Toyota Venza: Assist Map Number Un-Writing (C1581)

DESCRIPTION

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

HINT:

The assist map is data written in the power steering ECU to control the degree of assistance. The assist map is selected based on the vehicle's specified communication data.

PROCEDURE

(a) Initialize the rotation angle sensor value and calibrate the torque sensor zero point (See page ).

HINT:

The assist map is automatically written during the rotation angle sensor initialization and torque sensor zero point calibration.

NEXT

(a) Check for DTCs (See page ).

OK:

DTC C1581 is not output.

HINT:

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

OK

END

NG

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the CAN communication system (See page ).

OK:

DTC is not output.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

(a) Check if an ECM that complies with the vehicle specifications is installed.

OK:

ECM that complies with vehicle specifications is installed.

B

REPLACE ECM

C

REPLACE ECM

A

(a) Check if a brake actuator assembly (skid control ECU) that complies with the vehicle specifications is installed.

OK:

Brake actuator assembly (skid control ECU) that complies with vehicle specifications is installed.

OK

REPLACE POWER STEERING ECU

NG

REPLACE BRAKE ACTUATOR ASSEMBLY