Lexus ES: Left Rear Wheel Speed Sensor Circuit Voltage Out of Range (C050C1C)
DESCRIPTION
Refer to DTC C050C12
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C050C1C | Left Rear Wheel Speed Sensor Circuit Voltage Out of Range |
|
|
*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.
*3: for 2WD
*4: for AWD
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.
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-
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.
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-
DTC precaution
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Procedure to clear warning lights (When not clearing DTCs) Procedure
- Repair or replacement.
- Turn the engine switch on (IG).
- 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.
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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 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 |
| 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 7 |
|
| 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 |
| 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.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (for 2WD) | B |
| NG (for AWD) | C |
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH |
| C | | REPLACE REAR SPEED SENSOR 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 |
| 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.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (for 2WD) | B |
| NG (for AWD) | C |
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH |
|
| 5. | CHECK REAR SPEED SENSOR LH INSTALLATION |
| (a) 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 | | REINSTALL OR REPLACE REAR SPEED SENSOR LH |
|
| 6. | CHECK REAR SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER) |
(a) Remove the component with the rear speed sensor rotor LH.
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(b) Check the rear speed sensor rotor LH.
OK:
The rear speed sensor rotor LH is free of scratches, oil, and foreign matter.
NOTICE:
- If there is oil or foreign matter on the rear speed sensor rotor LH, clean the rear speed sensor rotor LH.
- Do not use parts cleaner when cleaning the rear speed sensor rotor LH.
- If the rear speed sensor rotor LH is damaged, replace the rear axle hub and bearing assembly LH with a new one.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (The rear speed sensor rotor LH is damaged.) | B |
| NG (There is foreign matter on the rear speed sensor rotor LH.) | C |
| A | | REPLACE REAR SPEED SENSOR LH |
| B | | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH |
| C | | CLEAN REAR SPEED SENSOR ROTOR LH |
| 7. | 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 |
| 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.
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| Result | Proceed to |
|---|---|
| OK | A |
| NG (for 2WD) | B |
| NG (for AWD) | C |
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH |
|
| 8. | CHECK REAR SPEED SENSOR LH INSTALLATION |
| (a) 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) |
|
| OK | | REPLACE REAR SPEED SENSOR LH |
| NG | | REINSTALL OR REPLACE REAR SPEED SENSOR LH |
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