Toyota Corolla Cross: Left Front Wheel Speed Sensor Signal Stuck Low (C050023)
DESCRIPTION
Refer to DTC C050012
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DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Note |
|---|---|---|---|---|---|---|
|
C050023 |
Left Front Wheel Speed Sensor Signal Stuck Low |
|
|
Comes on |
Brake/EPB |
|
MONITOR DESCRIPTION
C0501 (Case 4):- After starting off from a stop, if the value of the front left speed sensor when the vehicle has reached a certain speed is a certain value or less, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- If the value of the front left speed sensor when the vehicle has reached a certain speed is a certain value or less, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- When the vehicle is being driven at a certain speed or more and the acceleration rate of the respective wheel is less than a certain value, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
C0501 (Case 4): Wheel speed sensor drive off monitoring (FL) (logic 1) C0501 (Case 5): Wheel speed sensor drive off monitoring (FL) (logic 2) C0501 (Case 6): Wheel speed sensor dynamic monitoring (FL) |
|
Required Sensors/Components(Main) |
Speed sensor |
|
Required Sensors/Components(Related) |
Skid control ECU (brake actuator assembly) Speed sensor |
|
Frequency of Operation |
Continuous |
|
Duration |
-: C0501 (Case 5) 0.08 seconds: C0501 (Case 6) 0.6 seconds: C0501 (Case 4) |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
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Monitor runs whenever the following DTCs are not stored |
TMC's intellectual property |
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Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
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TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
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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 (READY) 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
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Procedure |
|---|
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PROCEDURE
|
1. |
CHECK FREEZE FRAME DATA (WHEEL SPEED) |
(a) Select a DTC to display the Freeze Frame Data.
(b) Read the freeze frame data of DTC C050023.
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 |
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Result |
Proceed to |
|---|---|
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The value of FL Wheel Speed is 2 km/h (1 mph) or less when all other values are 12 km/h (7 mph) or more. |
A |
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The value of FL Wheel Speed is 2 km/h (1 mph) or less when all other values are 50 km/h (31 mph) or more. |
B |
| B | .gif)
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GO TO STEP 3 |
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2. |
READ VALUE USING GTS (FL WHEEL SPEED) |
(a) Check the Data List using the GTS.
Chassis > Brake/EPB > Data List|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
FL Wheel Speed |
Front 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 |
|---|
|
FL Wheel Speed |
(b) Turn the ignition switch to ON (READY) and perform a road test.
(c) Check that the value of FL 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 FL 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.
| OK |
|
USE SIMULATION METHOD TO CHECK |
|
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3. |
CHECK FRONT SPEED SENSOR LH INSTALLATION |
|
(a) Check the front speed sensor LH installation. OK: There is no clearance between the front speed sensor LH and the steering knuckle LH. The installation bolt is tightened properly. Torque 8.5 N*m (87 kgf*cm, 75 in.*lbf) |
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| OK |
|
REPLACE FRONT SPEED SENSOR LH |
| NG |
|
REINSTALL OR REPLACE FRONT SPEED SENSOR LH |
