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Home >> Lexus >> 2016 >> IS 300 Base >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Variable Gear Ratio Steering System - Diagnostics - Introduction >> Variable Gear Ratio Steering System >> Problem Symptoms Table [04/2013 - 10/2016] >> Problem Symptoms Table [04/2013 - 10/2016]

Problem Symptoms Table [04/2013 - 10/2016]

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VGRS SYSTEM

Symptom Suspected Area Link
Steering wheel is off-center Steering wheel is off-center or deviates from neutral position Refer to Steering Wheel is Off-center or Deviates from Neutral Position [04/2013 - 10/2016]
VGRS system stops or does not operate Actuator temperature is abnormal Refer to VGRS System Stops or does not Operate [04/2013 - 10/2016]
IG power source circuit Refer to DTC C15C6/77: IG Power Supply Voltage [04/2013 - 10/2016]
PIG power supply circuit Refer to DTC C15C7/78: DC Motor Power Source Voltage; DTC C15C8/79: Power Supply Relay Failure [04/2013 - 10/2016]
Steering system (Hard steering) Refer to PROBLEM SYMPTOMS TABLE [04/2013 - 08/2015] , or refer to PROBLEM SYMPTOMS TABLE [08/2015 - 10/2017]
If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the VGRS ECU (Front steering control ECU). Refer to REMOVAL [04/2013 - 10/2016]
Steering angle differs between left and right Steering angle differs between left and right Refer to Steering Angle Differs between Left and Right [04/2013 - 10/2016]
VGRS system suspends right after engine start VGRS system suspends right after engine start Refer to VGRS System Suspends right after Engine Start [04/2013 - 10/2016]
Steering wheel vibrates or abnormal noise is heard from steering wheel Steering actuator assembly -
Power steering link assembly (Power steering motor) -
Steering column assembly -
Master warning light malfunction Combination meter assembly Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]
VGRS ECU (Front steering control ECU) Refer to TERMINALS OF ECU [04/2013 - 10/2016] 
CAN communication system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 10/2016]