Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIQ3
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: U0073,U0100,U0126,U0129; Control Module Communication Bus OFF; 2016 MY Sienna [12/2015 - 08/2016]

DTC

U0073

Control Module Communication Bus OFF

DTC

U0100

Lost Communication with ECM / PCM "A"

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DTC

U0129

Lost Communication with Brake System Control Module

DESCRIPTION

  • The 4WD control ECU inputs the signals sent from the ECM and skid control ECU via the CAN communication system.
  • When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

DTC No.

DTC Detection Condition

Trouble Area

U0073
  1. When the following continues for 5 seconds or more:

    - Signals from the 4WD control ECU are not received.

  2. When the following occurs 10 times consecutively:

    - A communication malfunction (bus off) occurs one or more times within 0.1 seconds.

CAN communication system

U0100
  1. When both of the following continue for 2 seconds or more:

    - The voltage of the IG1 terminal is 10 V or more.

    - At a vehicle speed of 60 km/h (38 mph) or more, communication with the ECM cannot be performed.

CAN communication system

U0126
  1. When both of the following continue for 1 second or more:

    - The voltage of the IG1 terminal is 10 V or more.

    - Communication with the steering angle sensor cannot be performed.

  2. When all of the following occur 10 times consecutively:

    - The condition that communication with the steering angle sensor cannot be performed occurs once within 5 seconds.

    - The voltage of the IG1 terminal is 10 V or more.

    - Occurs 10 times or more within 60 seconds.

CAN communication system

U0129
  1. When the following continues for 3 seconds or more:

    - The voltage of the IG1 terminal is 10 V or more.

    - Communication with the skid control ECU cannot be performed.

CAN communication system

PROCEDURE

1.

CHECK FOR DTC (ACTIVE TORQUE CONTROL 4WD SYSTEM)

(a) Check for DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: DTC CHECK / CLEAR ).

(b) Record the output DTCs (active torque control 4WD system).

HINT:

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

NEXT

GO TO CAN COMMUNICATION SYSTEM