DTC C0500-14: Left Front Wheel Speed Sensor Circuit Short to Ground or Open [03/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (MOMENTARY INTERRUPTION)
- Select the line graph display on the GTS.
- Check for any momentary interruption in the wire harness and connector.
Chassis > Brake/EPB > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note FL Speed Open Front speed sensor LH open detection Normal / Under intermittent Normal: Normal
Under intermittent: Momentary interruption- FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Normal / Under intermittent Normal: Normal
Under intermittent: Momentary interruption- Chassis > Brake/EPB > Data List
Tester Display FL Speed Open FL Speed Sensor Voltage Open OK
Normal (There are no momentary interruptions.)
NOTE:Perform the above inspection before removing the sensor and connector.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR LH - BRAKE ACTUATOR ASSEMBLY)
- Turn the ignition switch off.
- Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK
The connector is securely connected.
- Disconnect the A107 front speed sensor LH connector.
- Disconnect the A38 No. 2 skid control ECU (brake actuator assembly) connector.
- Check both the connector case and the terminals for deformation and corrosion.
OK
No deformation or corrosion.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A107-5 (FL+) - A38-22 (FL+) Always Below 1 Ω A107-5 (FL+) or A38-22 (FL+) - Body ground Always 10 kΩ or higher A107-6 (FL-) - A38-21 (FL-) Always Below 1 Ω A107-6 (FL-) or A38-21 (FL-) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR POWER SOURCE CIRCUIT)
- Reconnect the A38 No. 2 skid control ECU (brake actuator assembly) connector.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A107-5 (FL+) - Body ground Ignition switch ON 11 to 14 V Result
Proceed to OK NG
Result:
OK
REPLACE FRONT SPEED SENSOR LH. Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]
Result:
NG
REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to REMOVAL [11/2021 - ]