Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YNY3
Model Year Start: 2022 Model: Avalon HV Prod Date Range: [08/2021 -           ]
Title: CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: U010487; Lost Communication with Cruise Control Module Missing Message; 2022 MY Avalon Avalon HV [08/2021 -        ]

DTC

U010487

Lost Communication with Cruise Control Module Missing Message

DESCRIPTION

The millimeter wave radar sensor assembly communicates with the forward recognition camera via CAN communication.

If a communication error is detected between the forward recognition camera and millimeter wave radar sensor assembly, the millimeter wave radar sensor assembly stores this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U010487

Lost Communication with Cruise Control Module Missing Message

Detection condition:

  • Ignition switch ON

Malfunction status:

  • Communication malfunction with the forward recognition camera is detected

Malfunction duration:

  • 10 seconds or more
  • Pre-collision system
  • Forward recognition camera
  • Millimeter wave radar sensor assembly

Pattern

DTC output part name

(Display on Techstream)

Suspected Area (Malfunction Status)

Millimeter Wave Radar Sensor Assembly

Forward Recognition Camera

Front Radar Sensor

Pre-Collision System

Lane Control

Forward Recognition Camera (Front Lighting Control)

Radar Cruise2

U010487

U023587

U023587

U023587

U023587
○: DTC is output

-: DTC is not output

Pattern 1

○

○

○

○

○

Harness or connector (Open or short)

Millimeter wave radar sensor assembly (Internal malfunction)

Forward recognition camera (Internal malfunction)

Pattern 2

○

-

-

-

-

Forward recognition camera (Internal malfunction)

Millimeter wave radar sensor assembly (Internal malfunction)

HINT:

If the DTCs are output simultaneously, the inspection area can be narrowed down.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
  • When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly beam axis alignment and to clear the vehicle control history. Before performing the Driving Adjustment, make sure to read Before Starting Driving Adjustment.

    HINT:

    Beam axis alignment of the millimeter wave radar sensor assembly can be performed using either Triangle Target, Flat Surface Target or Driving Adjustment.

    Triangle Target: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(TRIANGLE TARGET)

    Flat Surface Target: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(FLAT SURFACE TARGET)

    Driving Adjustment: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: DRIVING ADJUSTMENT

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
  • When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.

    HINT:

    Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

    One Time Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(SEQUENTIAL RECOGNITION)

    Driving Adjustment: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: DRIVING ADJUSTMENT

PROCEDURE

1.

CHECK FOR DTCs

(a) Read each DTC and check the diagnosis pattern using the table below.

Body Electrical > Front Radar Sensor > Trouble Codes

Body Electrical > Pre-Collision System > Trouble Codes

Chassis > Lane Control > Trouble Codes

Body Electrical > Front Recognition Camera (Front Lighting Control) > Trouble Codes

Powertrain > Radar Cruise2 > Trouble Codes

Pattern

DTC output part name

(Display on Techstream)

Front Radar Sensor

Pre-Collision System

Lane Control

Forward Recognition Camera (Front Lighting Control)

Radar Cruise2

Pattern 1

U010487

U023587

U023587

U023587

U023587

Pattern 2

U010487

-

-

-

-

Result

Proceed to

Pattern 1

A

Pattern 2

B
A

GO TO PRE-COLLISION SYSTEM

B

2.

CHECK FORWARD RECOGNITION CAMERA

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

(a) Disconnect the millimeter wave radar sensor assembly connector.

(b) Using an oscilloscope, check the waveform.

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

A37-5 (CA1P) - A37-6 (CA1N)

Ignition switch ON

1V/DIV., 100μs./DIV.

Pulse generation
OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

REPLACE FORWARD RECOGNITION CAMERA