Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014287,U015587,U016387,U016487,U023A87,U029387,U110487,U111087)

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
• Meter mirror sub-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:

• 3.6 seconds or more

• Skid control ECU (Brake booster with master cylinder assembly)
• CAN communication system
• Meter mirror sub-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
• Meter mirror sub-assembly

DTC stored

-

U015587

Lost Communication with Instrument Panel Cluster (IPC) 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 combination meter assembly

Malfunction Time:

• 5.0 seconds or more

• Combination meter assembly
• CAN communication system
• Meter mirror sub-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
• Meter mirror sub-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
• Meter mirror sub-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
• Meter mirror sub-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 assembly

Malfunction Time:

• 3.6 seconds or more

• Hybrid vehicle control ECU assembly
• CAN communication system
• Meter mirror sub-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
• Meter mirror sub-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
• Meter mirror sub-assembly

DTC stored

w/ Intelligent Clearance Sonar System

1.

CHECK FOR DTC (HEADUP DISPLAY SYSTEM)

GO TO CAN COMMUNICATION SYSTEM