Dtc C1581 Assist Map Number Un-Writing

Steering. Corolla. Zre142 Aze141
Power Assist Systems. Corolla. Zre142 Aze141

DESCRIPTION

INSPECTION PROCEDURE

PERFORM ASSIST MAP WRITING

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

DTC C1581 Assist Map Number Un-Writing


DESCRIPTION

The power steering ECU 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
Power steering ECU

INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305CX.html).
1.PERFORM ASSIST MAP WRITING

  1. Turn the ignition switch on (IG).

  1. Wait for 1 second or more.

  1. Check for DTCs.

    HINT:
    Approximately 1 second after turning the ignition switch on (IG), the assist map writing is automatically performed. After the automatic assist map writing, DTC C1581 is erased.
    OK:
    DTC C1581 is not output.


NG
Go to step 2
OK

END (COMPLETION OF ASSIST MAP WRITING RETURNS SYSTEM TO NORMAL)

2.CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

  1. Check for DTCs.

    OK:
    DTC is not output.


NG
GO TO CAN COMMUNICATION SYSTEM (COROLLA_ZRE142 RM000000WI60ACX.html)
OK

REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605AX.html)