Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Lost Communication with Yaw Rate Sensor Module (U0125,U0126,U0129,U0293)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Cruise Control / Dynamic Radar Cruise Control System(for Hv Model) / Lost Communication with Yaw Rate Sensor Module (U0125,U0126,U0129,U0293)

DESCRIPTION

The driving support ECU assembly communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

U0125

Lost Communication with Yaw Rate Sensor Module

While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the yaw rate and acceleration sensor (airbag sensor assembly) and driving support ECU assembly is detected for approximately 1 second or more.
  • CAN communication system
  • Yaw rate and acceleration sensor (Airbag sensor assembly)
  • Driving support ECU assembly

Does not come on

U0126

Lost Communication with Steering Angle Sensor Module

While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the steering sensor and driving support ECU assembly is detected for approximately 1 second or more.
  • CAN communication system
  • Steering sensor
  • Driving support ECU assembly

Does not come on

U0129

Lost Communication with Brake System Control Module

While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (brake booster with master cylinder assembly) and driving support ECU assembly is detected for approximately 2.5 seconds or more.
  • CAN communication system
  • skid control ECU (brake booster with master cylinder assembly)
  • Driving support ECU assembly

Does not come on

U0293

Lost Communication with Hybrid Vehicle Control System

While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the Hybrid vehicle control ECU and driving support ECU assembly is detected for approximately 1 seconds or more.
  • CAN communication system
  • Hybrid vehicle control ECU
  • Driving support ECU assembly

Does not come on

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > Clear DTCs

(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 for DTCs.

Powertrain > Radar Cruise2 > Trouble Codes

Result

Proceed to

DTC U0125, U0126, U0129 and U0293 are not output

A

DTC U0125, U0126, U0129 or U0293 is output

B
A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

    Terminals Of Ecu

    Lost Communication with Cruise Control Front Distance Range Sensor (U0235)

    See More:

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