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Home >> Lexus >> 2022 >> UX 250h Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Diagnostic Codes) (2 Of 4) (Hybrid) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1403: Malfunction in Rear Speed Sensor RH Circuit; DTC C1404: Malfunction in Rear Speed Sensor LH Circuit [10/2018 - ] >> Description

DTC C1403: Malfunction in Rear Speed Sensor RH Circuit; DTC C1404: Malfunction in Rear Speed Sensor LH Circuit [10/2018 - ]: Description

Refer to DTCs C1415 and C1416.

Refer to DTC C1415: Rear Speed Sensor RH Circuit Output; DTC C1416: Rear Speed Sensor LH Circuit Output [10/2018 - 08/2021] , or refer to DTC C1415: Rear Speed Sensor RH Circuit Output; DTC C1416: Rear Speed Sensor LH Circuit Output [08/2021 - ]

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note
C1403 Malfunction in Rear Speed Sensor RH Circuit 521
522
527
  • INF Code: 521
    • At a vehicle speed of 10 km/h (6 mph) or more, output voltage from one of the speed sensors is less than that from the other sensors for 30 seconds or more.*1
    • At a vehicle speed of 10 km/h (6 mph) or more, output voltage from one of the speed sensors is less than that from the other sensors for 15 seconds or more.*2
  • INF Code: 522
    • At a vehicle speed of 10 km/h (6 mph) or more, outputs from both speed sensors are 0 km/h (0 mph) for 30 seconds or more. (except when both rear speed sensors are 0 km/h (0 mph)).*1
    • At a vehicle speed of 10 km/h (6 mph) or more, outputs from both speed sensors are 0 km/h (0 mph) for 15 seconds or more. (except when both rear speed sensors are 0 km/h (0 mph)).*2
  • INF Code: 527
    • At a vehicle speed of 10 km/h (6 mph) or more, output from one of the speed sensors is 0 km/h (0 mph) for 1 second or more.
  • Skid control sensor wire RH (No. 1 parking brake wire assembly)
  • Rear speed sensor RH*1
  • Rear speed sensor RH (rear axle hub and bearing assembly RH)*2
  • Speed sensor installed improperly
  • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
  • Wire harness or connector
 Comes on
  • INF Code 521: SAE Code C0513 (Case 1)
  • INF Code 522: SAE Code C140E
  • INF Code 527: SAE Code C0513 (Case 2)
  • ABS DTC
C1404 Malfunction in Rear Speed Sensor LH Circuit 531
532
537
  • INF Code: 531
    • At a vehicle speed of 10 km/h (6 mph) or more, output voltage from one of the speed sensors is less than that from the other sensors for 30 seconds or more.*1
    • At a vehicle speed of 10 km/h (6 mph) or more, output voltage from one of the speed sensors is less than that from the other sensors for 15 seconds or more.*2
  • INF Code: 532
    • At a vehicle speed of 10 km/h (6 mph) or more, outputs from both speed sensors are 0 km/h (0 mph) for 30 seconds or more. (except when both rear speed sensors are 0 km/h (0 mph)).*1
    • At a vehicle speed of 10 km/h (6 mph) or more, outputs from both speed sensors are 0 km/h (0 mph) for 15 seconds or more. (except when both rear speed sensors are 0 km/h (0 mph)).*2
  • INF Code: 537
    • At a vehicle speed of 10 km/h (6 mph) or more, output from one of the speed sensors is 0 km/h (0 mph) for 1 second or more.
  • Skid control sensor wire LH (No. 2 parking brake wire assembly)
  • Rear speed sensor LH*1
  • Rear speed sensor LH (rear axle hub and bearing assembly LH)*2
  • Speed sensor installed improperly
  • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
  • Wire harness or connector
 Comes on
  • INF Code 531: SAE Code C050D (Case 1)
  • INF Code 532: SAE Code C140D
  • INF Code 537: SAE Code C050D (Case 2)
  • ABS DTC
  1. *1: for AWD
  2. *2: for 2WD
DTC DETECTION CONDITIONS: C1403 INF CODE: 521

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition 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. (for AWD) ◦ -
Output voltage from one of the speed sensors is less than that from the other sensors. (for 2WD) - ◦
Detection Time 30 seconds or more 15 seconds or more
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: C1403 INF CODE: 522

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition At a vehicle speed of 10 km/h (6 mph) or more ◦ ◦
Malfunction Status Outputs from both speed sensors are 0 km/h (0 mph). (except when both rear speed sensors are 0 km/h (0 mph)). (for AWD) ◦ -
Outputs from both speed sensors are 0 km/h (0 mph). (except when both rear speed sensors are 0 km/h (0 mph)). (for 2WD) - ◦
Detection Time 30 seconds or more 15 seconds or more
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: C1404 INF CODE: 531

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition 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. (for AWD) ◦ -
Output voltage from one of the speed sensors is less than that from the other sensors. (for 2WD) - ◦
Detection Time 30 seconds or more 15 seconds or more
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: C1404 INF CODE: 532

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition At a vehicle speed of 10 km/h (6 mph) or more ◦ ◦
Malfunction Status Outputs from both speed sensors are 0 km/h (0 mph). (except when both rear speed sensors are 0 km/h (0 mph)). (for AWD) ◦ -
Outputs from both speed sensors are 0 km/h (0 mph). (except when both rear speed sensors are 0 km/h (0 mph)). (for 2WD) - ◦
Detection Time 30 seconds or more 15 seconds or more
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

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