POWER STEERING SYSTEM, Diagnostic DTC:C1582

DTC Code	DTC Name
C1582	Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM, an incorrect main body ECU (multiplex network body ECU) or an incorrect skid control ECU (brake actuator assembly) is installed after the assist map has been written 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 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	Clear assist map and assist map written	-

CAUTION / NOTICE / HINT

Note:

If the power steering ECU assembly has been replaced with a new one, perform assist map writing and torque sensor zero point calibration.

Click here

Tip:

The 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

CHECK CAN COMMUNICATION SYSTEM

Check for DTCs.

Click here

Result


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

B

GO TO CAN COMMUNICATION SYSTEM

Click here

A

CHECK RELATED PART

Check if any of the parts listed below have 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)

Note:

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

ECM
for 1AD-FTV:Click here
for 1ND-TV:Click here
for 1NR-FE:Click here
for 1ZR-FAE:Click here
Main body ECU (Multiplex network body ECU)
for LHD:Click here
for RHD:Click here
Skid control ECU (Brake actuator assembly)
Click here

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

Note:
If the power steering ECU assembly has been replaced with a new one, perform assist map writing and torque sensor zero point calibration.

Click here

Result


Result	Proceed to
Part with incorrect part number is installed.	A
Parts with the correct part number are installed, or a related part and power steering ECU assembly have not been replaced.	B

B

REPLACE POWER STEERING ECU ASSEMBLY

Click here

A

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

Replace the related parts with ones that have the correct part number.
- ECM
  for 1AD-FTV:Click here
  for 1ND-TV:Click here
  for 1NR-FE:Click here
  for 1ZR-FAE:Click here
- Main body ECU (Multiplex network body ECU)
  for LHD:Click here
  for RHD:Click here
- Skid control ECU (Brake actuator assembly)
  Click here

Result


Proceed to
NEXT

Check for DTCs.

Click here

Chassis > EMPS > Trouble Codes

Result


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

A

END

B

REPLACE POWER STEERING ECU ASSEMBLY

Click here