CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): U012287-U110487; Lost Communication with Vehicle Dynamics Control Module Missing Message; 2019 - 2021 MY Avalon HV [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001B56Z
Model Year Start: 2019	Model: Avalon HV	Prod Date Range: [04/2018 - 08/2021]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): U012287-U110487; Lost Communication with Vehicle Dynamics Control Module Missing Message; 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]

DTC

U012287

Lost Communication with Vehicle Dynamics Control Module Missing Message

DTC

U029387

Lost Communication With Hybrid Powertrain Control Module Missing Message

DTC

U110487

Lost Communication with Driving Support ECU Missing Message

DESCRIPTION

The Hybrid vehicle control ECU 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
U012287	Lost Communication with Vehicle Dynamics Control Module Missing Message	When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (brake booster with master cylinder assembly) and Hybrid vehicle control ECU is detected for approximately 2.6 seconds or more.	CAN communication system Hybrid vehicle control ECU skid control ECU (brake booster with master cylinder assembly)	Does not come on
U029387	Lost Communication With Hybrid Powertrain Control Module Missing Message	While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU continuously receives a communication cut-off signal from the skid control ECU (brake booster with master cylinder assembly) for approximately 1 second or more.	CAN communication system Hybrid vehicle control ECU Skid control ECU (brake booster with master cylinder assembly)	Does not come on
U110487	Lost Communication with Driving Support ECU Missing Message	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 Hybrid vehicle control ECU is detected for 1 second or more.	CAN communication system Hybrid vehicle control ECU Driving support ECU assembly	Does not come on

1.	CHECK FOR DTCs

(a) Clear the 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.

Result	Proceed to
DTC U012287, U029387 and U110487 are not output	A
DTC U012287, U029387 or U110487 is output	B