Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM10000000103QF
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: C1280; Engine Circuit Malfunction; 2017 - 2020 MY Sienna [08/2016 -        ]

DTC

C1280

Engine Circuit Malfunction

DESCRIPTION

If a malfunction in the ECM circuit occurs, the 4WD control ECU will output this DTC.

DTC No.

DTC Detection Condition

Trouble Area

C1280
  • When the following continues for 5 seconds or more:

    - Communication with engine control ECM is operating normally, but SFI system is malfunctioning.
  • SFI system
  • 4WD control ECU

CAUTION / NOTICE / HINT

HINT:

Check the condition of each related circuit connector before troubleshooting (See page 2016 - 2020 MY Sienna [12/2015 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

PROCEDURE

1.

CHECK FOR DTC (SFI SYSTEM)

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

Result

Result

Proceed to

SFI system DTC is not output

A

SFI system DTC is output

B
A

REPLACE 4WD CONTROL ECU

B

GO TO SFI SYSTEM

(See page 2017 MY Sienna [08/2016 - 11/2017]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2018 MY Sienna [11/2017 - 08/2018]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2019 - 2020 MY Sienna [08/2018 -        ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART )