Lexus ES manuals

Lexus ES: Left Rear Wheel Speed Sensor Circuit Voltage Out of Range (C050C1C)

DESCRIPTION

Refer to DTC C050C12

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

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 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).
  • 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 more*2 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

*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.

DTC Detection Conditions: C050C1C
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Pattern 5

Pattern 6

Diagnosis Condition

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.

-

-

-

The vehicle speed is less than 100 km/h (62 mph).

-

-

-

Malfunction Status

When the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 and 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.

-

-

-

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 and the value of the wheel speed is continuously the slowest.

-

-

-

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 and the wheel speed is less than 5 km/h (3 mph).

-

-

-

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6 km/h (4 mph) or more*2 and 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.

-

-

-

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6 km/h (4 mph) or more*2 and the value of the wheel speed is continuously the slowest.

-

-

-

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6 km/h (4 mph) or more*2 and the wheel speed is less than 5 km/h (3 mph).

-

-

-

-

-

Detection Time

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Number of Trips

1 trip

1 trip

1 trip

1 trip

1 trip

1 trip

*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.

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C050C1C
 

Vehicle Condition

Pattern 7

Pattern 8

Pattern 9

Diagnosis Condition

The vehicle speed is 100 km/h (62 mph) or more.

Malfunction Status

When the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 and 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.

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 and the value of the wheel speed is continuously the slowest.

-

-

When the difference between the highest wheel speed and the lowest wheel speed is 6% or more*1 and the wheel speed is less than 5 km/h (3 mph).

-

-

Detection Time

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Between 9 and 72 seconds or more (period changes depending on vehicle conditions).

Number of Trips

1 trip

1 trip

1 trip

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

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

NOTICE:

  • 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

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

    Click here

  • DTC precaution

    Click here

    Procedure to clear warning lights (When not clearing DTCs)

    Procedure

    1. Repair or replacement.
    2. Turn the engine switch on (IG).
    3. Drive the vehicle at 11 km/h (7 mph) or more for 1 second or more to clear the warning lights.

PROCEDURE

1.

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.

NEXT

2.

CHECK FREEZE FRAME DATA (WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

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

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

Chassis > Brake/EPB

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/EPB > 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

B

GO TO STEP 4

C

GO TO STEP 5

A

3.

READ VALUE USING TECHSTREAM (WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Enter the following menus: Chassis / Brake/EPB / Data List.

Chassis > Brake/EPB > 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/EPB > 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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

4.

READ VALUE USING TECHSTREAM (WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Enter the following menus: Chassis / Brake/EPB / Data List.

Chassis > Brake/EPB > 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/EPB > 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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

5.

READ VALUE USING TECHSTREAM (RL WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Enter the following menus: Chassis / Brake/EPB / Data List.

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

Chassis > Brake/EPB > 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 that can be guessed the vehicle conditions.

Click here

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

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