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DTC C1582: Assist Map Number Mismatch [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check for DTCs. Refer to DIAGNOSIS SYSTEM [08/2013 - ] .
      RESULT

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B → See step   4 

    A: Go to next step 

  2. CHECK RELATED PART (POWER MANAGEMENT CONTROL ECU, MAIN BODY ECU AND SKID CONTROL ECU) 
    1. Check if any of the parts listed below have been replaced with an incorrect part in the past.
      Related Part Power management control ECU
      Main body ECU (Multiplex network body ECU)
      Skid control ECU (Brake booster with master cylinder assembly)
      NOTE:

      When removing a related part to check it, be sure to follow the appropriate procedures and precautions.

      • Refer to the following procedures to remove the power management control ECU. Refer to REMOVAL [08/2013 - ] .
      • Refer to the following procedures to remove the main body ECU (multiplex network body ECU). Refer to REMOVAL [08/2013 - ] .
      • Refer to the following procedures to remove the skid control ECU (brake booster with master cylinder assembly). Refer to REMOVAL [08/2013 - ] - Step 17 .

      HINT: 

      • DTC C1582 is stored when a part with an incorrect part number is installed for the related parts listed above.
      • When DTC C1582 is output when parts have not been exchanged, replace the power steering ECU assembly as it may have an internal malfunction.
      RESULT

      Result  Proceed to 
      All installed related parts have correct part number A
      Part with incorrect part number is installed B

    B → REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER 

    A → See step   3 

  3. REPLACE POWER STEERING ECU ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 
  4. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]