Lexus ES manuals

Lexus ES: Assist Map Number Mismatch (C1582)

DESCRIPTION

When an incorrect ECM, skid control ECU (brake actuator assembly) or AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System) 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 ECM
  • Incorrect skid control ECU (brake actuator assembly)
  • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)
  • Rack and pinion power steering gear assembly

EPS warning light: Does not come on

Engine switch 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:

  • ECM
  • Skid control ECU (Brake actuator assembly)
  • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

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

ECM

Skid control ECU (Brake actuator assembly)

AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

NOTICE:

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

  • ECM

    Click here

  • Skid control ECU (Brake actuator assembly)

    Click here

  • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

    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.

  • ECM

    Click here

  • Skid control ECU (Brake actuator assembly)

    Click here

  • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

    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

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