Toyota Avalon Service & Repair Manual: Lost Communication with Driving Support ECU (U1104)

DESCRIPTION

The driving support ECU assembly sends vehicle speed and vehicle condition information to the millimeter wave radar sensor assembly. The millimeter wave radar sensor assembly then sends information on the presence, distance, and relative speed of objects in front of the vehicle to the driving support ECU assembly. The driving support ECU assembly sends this information to the ECM and the ECM operates the dynamic radar cruise control system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

U1104

Lost Communication with Driving Support ECU

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 driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 1 second.

Pre-collision system

Does not come on

PROCEDURE

1.

GO TO PRE-COLLISION SYSTEM

HINT:

If DTC U1104 is output by the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.

Click here

NEXT

END

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    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

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