PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): U012587,U012687,U012987,U029387; Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; 2020 - 2022 MY Corolla Corolla HV [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001G4E3
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 09/2022]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): U012587,U012687,U012987,U029387; Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

U012587

Lost Communication with Multi-axis Acceleration Sensor Module Missing Message

DTC

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

DTC

U012987

Lost Communication with Brake System Control Module Missing Message

DTC

U029387

Lost Communication with Hybrid Powertrain Control Module Missing Message

DESCRIPTION

When a malfunction is detected between various ECUs and sensors, these DTCs are stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	While the vehicle is being driven at 5 km/h (4 mph) or more, a communication error between the yaw rate sensor (airbag sensor assembly) and the forward recognition camera is detected for approximately 4 seconds or more.	CAN communication system
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	3 seconds or more after the power switch is turned on (IG), a communication error between the steering sensor and the forward recognition camera is detected for approximately 1 second or more.	CAN communication system
U012987	Lost Communication with Brake System Control Module Missing Message	3 seconds or more after the power switch is turned on (IG), a communication error between the skid control ECU (brake booster with master cylinder assembly) and the forward recognition camera is detected for approximately 1 second or more.	CAN communication system
U029387	Lost Communication with Hybrid Powertrain Control Module Missing Message	While the vehicle is being driven at 5 km/h (4 mph) or more, a communication error between the hybrid vehicle control ECU and the forward recognition camera is detected for approximately 6 seconds or more.	CAN communication system

1.	CHECK FOR DTCs

(a) Clear the DTCs.

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

Result	Proceed to
DTC U012587, U012687, U012987 and U029387 are not output	A
DTC U012587, U012687, U012987 or U029387 is output	B