POWER ASSIST SYSTEMS POWER STEERING SYSTEM C1582 Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM or skid control ECU (brake actuator assembly) (w/ ABS) is installed after the assist map has been written to 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	Note
C1582	Assist Map Number Mismatch	Assist map number mismatch	· CAN communication system · Incorrect ECM · Incorrect skid control ECU (brake actuator assembly) (w/ ABS) · Power steering ECU assembly	EPS warning light: Does not come on	Ignition switch ON again	-

CAUTION / NOTICE / HINT

NOTICE:: If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.; Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION

HINT:: Related parts store information necessary for assist map writing.; Related Part:; ·

ECM

·

Skid control ECU (Brake actuator assembly) (w/ ABS)

PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

Check for DTCs.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM

Result:

Result	Proceed to
CAN communication system DTCs are not output.	A
CAN communication system DTCs are output.	B

2.CHECK RELATED PART

GO TO CAN COMMUNICATION SYSTEM

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING

2.CHECK RELATED PART

Check if the parts below has been replaced with an incorrect part in the past.

Related Part	ECM
	Skid control ECU (Brake actuator assembly) (w/ ABS)

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

ECM

for 1ZR-FE: Click hereEngine / Hybrid System>1ZR-FE ENGINE CONTROL>ECM>REMOVAL

for 2ZR-FE: Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL

for 2NZ-FE: Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>ECM>REMOVAL

·

Skid control ECU (Brake actuator assembly) (w/ ABS)

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR>REMOVAL

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

NOTICE:: If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.; Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION

Result:

Result	Proceed to
Any of the related parts have the incorrect part number.	A
All of the related parts have the correct part number, or a related part and power steering ECU assembly have not been replaced.	B