Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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2025 Toyota Highlander XLE, FWD

DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message; DTC U1110-87: Lost Communication with Clearance Sonar Module Missing Message [12/2019 - ]: Description

2025 Toyota Highlander XLE, FWDSECTION Description

The meter mirror sub-assembly communicates with each ECU via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0100-87	Lost Communication With ECM/PCM "A" Missing Message	Diagnosis Condition: Ignition switch ON 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
U0129-87	Lost Communication With Brake System Control Module Missing Message	Diagnosis Condition: Ignition switch ON IG power source voltage is 9.5 V or more Malfunction Status (for HV Model): No communication with No. 2 skid control ECU (brake actuator assembly) Malfunction Status (for Gasoline Model): No communication with skid control ECU (brake actuator assembly) Malfunction Time: 3.6 seconds or more	No. 2 skid control ECU (Brake actuator assembly) Skid control ECU (Brake actuator assembly) CAN communication system Meter mirror sub-assembly
U0140-87	Lost Communication with Body Control Module Missing Message	Diagnosis Condition: Ignition switch ON 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
U0155-87	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	Diagnosis Condition: Ignition switch ON 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
U0163-87	Lost Communication with Navigation Control Module Missing Message	Diagnosis Condition: Ignition switch ON IG power source voltage is 9.5 V or more Malfunction Status: No communication with radio receiver assembly Malfunction Time: 5.0 seconds or more	Radio receiver assembly CAN communication system Meter mirror sub-assembly
U0164-87	Lost Communication with HVAC Control Module Missing Message	Diagnosis Condition: Ignition switch ON 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
U023A-87	Lost Communication with Image Processing Module "A" Missing Message	Diagnosis Condition: Ignition switch ON 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
U0293-87	Lost Communication With Hybrid Powertrain Control Module Missing Message	Diagnosis Condition: Ignition switch ON 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 Meter mirror sub-assembly
U1103-87	Lost Communication with Stop and Start Control Module Missing Message	Diagnosis Condition: Ignition switch ON IG power source voltage is 9.5 V or more Malfunction Status: No communication with engine stop and start ECU Malfunction Time: 5.0 seconds or more	Engine stop and start ECU CAN communication system Meter mirror sub-assembly
U1110-87	Lost Communication with Clearance Sonar Module Missing Message	Diagnosis Condition: Ignition switch ON 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

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.