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Home >> Toyota >> 2022 >> 4Runner TRD Pro >> 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 C1337: Diameter of the Tire is not Uniform [08/2015 - 08/2019] >> Description

DTC C1337: Diameter of the Tire is not Uniform [08/2015 - 08/2019]: Description

The skid control ECU measures the speed of each wheel by receiving signals from the speed sensors.

These signals are used for recognizing that all 4 wheels are operating properly. Therefore, all wheel signals must indicate the same speed.

DTC No. DTC Detection Condition Trouble Area
C1337 The following occurs in 3 consecutive trips:
At a vehicle speed of 20 km/h (12 mph) or more, there is a difference of 20% or more in the average speed between the front wheels and rear wheels for 20 seconds or more.
  • Tire and wheel size
  • Tire deformation
  • Speed sensor rotor
  • Speed sensor
  • Speed sensor circuit
  • Skid control ECU (Brake actuator assembly)