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Home >> Lexus >> 2018 >> GS 450h Base >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Adaptive Variable Suspension System (Diagnostic Codes (C1715 - U0126)) >> Adaptive Variable Suspension System >> DTC C1783: Speed Signal Communication Error [09/2014 - ] >> Description

DTC C1783: Speed Signal Communication Error [09/2014 - ]: Description

The speed sensors monitor the speed of the wheels and send an appropriate speed signal to the absorber control ECU through the skid control ECU assembly. If trouble occurs in either a front speed sensor or rear speed sensor, DTC C1783 is stored.

DTC Code Detection Condition Trouble Area
C1783 A speed sensor malfunction signal from the skid control ECU assembly is detected for 1 second or more.
  • CAN communication system
  • Brake control system (speed sensor circuit)
  • Absorber control ECU
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