BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C050C1C; Left Rear Wheel Speed Sensor Circuit Voltage Out of Range; 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002D0E7
Model Year Start: 2024	Model: GR Corolla	Prod Date Range: [08/2023 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C050C1C; Left Rear Wheel Speed Sensor Circuit Voltage Out of Range; 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023 - ]

DTC

C050C1C

Left Rear Wheel Speed Sensor Circuit Voltage Out of Range

DESCRIPTION

Refer to DTC C050C12

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
C050C1C	Left Rear Wheel Speed Sensor Circuit Voltage Out of Range	When the vehicle is being driven in a straight line at a speed of 20 km/h (12 mph) or more and VSC/TRAC has permission to control vehicle braking, one of the following conditions is met when the difference between the highest wheel speed and the lowest wheel speed is 6% or more1 for between 9 and 72 seconds or more (period changes depending on vehicle conditions): When the difference between the highest wheel speed and the second highest wheel speed is 5 km/h (3 mph) or more, the wheel speed is high compared to other speed sensors. The value of the wheel speed is continuously the slowest. When the wheel speed is less than 5 km/h (3 mph). When the vehicle speed is less than 100 km/h (62 mph), one of the following conditions is met when the difference between the highest wheel speed and the lowest wheel speed is 6 km/h (4 mph) or more2 for between 9 and 72 seconds or more (period changes depending on vehicle conditions): When the difference between the highest wheel speed and the second highest wheel speed is 5 km/h (3 mph) or more, the wheel speed is high compared to other speed sensors. The value of the wheel speed is continuously the slowest. When the wheel speed is less than 5 km/h (3 mph). When the vehicle speed is 100 km/h (62 mph) or more, one of the following conditions is met when the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 for between 9 and 72 seconds or more (period changes depending on vehicle conditions): When the difference between the highest wheel speed and the second highest wheel speed is 5 km/h (3 mph) or more, the wheel speed is high compared to other speed sensors. The value of the wheel speed is continuously the slowest. When the wheel speed is less than 5 km/h (3 mph).	Rear speed sensor LH (rear axle hub and bearing assembly LH) Rear speed sensor rotor LH (rear axle hub and bearing assembly LH) Speed sensor installation Tire wear Tire pressure Tire and wheel size	Comes on	SAE Code: C050D (Case 2 and 3)

*1: When more than 1 wheel has a wheel speed of less than 5 km/h (3 mph), a difference of 15% is permitted.

*2: When more than 1 wheel has a wheel speed of less than 5 km/h (3 mph), a difference of 16 km/h (10 mph) is permitted.

MONITOR DESCRIPTION

C050D (Case 2):

When the vehicle is being driven straight at a certain speed or more and any of the following conditions are met, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- The lowest speed sensor value is a certain value or more, and the difference between the lowest speed sensor value and the highest speed sensor value is a certain value or more.
- The lowest speed sensor value is a certain value or less, the difference between the lowest speed sensor value and the highest speed sensor value is a certain value or more, the second highest speed sensor value is a certain value or more, the rear left speed sensor value is the highest speed, and the difference between the highest speed sensor value and the second highest speed sensor value is more than the difference between the second highest speed sensor value and the lowest speed sensor value.
- The rear left speed sensor value is the lowest value and the difference between the third highest speed sensor value and lowest speed sensor value is more than the difference between the highest speed sensor value and the third highest speed sensor value.
- The rear left speed sensor value is a certain value or less.

C050D (Case 3):

When the vehicle speed is less than a certain value or the vehicle is being driven straight and any of the following conditions are met, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- The vehicle speed is less than a certain value, the lowest speed sensor value is a certain value or more and the difference between the lowest speed sensor value and the highest speed sensor value is more than a certain value.
- The vehicle speed is less than a certain value, the lowest speed sensor value is less than a certain value, and the difference between the lowest speed sensor value and the highest speed sensor value is more than a certain value.
- The vehicle speed is a certain value or more, the lowest speed sensor value is more than a certain value, and the difference between the lowest speed sensor value and the highest speed sensor value is a certain value or more.
- The vehicle speed is a certain value or more, the lowest speed sensor value is less than a certain value, the difference between the lowest speed sensor value and the highest speed sensor value is a certain value or more, the second highest speed sensor value is more than a certain value, the rear left speed sensor value is the highest speed, the difference between the highest speed sensor value and the second highest speed sensor value is more than the difference between the second highest speed sensor value and the lowest speed sensor value.
- The rear left speed sensor value is the lowest value and the difference between the third highest speed sensor value and lowest speed sensor value is more than the difference between the highest speed sensor value and the third highest speed sensor value.
- The rear left speed sensor value is a certain value or less.

MONITOR STRATEGY

Related DTCs	C050D (Case 2): Wheel speed sensor slip monitoring (allocable) (RL) C050D (Case 3): Wheel speed sensor slip monitoring (allocable) (RL)
Required Sensors/Components(Main)	Speed sensor
Required Sensors/Components(Related)	Skid control ECU (brake actuator assembly)Speed sensor Yaw rate sensor (airbag sensor assembly)
Frequency of Operation	Continuous
Duration	9 to 72 seconds (depending on the driving situation)
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.

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off.
Turn the ignition switch to ON and turn the GTS on.
Wait for 1 second or more. [*]
HINT:

[*]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
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

Procedure to clear warning lights (When not clearing DTCs)

Procedure
Repair or replacement. Turn the ignition switch to ON. Drive the vehicle at 11 km/h (7 mph) or more for 1 second or more to clear the warning lights.

PROCEDURE

PRE-CHECK

(a) Check that all 4 tires are of correct size, are inflated to the correct pressure, and do not show excessive signs of wear.

Click here

HINT:

If a tire is deformed or an incorrectly sized tire or wheel is installed, this DTC may be stored.

2.	CHECK FREEZE FRAME DATA (WHEEL SPEED)

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

(d) Select a DTC to display the Freeze Frame Data.

(e) Read the freeze frame data of DTC C050C1C.

Chassis > Brake

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front wheel speed sensor RH 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
FL Wheel Speed	Front 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
RR Wheel Speed	Rear wheel speed sensor RH 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 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

Chassis > Brake > DTC(C050C1C) > Freeze Frame Data

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed

Result	Proceed to
The value of RL Wheel Speed is more than all other values.	A
The value of RL Wheel Speed is less than all other values.	B
The value of RL Wheel Speed is less than 5 km/h (3 mph).	C

GO TO STEP 4

GO TO STEP 5

3.	READ VALUE USING GTS (WHEEL SPEED)

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

Chassis > Brake > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front wheel speed sensor RH 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
FL Wheel Speed	Front 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
RR Wheel Speed	Rear wheel speed sensor RH 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 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

Chassis > Brake > Data List

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed

(d) Start the engine.

(e) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.

(f) Check the value of Wheel Speed.

OK:

The difference between the value of RL Wheel Speed and all other values is less than 6%.

HINT:

If the result of the road test is within the specified range, it is possible that this DTC was stored due to a particular situation such as wheelspin.

USE SIMULATION METHOD TO CHECK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

for Double Wishbone Type Suspension: Click here

for Torsion Beam Type Suspension: Click here

4.	READ VALUE USING GTS (WHEEL SPEED)

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

Chassis > Brake > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front wheel speed sensor RH 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
FL Wheel Speed	Front 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
RR Wheel Speed	Rear wheel speed sensor RH 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 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

Chassis > Brake > Data List

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed

(d) Start the engine.

(e) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.

(f) Check the value of Wheel Speed.

OK:

The difference between the value of RL Wheel Speed and all other values is less than 6%.

HINT:

If the result of the road test is within the specified range, it is possible that this DTC was stored due to a particular situation such as brake drag.

USE SIMULATION METHOD TO CHECK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

for Double Wishbone Type Suspension: Click here

for Torsion Beam Type Suspension: Click here

5.	READ VALUE USING GTS (RL WHEEL SPEED)

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

Chassis > Brake > 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

Chassis > Brake > Data List

Tester Display
RL Wheel Speed

(d) Start the engine.

(e) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.

(f) Check the value of RL Wheel Speed.

OK:

The value of RL Wheel Speed is 5 km/h (3 mph) or more.

HINT:

If the result of the road test is within the specified range, it is possible that this DTC was stored due to a particular situation such as wheelspin, brake drag or wheel lockup.

When a DTC is stored during operation of ABS or TRAC, the system also stores vehicle control history (RoB) that can be guessed the vehicle conditions.

Click here

USE SIMULATION METHOD TO CHECK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

for Double Wishbone Type Suspension: Click here

for Torsion Beam Type Suspension: Click here