Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000012W21
Model Year Start: 2018 Model: Camry Prod Date Range: [03/2017 - 10/2020]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: U0100,U0125,U0126,U0129,U0155; Lost Communication with ECM / PCM "A"; 2018 - 2020 MY Camry [03/2017 - 10/2020]

DTC

U0100

Lost Communication with ECM / PCM "A"

DTC

U0125

Lost Communication with Yaw Rate Sensor Module

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DTC

U0129

Lost Communication with Brake System Control Module

DTC

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

DESCRIPTION

These DTCs are stored when a communication malfunction occurs between ECUs that perform pre-collision system control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the ECM and millimeter wave radar sensor assembly is detected for approximately 5 seconds.
  • CAN communication system
  • ECM
  • Millimeter wave radar sensor assembly

U0125

Lost Communication with Yaw Rate Sensor Module

When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the yaw rate sensor (airbag sensor assembly) and millimeter wave radar sensor assembly is detected for approximately 1 second.
  • CAN communication system
  • Yaw rate sensor (Airbag sensor assembly)
  • Millimeter wave radar sensor assembly

U0126

Lost Communication with Steering Angle Sensor Module

When the ignition switch is ON, a communication error between the steering sensor and millimeter wave radar sensor assembly is detected for approximately 4 seconds.
  • CAN communication system
  • Steering sensor
  • Millimeter wave radar sensor assembly

U0129

Lost Communication with Brake System Control Module

When the ignition switch is ON, a communication error between the skid control ECU (brake actuator assembly) and millimeter wave radar sensor assembly is detected for approximately 3 seconds.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Millimeter wave radar sensor assembly

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

When the ignition switch is ON, a communication error between the combination meter assembly and millimeter wave radar sensor assembly is detected for approximately 8 seconds.
  • CAN communication system
  • Combination meter assembly
  • Millimeter wave radar sensor assembly

PROCEDURE

1.

CHECK FOR DTCs (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

Body Electrical > Pre-Collision 2 > Clear DTCs

(b) Perform the following procedure.

HINT:

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

  1. Drive the vehicle at a speed of 5 km/h (4 mph) or more for 8 seconds or more.

(c) Check for DTCs.

Body Electrical > Pre-Collision 2 > Trouble Codes

Result

Proceed to

DTC U0100, U0125, U0126, U0129 and U0155 are not output

A

DTC U0100, U0125, U0126, U0129 or U0155 is output

B
A

USE SIMULATION METHOD TO CHECK 2018 MY Camry [03/2017 - 06/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2018 MY Camry [06/2017 - 08/2018]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2019 MY Camry [08/2018 - 09/2019]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry [09/2019 - 03/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry [03/2020 - 10/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

B

GO TO CAN COMMUNICATION SYSTEM