Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZY3K
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1581; Assist Map Number Un-Writing; 2017 - 2020 MY Sienna [08/2016 -        ]

DTC

C1581

Assist Map Number Un-Writing

DESCRIPTION

When a map is not recorded in the steering column assembly (power steering ECU), then this DTC is stored.

DTC No.

DTC Detection Condition

Trouble Area

C1581

Assist map not written in power steering ECU

  • Assist map is not written
  • CAN communication system
  • SFI system
  • Vehicle stability control system
  • Steering column assembly

CAUTION / NOTICE / HINT

NOTICE:

When the steering column assembly is replaced, perform the assist map writing (See page 2016 - 2020 MY Sienna [12/2015 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: REGISTRATION ).

PROCEDURE

1.

PERFORM ASSIST MAP WRITING

(a) Perform the assist map writing (See page 2016 - 2020 MY Sienna [12/2015 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: REGISTRATION ).

NEXT

2.

CHECK DTC OUTPUT

(a) Check for DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC C1581 is not output

A

DTC C1581 is output

B

A

END

B

3.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs of the CAN communication system (See page 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2018 MY Sienna [11/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2019 - 2020 MY Sienna [08/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM ).

Result

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO CAN COMMUNICATION SYSTEM

(See page 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2018 - 2020 MY Sienna [11/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING )

A

4.

CHECK ECM

(a) Check that the correct ECM is installed.

OK:

The correct ECM is installed.

NG

REPLACE ECM

OK

5.

CHECK SFI SYSTEM

(a) Check for DTCs of the SFI system (See page 2017 - 2020 MY Sienna [08/2016 -        ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO SFI SYSTEM

A

6.

CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

(a) Check that the correct brake actuator assembly (skid control ECU) is installed.

OK:

The correct brake actuator assembly (skid control ECU) is installed.

NG

REPLACE BRAKE ACTUATOR ASSEMBLY

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR: REMOVAL )

OK

7.

CHECK VEHICLE STABILITY CONTROL SYSTEM

(a) Check the vehicle stability control system (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR 2018 - 2020 MY Sienna [11/2017 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTCs are not output

A

DTCs are output

B

A

REPLACE STEERING COLUMN ASSEMBLY

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2018 - 2020 MY Sienna [11/2017 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DIAGNOSTIC TROUBLE CODE CHART )