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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Electronically Controlled Brake System (Diagnostic Codes) (2 Of 4) (Hybrid)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1401: Malfunction in Front Speed Sensor RH Circuit; DTC C1402: Malfunction in Front Speed Sensor LH Circuit [07/2022 - ] >> Component Operating Range

Component Operating Range

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C0501 AND C0507 (CASE 1)

All of the following conditions are met -
Control valve solenoid Non-drive
Brake system voltage 1 (VM1) Less than 16.44 V
Difference between the highest speed sensor output value and the second lowest speed sensor output value Less than 20% of the highest speed sensor output value
The second lowest speed sensor output value 10 km/h (6 mph) or more
Speed sensor fail (C0502, C0503, C0504, C0508, C0509, C050A, C050E, C050F, C0510, C0514, C0515, C0516, C14E1, C14E4, C14E7, C14EA) Not detected
Speed sensor pass flag On
C0501 AND C0507 (CASE 2)

All of the following conditions are met -
Control valve solenoid Non-drive
Brake system voltage 1 (VM1) Less than 16.44 V
Stop light switch assembly Off
Parking brake Off
Difference between the highest speed sensor output value and the second lowest speed sensor output value Less than 2 km/h (1 mph)
The second lowest speed sensor output value 10 km/h (6 mph) or more
Speed sensor fail (C0502, C0503, C0504, C0508, C0509, C050A, C050E, C050F, C0510, C0514, C0515, C0516, C14E1, C14E4, C14E7, C14EA) Not detected
Speed sensor pass flag On
C140B AND C140C

All of the following conditions are met -
Control valve solenoid Non-drive
Brake system voltage 1 (VM1) Less than 16.44 V
Stop light switch assembly Off
Parking brake Off
Difference in output of the speed sensor with the highest value and the output of the speed sensor with the second highest value. Less than 20% of the highest speed sensor output value
The second highest speed sensor output value 10 km/h (6 mph) or more
Speed sensor fail (C0502, C0503, C0504, C0508, C0509, C050A, C050E, C050F, C0510, C0514, C0515, C0516, C14E1, C14E4, C14E7, C14EA) Not detected
Stop light switch assembly fail (P0572) Not detected
Speed sensor pass flag On
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