CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U010008,U010087,U012287,U012387,U012687,U110487; Lost Communication with ECM/PCM "A" Bus Signal / Message Failure; 2017 MY Sienna [08/2016

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000ZX9P
Model Year Start: 2017	Model: Sienna	Prod Date Range: [08/2016 - 11/2017]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U010008,U010087,U012287,U012387,U012687,U110487; Lost Communication with ECM/PCM "A" Bus Signal / Message Failure; 2017 MY Sienna [08/2016 - 11/2017]

DTC

U010008

Lost Communication with ECM/PCM "A" Bus Signal / Message Failure

DTC

U010087

Lost Communication with ECM/PCM "A" Missing Message

DTC

U012287

Lost Communication with Vehicle Dynamics Control Module Missing Message

DTC

U012387

Lost Communication with Yaw Rate Sensor Module Missing Message

DTC

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

DTC

U110487

Lost Communication with Driving Support ECU Missing Message

DESCRIPTION

The ECM communicates several signals with each sensor and ECU by CAN communication circuit.

If there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

DTC No.	DTC Detection Condition	Trouble Area	MIL
U010008	While the dynamic radar cruise control is either preparing for operation or operating, if the ECM continuously receives a communication cut off signal from the driving support ECU for more than a specific amount of time, the ECM records this communication cut off code	Communication circuit ECM Driving support ECU	Does not come on
U010008	While the dynamic radar cruise control is either preparing for operation or operating, if the ECM continuously receives a communication cut off signal from the skid control ECU for a certain amount of time, the ECM records this communication cut off code	Communication circuit ECM Brake actuator assembly (Skid control ECU)	Does not come on
U010087	While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a communication cut-off signal from the brake actuator assembly (skid control ECU) for approximately 1 second or more.	Communication circuit ECM Brake actuator assembly (Skid control ECU)	Does not come on
U012287	While dynamic radar cruise control is either preparing for operation or operating, if communication data from the skid control ECU is invalid for a certain amount of time, the ECM records the communication cut off code	Communication circuit Brake actuator assembly (Skid control ECU) ECM	Does not come on
U012387	While the dynamic radar cruise control is either preparing for operation or operating, the ECM continuously receives a yaw rate and acceleration sensor malfunction signal for a certain amount of time	Communication circuit Yaw rate and acceleration sensor Driving support ECU ECM	Does not come on
U012687	While the dynamic radar cruise control is either preparing for operation or operating, if the ECM continuously receives a steering sensor communication error signal for a certain amount of time, the driving support ECU sends a signal to the ECM to record this trouble code	Communication circuit Steering angle sensor Driving support ECU ECM	Does not come on
U110487	While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and ECM is detected for 1 second or more.	Communication circuit ECM Driving support ECU	Does not come on

PROCEDURE

1.	CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTCs (See page ).

CHECK CAN COMMUNICATION SYSTEM