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Home >> Lexus >> 2016 >> LX 570 >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Variable Gear Ratio Steering System - Diagnostic Codes & Symptom Tests >> Variable Gear Ratio Steering System >> DTC C1595-55: Lost Communication with Steering Angle Sensor Module; DTC C15C4-68: Steering Angle Signal (Test Mode DTC) [09/2015 - 08/2020] >> Description
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DTC C1595-55: Lost Communication with Steering Angle Sensor Module; DTC C15C4-68: Steering Angle Signal (Test Mode DTC) [09/2015 - 08/2020]: Description

Signal transmission between the VGRS ECU (steering control ECU) and steering sensor is performed via serial communication.

If a serial communication error occurs between the VGRS ECU (steering control ECU) and steering sensor, the ECU stores DTC C1595/55.

The test mode DTC C15C4/68 is only stored during test mode.

DTC No. DTC Detection Condition Trouble Area
C1595/55 With the engine switch on (IG) and a power source voltage of 10 V or more, serial communication from the steering sensor is interrupted for 3 seconds or more.
  • Steering sensor
  • VGRS ECU (steering control ECU)
  • Harness or connector
C15C4/68 The system enters test mode.
  • Steering sensor
  • VGRS ECU (steering control ECU)
  • Harness or connector