DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC C1582: Assist Map Number Mismatch [12/2019 - 11/2023] >> Description

DTC C1582: Assist Map Number Mismatch [12/2019 - 11/2023]: Description

for Gasoline Model: 

  1. When an incorrect ECM, main body ECU (multiplex network body ECU) or skid control ECU (Brake actuator assembly) is installed after the assist map has been written to the power steering ECU (rack and pinion power steering gear assembly), DTC C1582 is stored because the information stored in the power steering ECU (rack and pinion power steering gear assembly) does not match the vehicle specifications.

for HV Model: 

  1. When an incorrect hybrid vehicle control ECU, main body ECU (multiplex network body ECU) or No. 2 skid control ECU (brake actuator assembly) is installed after the assist map has been written to the power steering ECU (rack and pinion power steering gear assembly), DTC C1582 is stored because the information stored in the power steering ECU (rack and pinion power steering gear assembly) does not match the vehicle specifications.
DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1582 Assist Map Number Mismatch Assist map number mismatch for Gasoline Model: 
  • CAN communication system
  • Incorrect ECM
  • Incorrect main body ECU (multiplex network body ECU)
  • Incorrect skid control ECU (brake actuator assembly)
  • Rack and pinion power steering gear assembly

for HV Model: 

  • CAN communication system
  • Incorrect hybrid vehicle control ECU
  • Incorrect main body ECU (multiplex network body ECU)
  • Incorrect No. 2 skid control ECU (brake actuator assembly)
  • Rack and pinion power steering gear assembly
EPS warning light: Does not come on Ignition switch is turned to ON again -