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Home >> Lexus >> 2017 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC C1582: Assist Map Number Mismatch [10/2015 - 11/2017] >> Description

DTC C1582: Assist Map Number Mismatch [10/2015 - 11/2017]: Description

When an incorrect ECM, DRS ECU (rear steering control ECU) (w/ Dynamic Rear Steering System), AVS ECU (absorber control ECU) (w/ Adaptive Variable Suspension System) or VGRS ECU (front steering control ECU) (w/ Variable Gear Ratio Steering System) is installed after the assist map has been written to the power steering ECU assembly, then DTC C1582 is stored because the data does not match the vehicle specifications.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1582 Assist Map Number Mismatch Assist map number mismatch
  • CAN communication system
  • Incorrect ECM
  • Incorrect DRS ECU (rear steering control ECU) (w/ Dynamic Rear Steering System)
  • Incorrect AVS ECU (absorber control ECU) (w/ Adaptive Variable Suspension System)
  • Incorrect VGRS ECU (front steering control ECU) (w/ Variable Gear Ratio Steering System)
  • Power steering ECU assembly
EPS warning light: Does not come on -