Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000025DTK
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C05121F; Right Rear Wheel Speed Sensor Circuit Intermittent; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

C05121F

Right Rear Wheel Speed Sensor Circuit Intermittent

DESCRIPTION

Refer to DTC C051212

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C051212; Right Rear Wheel Speed Sensor Circuit Short to Battery

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

Note

C05121F

Right Rear Wheel Speed Sensor Circuit Intermittent
  • The speed sensor signal is excessively noisy.
  • The calculated change in wheel speed is more than 980 m/s2 for 5*1 or 20*2 seconds or more.
  • The calculated change in wheel speed fluctuates between more than 500 m/s2 and less than -500 m/s2 for 5*1 or 20*2 seconds or more.
  • When the vehicle speed is low, excessive noise in the speed sensor pulse signal is detected 3 times or more within 0.005 seconds for 5*1 or 20*2 seconds or more.
  • Rear speed sensor RH*3
  • Rear speed sensor RH (rear axle hub and bearing assembly RH)*4
  • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)

Comes on

Brake/EPB
  • SAE Code: C0516 (Case 1 and 2)
  • Output ECU: Skid control ECU (brake actuator assembly)
  • *1: The stop light switch assembly is OFF.
  • *2: The stop light switch assembly is ON.
  • *3: for AWD
  • *4: for 2WD

MONITOR DESCRIPTION

C0516 (Case 1):

  • When any of the following conditions are met, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
    • The acceleration (change over a certain amount of time) of the respective wheel is more than a certain amount.
    • The amplitude of acceleration (change over a certain amount of time) is a certain amount or more.
    • Noise in the respective wheel speed pulse occurs a certain number of times or more.

C0516 (Case 2):

  • If extremely large noise occurs in the output signal from the speed sensor, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

*1: Influence of noise is recognized at 3 or 4 wheel speed sensor).

*2: The stop light switch assembly is OFF.

*3: The stop light switch assembly is ON.

Related DTCs

C0516 (Case 1): Wheel speed sensor noise monitoring (RR)

C0516 (Case 2): Wheel speed sensor direct memory access buffer noise monitoring for RR

Required Sensors/Components(Main)

Speed sensor

Skid control ECU (brake actuator assembly)

Required Sensors/Components(Related)

Skid control ECU (brake actuator assembly)

Frequency of Operation

Continuous

Duration

0.03 seconds: C0516 (Case 2)

1 second: C0516 (Case 1)*1

5 seconds: C0516 (Case 1)*2

20 seconds: C0516 (Case 1)*3

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

TMC's intellectual property

-

CONFIRMATION DRIVING PATTERN

NOTICE:

When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off.
  5. Turn the ignition switch to ON (READY) and turn the GTS on.
  6. Wait for 3 seconds or more. [*]

    HINT:

    [*]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  7. Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.

    *: Electric Parking Brake System

  8. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

NOTICE:

DTC precaution

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): PRECAUTION

Procedure to clear warning lights (When not clearing DTCs)

Procedure
  1. Repair or replacement.
  2. Turn the ignition switch to ON.
  3. Drive the vehicle at 54 km/h (34 mph) or more for 3 seconds or more to clear the warning lights.

PROCEDURE

1.

CHECK VEHICLE

(a) Check the vehicle specification.

HINT:

The rear speed sensor rotor RH and rear speed sensor RH are incorporated into the rear axle hub and bearing assembly RH. (for 2WD)

If the rear speed sensor rotor RH and rear speed sensor RH need to be replaced, replace them together with the rear axle hub and bearing assembly RH. (for 2WD)

Result

Proceed to

for AWD

A

for 2WD

B
B

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

A

2.

CHECK REAR SPEED SENSOR RH (CHECK FOR FOREIGN MATTER)

(a) Remove the rear speed sensor RH.

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

(b) Check the rear speed sensor RH.

OK:

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

HINT:

If foreign matter of 1 mm (0.03937 in.) x 1 mm (0.03937 in.) or more is adhered to the rear speed sensor, this DTC may be stored.

NG

GO TO STEP 8

OK

3.

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

(a) Remove the component with the rear speed sensor rotor RH.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AXLE AND DIFFERENTIAL: REAR AXLE HUB (for AWD with Electric Parking Brake): REMOVAL

(b) Check the rear speed sensor rotor RH.

OK:

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

HINT:

  • If foreign matter of 1 mm (0.03937 in.) x 1 mm (0.03937 in.) or more is adhered to the rear speed sensor, this DTC may be stored.
  • The rear speed sensor rotor is incorporated into the rear axle hub and bearing assembly RH.

    If the rear speed sensor rotor RH needs to be replaced, replace it together with the rear axle hub and bearing assembly RH.

OK

REPLACE REAR SPEED SENSOR RH AND REAR SPEED SENSOR ROTOR RH

for rear speed sensor RH: 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 RH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AXLE AND DIFFERENTIAL: REAR AXLE HUB (for AWD with Electric Parking Brake): REMOVAL

NG

4.

CLEAN REAR SPEED SENSOR ROTOR RH

(a) Clean the rear speed sensor rotor RH.

NOTICE:

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

NEXT

5.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

6.

PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK)

(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

Chassis > Brake/EPB > Utility

Tester Display

Signal Check

OK:

Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

HINT:

The rear speed sensor rotor RH is incorporated into the rear axle hub and bearing assembly RH.

If the rear speed sensor rotor RH needs to be replaced, replace it together with the rear axle hub and bearing assembly RH.

NG

REPLACE REAR SPEED SENSOR RH AND REAR SPEED SENSOR ROTOR RH

for rear speed sensor RH: 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 RH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AXLE AND DIFFERENTIAL: REAR AXLE HUB (for AWD with Electric Parking Brake): REMOVAL

OK

7.

RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes

HINT:

The rear speed sensor rotor RH is incorporated into the rear axle hub and bearing assembly RH.

If the rear speed sensor rotor RH needs to be replaced, replace it together with the rear axle hub and bearing assembly RH.

Result

Proceed to

C05121F is not output

A

C05121F is output

B
A

END
B

REPLACE REAR SPEED SENSOR RH AND REAR SPEED SENSOR ROTOR RH

for rear speed sensor RH: 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 RH: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AXLE AND DIFFERENTIAL: REAR AXLE HUB (for AWD with Electric Parking Brake): REMOVAL

8.

CLEAN REAR SPEED SENSOR RH

(a) Clean the rear speed sensor RH.

NOTICE:

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

NEXT

9.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

10.

PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK)

(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

Chassis > Brake/EPB > Utility

Tester Display

Signal Check

OK:

Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

NG

GO TO STEP 3

OK

11.

RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

C05121F is not output

A

C05121F is output

B
A

END
B

GO TO STEP 3