Toyota Corolla Cross: Lost Communication with Brake System Control Module "A" Missing Message (U012987,U023A87)

U012987

Lost Communication with Brake System Control Module "A" Missing Message

Communication stop occurs between the airbag ECU assembly and Skid control ECU (brake actuator assembly) continuously for approximately 2 second or more.

• CAN communication system
• Skid control ECU (brake actuator assembly)
• Airbag ECU assembly

Comes on

Does not apply to test/check mode

U023A87

Lost Communication with Image Processing Module "A" Missing Message

Communication stop occurs between the airbag ECU assembly and forward recognition camera continuously for approximately 10 second or more.

• CAN communication system
• Forward recognition camera
• Airbag ECU assembly

Comes on

Does not apply to test/check mode

1.

CHECK DTC OUTPUT

U012987 or U023A87 is output

A

DTCs are not output

B

None of the above conditions are met

C

GO TO CAN COMMUNICATION SYSTEM

for HEV Model: Click here

for Gasoline Model: Click here

USE SIMULATION METHOD TO CHECK

GO TO DIAGNOSTIC TROUBLE CODE CHART