DTC    C1581    Assist Map Number Un-Writing


DESCRIPTION

The power steering ECU assembly outputs this DTC when it determines that the assist map is not written in the ECU.

DTC No.
DTC Detection Condition
Trouble Area
C1581
Assist map not written in power steering ECU assembly
  1. Power steering ECU assembly
  2. CAN communication system
  3. ECM

INSPECTION PROCEDURE

NOTICE:
  1. If the power steering ECU assembly has been replaced, perform the torque sensor zero point calibration and assist map writing (Click here).
1.PERFORM ASSIST MAP WRITING
  1. Perform assist map writing (Click here).


NEXT


2.CONFIRM DTC
  1. Check for DTCs (Click here).

    OK:
    DTC C1581 is not output.

    HINT:
    DTC C1581 will be cleared after the assist map is written.


NG
Go to step 3
OK

END 

3.CHECK CAN COMMUNICATION SYSTEM
  1. Check for DTCs of the CAN communication system (Click here).

    Result 
    Result
    Proceed to
    DTCs is not output
    A
    DTCs is output
    B


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A


4.CHECK ECM
  1. Check if an ECM that complies with the vehicle specifications is installed.

    OK:
    The ECM that complies with vehicle specifications is installed.


NG
REPLACE ECM (Click here)
OK

REPLACE POWER STEERING ECU ASSEMBLY (Click here)