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Home >> Toyota >> 2021 >> Highlander LE, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/ AFS) - Diagnostic Codes (2 Of 2), Symptom Tests & Circuit Tests >> LIGHTING SYSTEM (w/ AFS) >> DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" 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 U0242-87: Lost Communication with Headlamp Control Module "B" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [11/2023 - ] >> Description
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DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" 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 U0242-87: Lost Communication with Headlamp Control Module "B" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [11/2023 - ]: Description

These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly LH and other ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U0100-87 Lost Communication With ECM/PCM "A" Missing Message The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more. CAN communication system Headlight Control
U0101-87 Lost Communication with TCM Missing Message for HV Model: 
  1. The headlight ECU sub-assembly LH does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.

for Gasoline Model: 

  1. The headlight ECU sub-assembly LH does not receive data from the TCM for approximately 10 seconds or more.
 CAN communication system Headlight Control
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message The headlight ECU sub-assembly LH does not receive data from the steering sensor for approximately 10 seconds or more. CAN communication system Headlight Control
U0129-87 Lost Communication with Brake System Control Module "A" Missing Message for HV Model: 
  1. The headlight ECU sub-assembly LH does not receive data from the No. 2 skid control ECU (brake actuator assembly) for approximately 10 seconds or more.

for Gasoline Model: 

  1. The headlight ECU sub-assembly LH does not receive data from the skid control ECU (brake actuator assembly) for approximately 10 seconds or more.
 CAN communication system Headlight Control
U0140-87 Lost Communication with Body Control Module Missing Message The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. CAN communication system Headlight Control
U0155-87 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for approximately 10 seconds or more. CAN communication system Headlight Control
U0242-87 Lost Communication with Headlamp Control Module "B" Missing Message The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more. CAN communication system Headlight Control
U0293-87 Lost Communication with Hybrid/EV Powertrain Control Module Missing Message The headlight ECU sub-assembly LH does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more. CAN communication system Headlight Control
U114F-87 Lost Communication with Power Integration Module Missing Message The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. CAN communication system Headlight Control
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