Toyota Corolla Cross: Left Front Wheel Speed Sensor Signal Stuck Low (C050023)
DESCRIPTION
Refer to DTC C050012
Click here .gif)
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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
|
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 |
|
Result |
Proceed to |
|---|---|
|
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 |
|
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 |
|
|
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 |
READ NEXT:
Left Front Wheel Speed Sensor Signal Stuck High (C050024)
DESCRIPTION
Refer to DTC C050012
Click here
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
MIL
DTC Output from
Left Front Wheel Speed Sensor Internal Electronic Failure (C050049)
DESCRIPTION
When the system is starting up and the skid control ECU (brake
actuator assembly) detects a speed sensor circuit malfunction via the speed sensor
circuit self-diagnosis function, this
Right Front Wheel Speed Sensor Circuit Short to Battery (C050612)
DESCRIPTION
Each speed sensor detects wheel speed and sends signals to the
skid control ECU (brake actuator assembly). These signals are used by the brake
control.
The speed sensor detects the m
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without a smart key system)
Starting the engine
1. Check that the parking brake
is set.
2. Check that the shift lever is in
P.
Do not press the shift lever button
after shifting the shit position to P.
3. Firmly depress the brake
pedal.
4. Turn the engine switch to
START to start the engine.
■If the engine does not start
Insufficient Coolant Temperature for Closed Loop Fuel Control (P012500)
DESCRIPTION Refer to DTC P011511. Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL Note
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The engine coolant temperature does not reach the closed loop enabling tem
