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Home >> Lexus >> 2019 >> GS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Variable Gear Ratio Steering System - Diagnostic Codes & Symptom Tests >> Variable Gear Ratio Steering System >> DTC C15B1-71: ECU Malfunction(CPU); DTC C15B2-72: ECU Malfunction(Internal Line); DTC C15B3-73: ECU Malfunction(Substrate Temperature Sensor); DTC C15B5-82: ECU Malfunction(Flash Memory); DTC C15B6-83: ECU Malfunction(EEPROM) [09/2014 - ] >> Description
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DTC C15B1-71: ECU Malfunction(CPU); DTC C15B2-72: ECU Malfunction(Internal Line); DTC C15B3-73: ECU Malfunction(Substrate Temperature Sensor); DTC C15B5-82: ECU Malfunction(Flash Memory); DTC C15B6-83: ECU Malfunction(EEPROM) [09/2014 - ]: Description

If the VGRS ECU (front steering control ECU) detects an internal malfunction, it turns the master warning light on, stores these DTCs and stops VGRS operation.

When DTC C15B3/73 is stored, the master warning light is not illuminated and the VGRS system continues to operate.

DTC Code DTC Detection Condition Trouble Area
C15B1/71
C15B2/72
C15B3/73
C15B5/82
C15B6/83		 When the engine switch is turned on (IG), the VGRS ECU (front steering control ECU) detects an internal malfunction. VGRS ECU (front steering control ECU)
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