Lexus NX: Assist Map Number Mismatch (C1582)

DESCRIPTION

When an incorrect hybrid vehicle control ECU, an incorrect Skid control ECU or an incorrect main body ECU is installed after the assist map has been written in 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

Return-to-normal Condition

C1582

Assist Map Number Mismatch

Assist map number mismatch

  • CAN communication system
  • Incorrect hybrid vehicle control ECU
  • Incorrect skid control ECU (brake booster with master cylinder assembly)
  • Incorrect main body ECU (multiplex network body ECU)
  • Power steering ECU assembly

Off

Assist map written

CAUTION / NOTICE / HINT

NOTICE:

  • If the power steering ECU assembly has been replaced, perform assist map writing.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.

    Click here

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs.

Click here

CAN communication system DTC is output.

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

CAN communication system DTC is not output.

2.

CHECK RELATED PART

(a) Check if any of the parts listed below have been replaced with an incorrect part in the past.

Related Part

Hybrid vehicle control ECU

Main body ECU (multiplex network body ECU)

Skid control ECU (brake booster with master cylinder assembly)

NOTICE:

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

  • Hybrid vehicle control ECU

    Click here

  • Main body ECU (multiplex network body ECU)

    Click here

  • Skid control ECU (brake booster with master cylinder assembly)

    Click here

HINT:

When DTC C1582 is output when parts have not been exchanged, replace the power steering ECU assembly as it may have an internal malfunction.

All installed related parts have correct part number

REPLACE POWER STEERING ECU ASSEMBLY

Part with incorrect part number is installed

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

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