Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Assist Map Number Mismatch (C1582)

DESCRIPTION

When an incorrect hybrid vehicle control ECU, main body ECU (multiplex network body ECU) or skid control ECU (brake booster with master cylinder 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

  • CAN communication system
  • Incorrect hybrid vehicle control ECU
  • Incorrect main body ECU (multiplex network body ECU)
  • Incorrect skid control ECU (brake booster with master cylinder assembly)
  • Rack and pinion power steering gear assembly

EPS warning light: Does not come on

Assist Map Writing is performed or the power switch is turned on (IG) again

-

CAUTION / NOTICE / HINT

NOTICE:

If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

Click here

HINT:

Related parts store information necessary for assist map writing.

Related Part:

  • Hybrid vehicle control ECU
  • Main body ECU (Multiplex network body ECU)
  • Skid control ECU (Brake booster with master cylinder assembly)

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs.

Click here

Result

Proceed to

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK RELATED PART

(a) Check if the part below has 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 the 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

(b) When DTC C1582 is output and parts have not been exchanged, replace the power steering ECU (rack and pinion power steering gear assembly) as it may have an internal malfunction.

NOTICE:

If the rack and pinion power steering gear assembly has been replaced, perform assist map writing.

Click here

Result

Proceed to

The related part has an incorrect part number.

A

The related part has the correct part number, or a related part and rack and pinion power steering gear assembly have not been replaced.

B

B

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

A

3.

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

(a) Replace the related part with one that has the correct part number.

  • 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

NEXT

4.

CHECK FOR DTC

(a) Check for DTCs.

Chassis > EMPS > Trouble Codes

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

A

END

B

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

    Assist Map Number Un-Writing (C1581)

    Calibration

    See More:

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Diagnostic Trouble Code Chart
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    Toyota Avalon (XX50) 2019-2022 Owners Manual

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