSOR LH (CHECK FOR FOREIGN MATTER)

(a) Remove the rear speed sensor LH, and confirm that there is no foreign matter, oil or grease on the rear speed sensor tip LH.

OK:

The rear speed sensor tip LH is free of oil and foreign matter.

HINT:

If foreign matter of 1mm x 1mm or more is adhered to the rear speed sensor LH, this DTC may be stored.

NG

GO TO STEP 7

OK

4.

CHECK REAR SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER)

(a) Confirm that there is no foreign matter, oil or grease on the rear speed sensor rotor LH.

OK:

The rear speed sensor rotor LH is free of oil and foreign matter.

HINT:

  • If foreign matter of 1mm x 1mm or more is adhered to the rear speed sensor rotor LH, this DTC may be stored.
  • The rear speed sensor rotor LH is incorporated into the rear axle hub and bearing assembly LH.
  • If the rear speed sensor rotor LH needs to be replaced, replace it together with the rear axle hub and bearing assembly LH.
OK

REPLACE REAR SPEED SENSOR LH AND REAR SPEED SENSOR ROTOR LH

for Rear Speed Sensor LH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: REAR SPEED SENSOR (for AWD): REMOVAL

for Rear Speed Sensor Rotor LH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AXLE AND DIFFERENTIAL: REAR AXLE HUB (for AWD without Electric Parking Brake): REMOVAL

NG

5.

CLEAN REAR SPEED SENSOR ROTOR LH

(a) Clean the rear speed sensor rotor LH.

NOTICE:

Do not use parts cleaner when cleaning the rear speed sensor rotor LH.

NEXT

6.

READ VALUE USING GTS (RL WHEEL SPEED, MOMENTARY INTERRUPTION)

(a) While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): DATA LIST / ACTIVE TEST

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RL Wheel Speed

Rear wheel speed sensor LH reading

Min.: 0.0 km/h (0 mph)

Max.: 6553.5 km/h (4072 mph)

Vehicle stopped: 0.0 km/h (0.0 mph)

When driving at constant speed: No large fluctuations

RL Speed Open

Rear speed sensor LH open detection

Normal / Under intermittent

Normal: Momentary interruption not detected

Under intermittent: Momentary interruption detected

-

Chassis > Brake/EPB > Data List

Tester Display

RL Wheel Speed

RL Speed Open

OK:

The values change in accordance with the operation of the vehicle and there is no intermittent operation.

NOTICE:

Perform the above inspection before removing the sensor and connector.

HINT:

  • The rear speed sensor rotor LH is incorporated into the rear axle hub and bearing assembly LH.
  • If the rear speed sensor rotor LH needs to be replaced, replace it together with the rear axle hub and bearing assembly LH.
OK

END
NG

REPLACE REAR SPEED SENSOR LH AND REAR SPEED SENSOR ROTOR LH

for Rear Speed Sensor LH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: REAR SPEED SENSOR (for AWD): REMOVAL

for Rear Speed Sensor Rotor LH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AXLE AND DIFFERENTIAL: REAR AXLE HUB (for AWD without Electric Parking Brake): REMOVAL

7.

CLEAN REAR SPEED SENSOR LH

(a) Clean the rear speed sensor LH.

NOTICE:

When cleaning the rear speed sensor LH, make sure to clean the installation hole before installation.

NEXT

8.

READ VALUE USING GTS (RL WHEEL SPEED, MOMENTARY INTERRUPTION)

(a) While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): DATA LIST / ACTIVE TEST

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RL Wheel Speed

Rear wheel speed sensor LH reading

Min.: 0.0 km/h (0 mph)

Max.: 6553.5 km/h (4072 mph)

Vehicle stopped: 0.0 km/h (0.0 mph)

When driving at constant speed: No large fluctuations

RL Speed Open

Rear speed sensor LH open detection

Normal / Under intermittent

Normal: Momentary interruption not detected

Under intermittent: Momentary interruption detected

-

Chassis > Brake/EPB > Data List

Tester Display

RL Wheel Speed

RL Speed Open

OK:

The values change in accordance with the operation of the vehicle and there is no intermittent operation.

NOTICE:

Perform the above inspection before removing the sensor and connector.

OK

END
NG

GO TO STEP 4