PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: U0100,U0125,U0126,U0129,U0142; Lost Communication with ECM / PCM "A"; 2018 - 2020 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000001983O
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - ]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: U0100,U0125,U0126,U0129,U0142; Lost Communication with ECM / PCM "A"; 2018 - 2020 MY Sienna [11/2017 - ]

DTC

U0100

Lost Communication with ECM / PCM "A"

DTC

U0125

Lost Communication with Yaw Rate Sensor Module

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DTC

U0129

Lost Communication with Brake System Control Module

DTC

U0142

Lost Communication with Body Control Module "B"

DESCRIPTION

These DTCs are stored if there is a malfunction in the CAN communication system connected to the blind spot monitor sensor.

HINT:

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

DTC No.	DTC Detection Condition	Trouble Area
U0100	Lost communication with ECM	CAN communication system
U0125	Lost communication with yaw rate sensor
U0126	Lost communication with steering sensor
U0129	Lost communication with brake system
U0142	Lost communication with main body ECU

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is on.

CHECK DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

Result	Proceed to
DTCs are output	A
No DTCs are output	B

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.
If the CAN communication system has been inspected and repaired, 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 ).

GO TO CAN COMMUNICATION SYSTEM

(See page )