Toyota CH-R Service Manual: Assist Map Number Mismatch (C1582)

Toyota CH-R Service Manual / Power Assist Systems / Power Steering System / Assist Map Number Mismatch (C1582)

DESCRIPTION

When an incorrect ECM, main body ECU (multiplex network body ECU) or skid control ECU (brake actuator assembly) is installed after the assist map has been written to the power steering ECU assembly, DTC C1582 is stored because the information stored in the power steering ECU 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 main body ECU (multiplex network body ECU) Incorrect skid control ECU (brake actuator assembly) Power steering ECU assembly	EPS warning light: Does not come on	Assist Map Writing is performed or the ignition switch is turned 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 here

HINT:

Related parts store information necessary for assist map writing.

Related Part:

ECM
Main body ECU (Multiplex network body ECU)
Skid control ECU (Brake actuator 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

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK RELATED PART

(a) Check if the part below has been replaced with an incorrect part in the past.

Related Part	ECM
	Main body ECU (Multiplex network body ECU)
	Skid control ECU (Brake actuator assembly)

NOTICE:

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

ECM
Click here
Main body ECU (Multiplex network body ECU)
Click here
Skid control ECU (Brake actuator assembly)

(b) 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.

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 power steering ECU assembly have not been replaced.	B

REPLACE POWER STEERING ECU ASSEMBLY

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
Main body ECU (Multiplex network body ECU)
Click here
Skid control ECU (Brake actuator assembly)

4.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Chassis > EMPS > Trouble Codes

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

END

REPLACE POWER STEERING ECU ASSEMBLY

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