Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJSY
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: U0122,U0123,U0126,U0140,U0151,U1100; Lost Communication with Vehicle Dynamics Control Module; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

U0122

Lost Communication with Vehicle Dynamics Control Module

DTC

U0123

Lost Communication with Yaw Rate Sensor Module

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DTC

U0140

Lost Communication with Main Body ECU

DTC

U0151

Lost Communication with Airbag ECU

DTC

U1100

Lost Communication with Seat Belt Control ECU

DESCRIPTION

  • The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle. Based on this information, the driving support ECU sends pre-collision control operation signals. These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that perform the pre-collision control.

DTC No.

DTC Detection Condition

Trouble Area

U0122
  • When the ignition switch is ON, a communication error between the skid control ECU and the driving support ECU is detected for approximately. 5 seconds.
  • When the ignition switch is ON, a communication error between the skid control ECU assembly and the seat belt control ECU is detected for approximately. 3 seconds.
  • Brake actuator (skid control ECU)
  • CAN communication system
  • Seat belt control ECU
  • Driving support ECU

U0123

When the ignition switch is ON, a communication error between the yaw rate sensor and the driving support ECU is detected for approximately. 1 second.
  • Yaw rate sensor
  • CAN communication system
  • Driving support ECU

U0126

When the ignition switch is ON, a communication error between the steering sensor and the driving support ECU is detected for approximately. 1 second.
  • Steering angle sensor
  • CAN communication system
  • Driving support ECU

U0140

While ignition switch is ON, communication stop between main body ECU and seat belt control ECU continues for 6 seconds or more.
  • Main body ECU
  • CAN communication system
  • Seat belt control ECU

U0151

While ignition switch is ON, communication stop between center airbag sensor and seat belt control ECU continues for 6 seconds or more.
  • Center airbag sensor assembly
  • CAN communication system
  • Seat belt control ECU

U1100

When the ignition switch is ON, a communication error between the seat belt control ECU and the driving support ECU is detected for approximately. 9 seconds.
  • Seat belt control ECU
  • CAN communication system
  • Driving support ECU

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system between performing the following inspection procedure.
  • Confirm that the connector is securely connected, as a partially connected connector is suspected for the cause of this DTC.

PROCEDURE

1.

CHECK FOR DTCs (PRE-COLLISION 2)

(a) Clear the DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PRE-COLLISION: PRE-COLLISION SYSTEM: DTC CHECK / CLEAR ).

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(c) Check the DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PRE-COLLISION: PRE-COLLISION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

CAN communication system DTCs are not output

A

CAN communication system DTCs are output

B
A

USE SIMULATION METHOD TO CHECK
B

GO TO CAN COMMUNICATION SYSTEM

(See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING )