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

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

CHECK FOR DTC (SFI SYSTEM)

DTC C1581 Assist Map Number Un-Writing


DESCRIPTION

DTC C1581 will be stored if the power steering ECU determines that the assist map is not written in the ECU.

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

INSPECTION PROCEDURE

NOTICE:
If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305DX.html).
1.PERFORM ASSIST MAP WRITING

  1. Perform the assist map writing (COROLLA_ZRE142 RM00000275305DX.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (COROLLA_ZRE142 RM00000275005PX.html).

    Result:
    Result
    		Proceed to
    DTC is still output even after performing assist map writing 3 times.
    		A
    DTC is still output even after performing assist map writing once or twice*1
    		B
    DTC is not output.
    		C
    HINT:
    *1: Perform the assist map writing again if DTC C1581 is still output even after the assist map writing is performed once or twice.


B
PERFORM ASSIST MAP WRITING AGAIN (COROLLA_ZRE142 RM00000275305DX.html)

C
END
A


3.CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

  1. Check for DTCs (COROLLA_ZRE142 RM00000275005PX.html).

    OK:
    DTC is not output.
    HINT:
    If the CAN communication system DTC is output, first troubleshoot the CAN communication system malfunction, then perform the assist map writing again (COROLLA_ZRE142 RM00000275305DX.html).


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


4.CHECK FOR DTC (SFI SYSTEM)

  1. Check for DTCs (COROLLA_ZRE142 RM000000PDK0ZAX.html).

    OK:
    DTC is not output.
    HINT:
    If the SFI system DTC is output, first troubleshoot the SFI system, then perform the assist map writing again (COROLLA_ZRE142 RM00000275305DX.html).


NG
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (COROLLA_ZRE142 RM000000PDF0G8X.html)
OK

REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605BX.html)