DESCRIPTION
Refer to DTC C05001F.
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DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
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C050023 | Left Front Wheel Speed Sensor Signal Stuck Low | Any of the following is detected:
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Vehicle Condition | ||||||
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Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | ||
Diagnosis Condition | When the +BS terminal voltage is 17.4 V or less at a vehicle speed of 10 km/h (6 mph) or more | ○ | ○ | ○ | ○ | ○ |
Malfunction Status | Output voltage from one of the speed sensors is less than that from the other sensors*2 | ○ | - | - | - | - |
Output voltage from one of the speed sensors is less than that from the other sensors*1 | - | ○ | - | - | - | |
Output from one of the speed sensors is 0 km/h (0 mph) | - | - | ○ | - | - | |
Outputs from both front speed sensors are 0 km/h (0 mph)*2 | - | - | - | ○ | - | |
Outputs from both front speed sensors are 0 km/h (0 mph)*1 | - | - | - | - | ○ | |
Detection Time | 15 seconds or more | 30 seconds or more | 1 second or more | 15 seconds or more | 30 seconds or more | |
Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip |
HINT:
DTC will be output when conditions for any of the patterns in the table above are met.
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. | CHECK FRONT SPEED SENSOR LH INSTALLATION |
(a) Turn the engine switch off. |
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(b) Check the front speed sensor LH installation.
OK:
There is no clearance between the front speed sensor LH and front axle carrier sub-assembly.
The installation bolt is tightened properly.
Torque
8.5 N*m (87 kgf*cm, 75 in.*lbf)
NG | REINSTALL OR REPLACE FRONT SPEED SENSOR LH |
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2. | CHECK FRONT SPEED SENSOR LH (CHECK FOR FOREIGN MATTER) |
(a) Remove the front speed sensor LH.
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(b) Check the front speed sensor LH tip.
OK:
The front speed sensor LH tip is free of scratches, oil, and foreign matter.
NOTICE:
NG | CLEAN OR REPLACE FRONT SPEED SENSOR LH |
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3. | READ VALUE USING TECHSTREAM (FL 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 |
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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 |
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FL Wheel Speed |
(d) Start the engine.
(e) Perform a road test.
(f) Check the speed value output from the speed sensor displayed on the Techstream.
HINT:
Factors that affect the indicated vehicle speed include tire size, tire pressure, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart.
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OK:
The speed value output from the speed sensor displayed on the Techstream is similar to the speed indicated on the speedometer.
OK | USE SIMULATION METHOD TO CHECK |
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4. | CHECK VEHICLE SPECIFICATION |
(a) Check the vehicle specification.
Result | Proceed to |
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w/o AVS | A |
w/ AVS | B |
B | GO TO STEP 7 |
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5. | CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR LH - BRAKE ACTUATOR ASSEMBLY) |
(a) Turn the engine switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the A92 front speed sensor LH connector.
(d) Disconnect the A41 skid control ECU (brake actuator assembly) connector.
(e) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A92-3 (FL+) - A41-22 (FL+) | Always | Below 1 Ω |
A92-3 (FL+) or A41-22 (FL+) - Body ground | Always | 10 kΩ or higher |
A92-4 (FL-) - A41-21 (FL-) | Always | Below 1 Ω |
A92-4 (FL-) or A41-21 (FL-) - Body ground | Always | 10 kΩ or higher |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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6. | CHECK FRONT SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER) |
(a) Remove the component with the front speed sensor rotor LH.
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(b) Check the front speed sensor rotor LH.
OK:
The front speed sensor rotor LH is free of scratches, oil, and foreign matter.
NOTICE:
HINT:
Result | Proceed to |
---|---|
OK | A |
NG (The front speed sensor rotor LH is damaged.) | B |
NG (There is foreign matter on the front speed sensor rotor LH.) | C |
A | REPLACE FRONT SPEED SENSOR LH |
B | REPLACE FRONT AXLE HUB SUB-ASSEMBLY LH |
C | CLEAN FRONT SPEED SENSOR ROTOR LH |
7. | INSPECT FRONT SKID CONTROL SENSOR WIRE LH |
(a) Turn the engine switch off. |
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(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the z14 and A90 front skid control sensor wire LH connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
z14-1 (FL+) - A90-3 (FL+) | Always | Below 1 Ω |
z14-1 (FL+) or A90-3 (FL+) - Body ground and other terminals | Always | 10 kΩ or higher |
z14-2 (FL-) - A90-4 (FL-) | Always | Below 1 Ω |
z14-2 (FL-) or A90-4 (FL-) - Body ground and other terminals | Always | 10 kΩ or higher |
NG | REPLACE FRONT SKID CONTROL SENSOR WIRE LH |
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8. | CHECK HARNESS AND CONNECTOR (FRONT SKID CONTROL SENSOR WIRE LH - BRAKE ACTUATOR ASSEMBLY) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the A41 skid control ECU (brake actuator assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A90-3 (FL+) - A41-22 (FL+) | Always | Below 1 Ω |
A90-3 (FL+) or A41-22 (FL+) - Body ground | Always | 10 kΩ or higher |
A90-4 (FL-) - A41-21 (FL-) | Always | Below 1 Ω |
A90-4 (FL-) or A41-21 (FL-) - Body ground | Always | 10 kΩ or higher |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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9. | CHECK FRONT SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER) |
(a) Remove the component with the front speed sensor rotor LH.
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(b) Check the front speed sensor rotor LH.
OK:
The front speed sensor rotor LH is free of scratches, oil, and foreign matter.
NOTICE:
HINT:
Result | Proceed to |
---|---|
OK | A |
NG (The front speed sensor rotor LH is damaged.) | B |
NG (There is foreign matter on the front speed sensor rotor LH.) | C |
A | REPLACE FRONT SPEED SENSOR LH |
B | REPLACE FRONT AXLE HUB SUB-ASSEMBLY LH |
C | CLEAN FRONT SPEED SENSOR ROTOR LH |
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