Toyota Sienna Service Manual: Communication Error of Yaw Rate Sensor

Toyota Sienna Service Manual / Cruise control / Dynamic laser cruise control system / Diagnostic trouble code chart / Communication Error of Yaw Rate Sensor

DTC U0123 Communication Error of Yaw Rate Sensor

DESCRIPTION

This circuit detects the yaw rate of the vehicle and transmits its signal to the skid control ECU and distance control ECU.

DTC No.	DTC Detection Condition	Trouble Area
U0123	While the dynamic laser cruise control is either preparing for operation or operating, the ECM continuously receives a yaw rate sensor malfunction signal for a certain amount of time	Communication circuit Yaw rate sensor Distance control ECU ECM

INSPECTION PROCEDURE

HINT: This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

1 CHECK CAN COMMUNICATION SYSTEM

Refer to HOW TO PROCEED WITH TROUBLESHOOTING

END

Communication Error from ECM to VSC

DTC P1631 Communication Error from ECM to VSC DTC U0100 Lost Communication with ECM/PCM "A" DESCRIPTION The ECM sends signals such as A/T information signals, dynamic laser cruise contr ...

Lost Communication with Steering Angle Sensor Module

DTC U0126 Lost Communication with Steering Angle Sensor Module DESCRIPTION This circuit detects the angle and direction of the steering wheel and automatically transmits a signal to the skid con ...

Other materials:

Disassembly
1. REMOVE PARKING BRAKE PEDAL BRACKET PROTECTOR (a) Using a flat-head screwdriver, disengage the 2 claws on the parking brake pedal bracket protector. (b) Turning the parking brake pedal bracket protector clockwise, remove the parking brake pedal bracket protector from the parking brake ...

Brake Switch "A" Circuit
DTC P0571 Brake Switch "A" Circuit DESCRIPTION When the brake pedal is depressed, the stop light switch sends a signal to the ECM. When the ECM receives this signal, it cancels the cruise control. The fail-safe function operates to enable normal driving even if there is a malfuncti ...

Brake
GENERAL MAINTENANCE 1. INSPECT BRAKE LINE PIPES AND HOSES HINT: Check the entire circumference and length of the brake hoses using a mirror as required in a well-lighted area. Turn the front wheels fully right or left before checking the front brakes. (a) Check all the brake lines and h ...