BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model) C050023 Left Front Wheel Speed Sensor Signal Stuck Low
DESCRIPTION
Refer to DTC C050012.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Note |
|---|---|---|---|---|---|---|
| C050023 | Left Front Wheel Speed Sensor Signal Stuck Low | ·
When the vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph), the wheel speed is 1.8 km/h (1.1 mph) or less for 0.6 seconds or more. ·
When the wheel speed has not exceeded 1.8 km/h (1.1 mph), the vehicle speed reaches 18 km/h (11 mph). ·
When the vehicle speed and wheel speed are both 50.4 km/h (31.3 mph) or more, the pulse signal is not detected for 0.08 seconds or more. |
·
Front speed sensor LH ·
Speed sensor installation |
Comes on | Brake/EPB | ·
SAE Code: C0501 (Case 4 to 6) ·
Output ECU: Skid control ECU (brake actuator assembly) |
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
Procedure to clear warning lights (When not clearing DTCs) Procedure 1.Repair or replacement.
2.Turn the ignition switch to ON.
3.Drive the vehicle at 2 km/h (1 mph) or more to clear the warning lights.
PROCEDURE
Select a DTC to display the Freeze Frame Data.
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
- Chassis > Brake/EPB > DTC(C050023) > Freeze Frame Data
-
Tester Display FR Wheel Speed FL Wheel Speed RR Wheel Speed RL Wheel Speed - 50040 435 13,14,15,16 C050023
- Result:
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
A
B
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
- Chassis > Brake/EPB > Data List
-
Tester Display FL Wheel Speed - 50003 435 14
Turn the ignition switch to ON (READY) and perform a road test.
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.
- Result:
Proceed to OK NG
OK
NG
| *1 | Front Speed Sensor LH |
| *a | Correct |
| *b | Incorrect |
| *c | 8.5 N*m (87 kgf*cm, 75 in.*lbf) |
| *d | No clearance |
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)
- Result:
Proceed to OK NG
OK
NG