Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ8H
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: U0073,U0126,U0129,U0140,U1110; Control Module Communication Bus Off; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

U0073

Control Module Communication Bus Off

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DTC

U0129

Lost Communication with Brake System Control Module

DTC

U0140

Lost Communication with Main Body ECU

DTC

U1110

Lost Communication with Clearance Sonar Module

DESCRIPTION

These DTCs are stored if there is a malfunction in the CAN communication system connected to the parking assist ECU.

HINT:

If CAN communication system DTCs are stored, they may also be stored in other systems.

DTC Code

DTC Detection Condition

Trouble Area

U0073

Control module communication bus off

CAN communication system

U0126

Lost communication with steering angle sensor

U0129

Lost communication with brake system

U0140

Lost communication with main body ECU

U1110

Lost communication with clearance sonar module

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: DTC CHECK / CLEAR ).

(b) Check for DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC is output

A

No DTC is output

B

HINT:

  • If the CAN communication system has been inspected and repaired in other systems, the DTCs will not be output when rechecking for DTCs.
  • If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even though the DTC was not output when rechecking for DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
A

GO TO CAN COMMUNICATION SYSTEM

(See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING )

B

USE SIMULATION METHOD TO CHECK

(See page 2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING )