Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Lost Communication With ECM/PCM "A" Missing Message (U010087,...,U113387)

U010087

Lost Communication With ECM/PCM "A" Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with ECM

Malfunction Time:

• 3.6 seconds or more

• ECM
• CAN communication system
• Combination meter assembly

DTC stored

-

U012987

Lost Communication with Brake System Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with skid control ECU (brake booster with master cylinder assembly)

Malfunction Time:

• 1.0 second or more

• Skid control ECU (brake booster with master cylinder assembly)
• CAN communication system
• Combination meter assembly

DTC stored

-

U013187

Lost Communication with Power Steering Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with power steering ECU (rack and pinion power steering gear assembly)

Malfunction Time:

• 3.6 seconds or more

• Power steering ECU (Rack and pinion power steering gear assembly)
• CAN communication system
• Combination meter assembly

DTC stored

-

U014287

Lost Communication with Body Control Module "B" Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with main body ECU (multiplex network body ECU)

Malfunction Time:

• 5.0 seconds or more

• Main body ECU (Multiplex network body ECU)
• CAN communication system
• Combination meter assembly

DTC stored

-

U015187

Lost Communication with Restraints Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with airbag ECU assembly

Malfunction Time:

• 5.0 seconds or more

• Airbag ECU assembly
• CAN communication system
• Combination meter assembly

DTC stored

-

U016387

Lost Communication with Navigation Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with radio and display receiver assembly

Malfunction Time:

• 5.0 seconds or more

• Radio and display receiver assembly
• CAN communication system
• Combination meter assembly

DTC stored

-

U016487

Lost Communication with HVAC Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with air conditioning amplifier assembly

Malfunction Time:

• 5.0 seconds or more

• Air conditioning amplifier assembly
• CAN communication system
• Combination meter assembly

DTC stored

-

U018287

Lost Communication with Lighting Control Module Front Missing Message

Diagnosis Condition:

• The power switch is ON
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with headlight ECU sub-assembly LH

Malfunction Time:

• 5.0 seconds or more

• Headlight ECU sub-assembly LH
• CAN communication system
• Combination meter assembly

DTC stored

w/ Cornering Light

U023387

Lost Communication with Side Obstacle Detection Control Module Right Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with blind spot monitor sensor RH

Malfunction Time:

• 5.0 seconds or more

• Blind spot monitor sensor RH
• CAN communication system
• Combination meter assembly

DTC stored

-

U023A87

Lost Communication with Image Processing Module "A" Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with forward recognition camera

Malfunction Time:

• 5.0 seconds or more

• Forward recognition camera
• CAN communication system
• Combination meter assembly

DTC stored

-

U029387

Lost Communication With Hybrid Powertrain Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with hybrid vehicle control ECU

Malfunction Time:

• 3.6 seconds or more

• Hybrid vehicle control ECU
• CAN communication system
• Combination meter assembly

DTC stored

-

U032787

Software Incompatibility with Vehicle Security Control Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with certification ECU (smart key ECU assembly)

Malfunction Time:

• 5.0 seconds or more

• Certification ECU (Smart key ECU assembly)
• CAN communication system
• Combination meter assembly

DTC stored

-

U110487

Lost Communication with Driving Support ECU Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with driving support ECU assembly

Malfunction Time:

• 5.0 seconds or more

• Driving support ECU assembly
• CAN communication system
• Combination meter assembly

DTC stored

-

U110687

Lost Communication with Electric Parking Brake Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with parking brake ECU (brake actuator assembly)

Malfunction Time:

• 3.6 seconds or more

• Parking brake ECU (Brake actuator assembly)
• CAN communication system
• Combination meter assembly

DTC stored

-

U111087

Lost Communication with Intuitive Parking Assist Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with clearance warning ECU assembly

Malfunction Time:

• 5.0 seconds or more

• Clearance warning ECU assembly
• CAN communication system
• Combination meter assembly

DTC stored

w/ Intelligent Clearance Sonar System

U111287

Lost Communication with Combination Switch Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with steering sensor

Malfunction Time:

• 10.0 seconds or more

• Steering sensor
• CAN communication system
• Combination meter assembly

DTC stored

-

U111787

Lost Communication with Accessory Gateway Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with option connector (bus buffer ECU)

Malfunction Time:

• 5.0 seconds or more

• Option connector (Bus buffer ECU)
• CAN communication system
• Combination meter assembly

DTC stored

-

U113387

Lost Communication with PMN Module Missing Message

Diagnosis Condition:

• The power switch is on (IG)
• IG power source voltage is 9.5 V or more

Malfunction Status:

• No communication with certification ECU (smart key ECU assembly)

Malfunction Time:

• 3.6 seconds or more

• Certification ECU (Smart key ECU assembly)
• CAN communication system
• Combination meter assembly

DTC stored

-

1.

CHECK FOR DTC (METER / GAUGE SYSTEM)

GO TO CAN COMMUNICATION SYSTEM