Lexus ES: Left Rear Wheel Speed Sensor Signal Stuck Low (C050C23)
DESCRIPTION
Refer to DTC C050C12
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C050C23 | Left Rear Wheel Speed Sensor Signal Stuck Low |
|
|
*1: for 2WD
*2: for AWD
DTC Detection Conditions: C050C23| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | The vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph). | ○ | - | - |
| The vehicle speed reaches 18 km/h (11 mph). | - | ○ | - | |
| The vehicle speed and wheel speed are both 43.2 km/h (26.8 mph) or more. | - | - | ○ | |
| Malfunction Status | The wheel speed is 1.8 km/h (1.1 mph) or less. | ○ | - | - |
| The wheel speed has not exceeded 1.8 km/h (1.1 mph). | - | ○ | - | |
| The pulse signal is not detected. | - | - | ○ | |
| Detection Time | 0.6 seconds or more. | - | 0.08 seconds or more. | |
| Number of Trips | 1 trip | 1 trip | 1 trip | |
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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-
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 2 km/h (1 mph) or more to clear the warning lights.
PROCEDURE
| 1. | 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 C050C23.
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 2 km/h (1 mph) or less when all other values are 12 km/h (7 mph) or more. | A |
| The value of RL Wheel Speed is 2 km/h (1 mph) or less when all other values are 43 km/h (27 mph) or more. (for 2WD) | B |
| The value of RL Wheel Speed is 2 km/h (1 mph) or less when all other values are 43 km/h (27 mph) or more. (for AWD) | C |
| B |  | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH |
| C | | GO TO STEP 3 |
|
| 2. | 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 (0.0 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 and perform a road test.
(e) Check that the value of RL Wheel Speed changes in accordance with vehicle speed when accelerating from 0 km/h to 20 km/h (0 mph to 12 mph).
OK:
The value of RL Wheel Speed changes in accordance with vehicle speed.
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, wheelspin or wheel lockup.
| 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 | | GO TO STEP 3 |
| 3. | 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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Components
COMPONENTS ILLUSTRATION *1 FRONT AXLE ASSEMBLY *2 FRONT LOWER BALL JOINT ASSEMBLY *3 COTTER PIN - - Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf) ● Non-reusable part
Adjustment
ADJUSTMENT CAUTION / NOTICE / HINT *a Centering Bolt *b Standard Bolt HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
Centering bolts are used to install the door hinges to the vehicle body and door. The door cannot be adjus
