Toyota Yaris: Power Steering System / Lost Communication with Steering Angle Sensor Module Missing Message (U012687,U010087,U012987,U014087,U023A87)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Steering / Power Assist Systems / Power Steering System / Lost Communication with Steering Angle Sensor Module Missing Message (U012687,U010087,U012987,U014087,U023A87)

DESCRIPTION

The power steering ECU assembly receives signals from the steering sensor, skid control ECU (brake actuator assembly), forward recognition camera, ECM and clearance warning ECU assembly via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition	Note
U010087	Lost Communication With ECM/PCM "A" Missing Message	Lost communication with ECM	CAN communication system ECM	EPS warning light: Does not come on	After normal confirmation	-
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	Lost communication with steering sensor	CAN communication system Steering sensor	EPS warning light: Does not come on	After normal confirmation	-
U012987	Lost Communication with Brake System Control Module Missing Message	Lost communication with skid control ECU (brake booster with master cylinder assembly)	CAN communication system Skid control ECU (Brake booster with master cylinder assembly)(for TMC Made HV Model) Skid control ECU (Brake actuator assembly)(for TMMF Made HV Model)	EPS warning light: Does not come on	After normal confirmation	-
U014087	Lost Communication with Body Control Module Missing Message	Lost communication with main body ECU (multiplex network body ECU)	CAN communication system Main body ECU (multiplex network body ECU)	EPS warning light: Does not come on	After normal confirmation	-
U023A87	Lost Communication with Image Processing Module "A" Missing Message	Lost communication with forward recognition camera	CAN communication system Forward recognition camera	EPS warning light: Does not come on	After normal confirmation	w/ Toyota Safety Sense

PROCEDURE

1.	GO TO CAN COMMUNICATION SYSTEM

(a) Go to CAN communication system.

Click here

END

Power Steering Motor "A" Supply Voltage Circuit Voltage Below Threshold (C155A16,C155A17,C155B16,C155B17)

DESCRIPTION If a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop power assist. The ECU must be replaced when there is a problem with the relays because the relays are built into the ECU...

Heavy Steering Feel (EPS Warning Light (Yellow))

PROCEDURE 1. READ VALUE USING GTS (a) Read the Data List according to the display on the GTS. Chassis > EMPS > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Battery Voltage Drop History Number of times vehicle auxiliary battery voltage dropped Min...

Other information:

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Dtc Check / Clear

DTC CHECK / CLEAR NOTICE: When DTC is output, be sure to confirm and record. DTCs may have been stored due to problems unrelated to the steering lock function. Be sure to confirm and record any DTCs output for other systems. When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1...

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Precaution

PRECAUTION PRECAUTIONS WHEN USING GTS (a) When using the GTS with the ignition switch off to troubleshoot: Connect the GTS to the vehicle, and turn a courtesy light switch on and off at 1.5 seconds intervals until communication between the GTS and vehicle begins...