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

Toyota Corolla Cross (2022-2025) Service Manual / Suspension / Tire Pressure Monitoring / Tire Pressure Warning System / Lost Communication with Brake System Control Module "A" Missing Message (U012987)

DESCRIPTION

The tire pressure warning ECU and receiver receives signals from the skid control ECU (brake actuator assembly) via the CAN communication system.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U012987	Lost Communication with Brake System Control Module "A" Missing Message	Lost communication with skid control ECU (brake actuator assembly)	CAN communication system Skid control ECU (brake actuator assembly)

PROCEDURE

1.	CHECK FOR DTC

(a) Check for DTCs.

Chassis > Tire Pressure Monitor > Trouble Codes

Result	Proceed to
U012987 is output	A
DTCs are not output	B

GO TO CAN COMMUNICATION SYSTEM

for Gasoline Model: Click here
for HEV Model: Click here

USE SIMULATION METHOD TO CHECK

SEE MORE:

Vehicle Behavior Chart

VEHICLE BEHAVIOR CHART VEHICLE BEHAVIOR CHART (a) Vehicle behavior categorized by DTC If a DTC is output, the vehicle behaves as follows. DTC No. Detection Item Vehicle Behavior when DTC is Output P033506 Crankshaft Position Sensor "A" Algorithm Based Failure Norm

Installation

INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION) Procedure Part Name Code 1 REAR STABILIZER BAR BUSH 48818 - - 2 REAR NO. 1 STABILI

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

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Tire Pressure Warning Reset Switch Circuit

Tire Pressure Warning Light Circuit

Tire Position Not Identified

SEE MORE:

Vehicle Behavior Chart

Installation