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Home >> Lexus >> 2010 >> LS 600hL >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Air Suspension (Diagnostic Codes & Circuit Tests) >> Air Suspension System >> DTC C1783: Speed Signal Communication Error >> Description

DTC C1783: Speed Signal Communication Error: Description

The speed sensors monitor the speed of the wheels, and send appropriate speed signals to the suspension control ECU through the skid control ECU. If trouble occurs in either the front speed sensor or rear speed sensor, DTC C1783 is output.

DTC Code Detection Condition Trouble Area
C1783 Speed sensor circuit malfunction for 1 second or more.
  • Speed sensor
  • Skid control ECU
  • Suspension control ECU
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