Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIZT
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1582; Assist Map Number Mismatch; 2016 MY Sienna [12/2015 - 08/2016]

DTC

C1582

Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM or brake actuator assembly (skid control ECU) is installed after the assist map has been recorded in the steering column assembly (power steering ECU), then DTC C1582 is stored because the data does not match the vehicle specifications.

DTC No.

DTC Detection Condition

Trouble Area

C1582

Assist map number mismatch

  • CAN communication system
  • Incorrect ECM
  • Incorrect brake actuator assembly (Skid control ECU)
  • Steering column assembly

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs of the CAN communication system (See page 2016 MY Sienna [12/2015 - 08/2016]; 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

A

2.

CHECK ECM

(a) Check that the correct ECM is installed.

OK:

The correct ECM is installed.

NG

REPLACE ECM

OK

3.

CHECK SFI SYSTEM

(a) Check for DTCs of the SFI system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (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

4.

CHECK BRAKE ACTUATOR ASSEMBLY

(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

OK

5.

CHECK VEHICLE STABILITY CONTROL SYSTEM

(a) Check for DTCs of 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 ).

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