Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018K2Q
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: U0100,U0101,U0123,U0129,U0142; Lost Communication with ECM / PCM "A"; 2018 - 2020 MY Sienna [11/2017 -        ]

DTC

U0100

Lost Communication with ECM / PCM "A"

DTC

U0101

Lost Communication with TCM

DTC

U0123

Lost Communication with Yaw Rate Sensor Module

DTC

U0129

Lost Communication with Brake System Control Module

DTC

U0142

Lost Communication with Body Control Module "B"

DESCRIPTION

When a malfunction is detected between various ECUs and sensors, these DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • ECM
  • Forward recognition camera

U0101

Lost Communication with TCM

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the TCM (ECM) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • TCM (ECM)
  • Forward recognition camera

U0123

Lost Communication with Yaw Rate Sensor Module

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the yaw rate sensor (airbag sensor assembly) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Yaw rate sensor (Airbag sensor assembly)
  • Forward recognition camera

U0129

Lost Communication with Brake System Control Module

2 seconds after the ignition switch is turned to ON, a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Forward recognition camera

U0142

Lost Communication with Body Control Module "B"

2 seconds after the ignition switch is turned to ON, a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Main body ECU (Multiplex network body ECU)
  • Forward recognition camera

PROCEDURE

1.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the ignition switch to ON and wait 2 seconds or more.
  2. Drive the vehicle at a speed of 1 km/h or 1 mph or more for 5 seconds or more.

(c) Check for DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC U0100, U0101, U0123, U0129 and U0142 are not output

A

DTC U0100, U0101, U0123, U0129 or U0142 is output

B
A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM