Dtc C1581/26 Assist Map Number Un-Writing

Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Power Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

INSPECTION PROCEDURE

PERFORM ASSIST MAP WRITING

CHECK P/S WARNING LIGHT

CHECK DTC

DTC C1581/26 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.
HINT:
The assist map data is written in the power steering ECU to control assisting power.
The assist map has 3 types. Select an assist map according to the vehicle country information that is recorded in the ECU.

DTC No.
DTC Detection Condition
Trouble Area
C1581/26
Assist map not written in power steering ECU
Power steering ECU

INSPECTION PROCEDURE

1.PERFORM ASSIST MAP WRITING

  1. Turn the ignition switch on (IG).

  1. Connect the intelligent tester to the DLC3 and press the intelligent tester main switch ON.

    HINT:
    At this time, check that the P/S warning light is illuminated.

    1. Select signal check, and change to test mode.

  1. Wait for 3 seconds.


NEXT


2.CHECK P/S WARNING LIGHT

  1. Check the P/S warning light.

    Result
    Result
    		Proceed to
    P/S warning light illuminates
    		A
    P/S warning light blinks at 0.25 second intervals
    		B

    HINT:
    If the P/S warning light blinks at 0.25 second intervals, the assist map adjustment has completed normally.


B
END
A


3.CHECK DTC

  1. Check for DTC.

    Result
    Result
    		Proceed to
    C1581/26 output
    Assist map write adjustment operation not completed 3 times or more
    		A
    C1581/26 output
    Assist map write adjustment operation not completed less than 3 times
    		B
    Code other than C1581/26 is output
    		C

    HINT:
    If DTC C1581/26 is output, turn the ignition switch off. Enter test mode again. If the DTC is output 3 times in a row, replace the power steering ECU.


B
Go to step 1

C
REFER TO DTC
A

REPLACE POWER STEERING ECU