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Home >> Toyota >> 2021 >> 4Runner Trail, 4WD >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (For Vacuum Brake Booster) - Diagnostic Codes (C0040-C137B) >> VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster) >> DTC C050C-23: Left Rear Wheel Speed Sensor Signal Stuck Low; DTC C0512-23: Right Rear Wheel Speed Sensor Signal Stuck Low [08/2019 - ] >> Description

DTC C050C-23: Left Rear Wheel Speed Sensor Signal Stuck Low; DTC C0512-23: Right Rear Wheel Speed Sensor Signal Stuck Low [08/2019 - ]: Description

Refer to DTCs C050C-1F and C0512-1F.

Refer to DESCRIPTION 

DTC No. Detection Item DTC Detection Condition Trouble Area
C050C-23 Left Rear Wheel Speed Sensor Signal Stuck Low Any of the following is detected:
  • When the +BS terminal voltage is 17.4 V or less 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.
  • When the +BS terminal voltage is 17.4 V or less 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.
  • When the +BS terminal voltage is 17.4 V or less at a vehicle speed less than 10 km/h (6 mph), outputs from both speed sensors are 0 km/h (0 mph) for 15 seconds or more. (except both rear speed sensors are 0 km/h (0 mph))
  • Rear speed sensor LH
  • Sensor installation
  • Rear speed sensor rotor LH (Rear axle hub and bearing assembly LH)
C0512-23 Right Rear Wheel Speed Sensor Signal Stuck Low Any of the following is detected:
  • When the +BS terminal voltage is 17.4 V or less 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.
  • When the +BS terminal voltage is 17.4 V or less 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.
  • When the +BS terminal voltage is 17.4 V or less at a vehicle speed less than 10 km/h (6 mph), outputs from both speed sensors are 0 km/h (0 mph) for 15 seconds or more. (except both rear speed sensors are 0 km/h (0 mph))
  • Rear speed sensor RH
  • Sensor installation
  • Rear speed sensor rotor RH (Rear axle hub and bearing assembly RH)
C050C-23 DTC DETECTION CONDITIONS

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition When the +BS terminal voltage is 17.4 V or less ◦ ◦ ◦
Malfunction Status 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 ◦ - -
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) - ◦ -
At a vehicle speed of 10 km/h (6 mph) or more, outputs from both front speed sensors are 0 km/h (0 mph) (except both rear speed sensors are 0 km/h (0 mph)) - - ◦
Detection Time 15 seconds or more. 1 second or more. 15 seconds or more.
Number of Trips 1 trip 1 trip 1 trip

HINT: 

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

C0512-23 DTC DETECTION CONDITIONS

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition When the +BS terminal voltage is 17.4 V or less ◦ ◦ ◦
Malfunction Status 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 ◦ - -
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) - ◦ -
At a vehicle speed of 10 km/h (6 mph) or more, outputs from both front speed sensors are 0 km/h (0 mph) (except both rear speed sensors are 0 km/h (0 mph)) - - ◦
Detection Time 15 seconds or more. 1 second or more. 15 seconds or more.
Number of Trips 1 trip 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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