Toyota Corolla Cross: Lost Communication With ECM/PCM "A" Missing Message (U010087,...,U111787)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Start Function, Hev Model) / Lost Communication With ECM/PCM "A" Missing Message (U010087,...,U111787)

DESCRIPTION

These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly) and ECM, skid control ECU (brake actuator assembly), main body ECU (multiplex network body ECU), combination meter assembly, radio and display receiver assembly, hybrid vehicle control ECU or clearance warning ECU assembly, and data from the option connector (bus buffer ECU) cannot be received.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U010087	Lost Communication With ECM/PCM "A" Missing Message	CAN communication malfunction between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*)	ECM	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U012987	Lost Communication with Brake System Control Module "A" Missing Message	CAN communication error between certification ECU (smart key ECU assembly) and skid control ECU (brake actuator assembly) (1-trip detection logic*)	Skid control ECU (brake actuator assembly)	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U014087	Lost Communication with Body Control Module Missing Message	CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*)	Main body ECU (multiplex network body ECU)	DTC Output Confirmation Operation: Always
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module	CAN communication malfunction between certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*)	Combination meter assembly	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U016387	Lost Communication with Navigation Control Module Missing Message	CAN communication malfunction between certification ECU (smart key ECU assembly) and radio and display receiver assembly (1-trip detection logic*)	Radio and display receiver assembly	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U029387	Lost Communication with Hybrid/EV Powertrain Control Module Missing Message	CAN communication error between certification ECU (smart key ECU assembly) and hybrid vehicle control ECU (1-trip detection logic*)	Hybrid vehicle control ECU	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U111087	Lost Communication with Intuitive Parking Assist Module Missing Message	CAN communication error between certification ECU (smart key ECU assembly) and clearance warning ECU assembly (1-trip detection logic*)	Clearance warning ECU assembly	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U111787	Lost Communication with Accessory Gateway Missing Message	CAN communication malfunction between the certification ECU (smart key ECU assembly) and the option connector (bus buffer ECU) for approximately 10 seconds or more.	Option connector (bus buffer ECU)	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.

*: Only detected while a malfunction is present.

Vehicle Condition and Fail-safe Function when Malfunction Detected

DTC Code	Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
U010087	There is no effect on vehicle behavior.	-
U012987	There is no effect on vehicle behavior.	-
U014087	Doors cannot be locked or unlocked. The warning (wireless buzzer) does not sound.	-
U015587	The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display.	-
U016387	There is no effect on vehicle behavior.	-
U029387	The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display.	-
U111087	There is no effect on vehicle behavior.	-
U111787	The hybrid control system cannot be started using the wireless remote control function.	-

Related Data List and Active Test Items

DTC No.	Data List and Active Test
U010087 U012987 U014087 U015587 U016387 U029387 U111087 U111787	-

DTC No.

Data List and Active Test

U010087

U012987

U014087

U015587

U016387

U029387

U111087

U111787

CAUTION / NOTICE / HINT

NOTICE:

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 1.5 seconds or less until communication between the GTS and the vehicle begins.
Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT:

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE

1.	CHECK FOR DTC

(a) Check for DTCs and note any DTCs that are output.

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

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Removal

REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL) Procedure Part Name Code 1 RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM - - - 2 FAN AND GENERATOR V BELT 16361A - - - 3 NO. 1 ENGINE UNDER COVER ASS

Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range (P01052A)

DESCRIPTION Refer to DTC P010511. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P01052A Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range Intake manifold pressure measured after engine start drops

Toyota Corolla Cross: Lost Communication With ECM/PCM "A" Missing Message (U010087,...,U111787)

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Power Source Mode does not Change to ON (IG and ACC)

Power Source Mode does not Change to ON (IG)

Power Source Mode does not Change to ON (ACC)

SEE MORE:

Removal

Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range (P01052A)