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Home >> Toyota >> 2021 >> Avalon TRD >> Repair and Diagnosis >> Brakes >> Traction Control >> Electronically Controlled Brake System - Diagnostic Codes (C0063-C050C) (Except Hybrid) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC C050C-12: Left Rear Wheel Speed Sensor Circuit Short to Battery [08/2021 -] >> Description

DTC C050C-12: Left Rear Wheel Speed Sensor Circuit Short to Battery [08/2021 -]: Description

Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS control.

The speed sensor detects the magnetic fields of the speed sensor rotor as it rotates and outputs a pulse signal.

The frequency of the pulse varies in accordance with the rotational speed of the speed sensor rotor and the system uses this to determine the wheel speed.

HINT: 

The following example shows a pulse signal that is output when the wire harness connectors are connected to the speed sensors and skid control ECU (brake actuator assembly).

GTY956818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC No. Detection Item DTC Detection Condition Trouble Area
C050C-12 Left Rear Wheel Speed Sensor Circuit Short to Battery A short to +B in the speed sensor signal circuit is detected for 0.12 seconds or more.
  • Rear speed sensor LH (rear axle hub and bearing assembly LH)*1
  • Rear speed sensor LH*2
  • Wire harness or connector
  • Skid control sensor wire LH (No. 2 parking brake wire assembly)
  • Skid control ECU (brake actuator assembly)
  1. *1: for 2WD
  2. *2: for AWD