SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2025HIGHLANDER XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSPOWER BACK DOOR SYSTEM - DIAGNOSTIC CODES & SYMPTOM TESTSPOWER BACK DOOR SYSTEMDTC U0101: LOST COMMUNICATION WITH TCM; DTC U0122: LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE; DTC U0142: LOST COMMUNICATION WITH BODY CONTROL MODULE "B"; DTC U0155: LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE; DTC U0327: LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE [12/2019 - 11/2023]DESCRIPTION
2025 Toyota Highlander XLE, FWD

DTC U0101: Lost Communication With TCM; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0327: Lost Communication with Vehicle Security Control Module [12/2019 - 11/2023]: Description

2025 Toyota Highlander XLE, FWDSECTION Description

These DTCs are stored when a malfunction occurs in the CAN communication system.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0101 Lost Communication With TCM Communication malfunction detected between multiplex network door ECU and ECM
  • CAN communication system
  • ECM
  • Multiplex network door ECU
U0122 Lost Communication With Vehicle Dynamics Control Module Communication malfunction detected between multiplex network door ECU and skid control ECU (no. 1 brake actuator assembly)
  • CAN communication system
  • Skid control ECU (No. 1 brake actuator assembly)
  • Multiplex network door ECU
U0142 Lost Communication with Body Control Module "B" Communication malfunction detected between multiplex network door ECU and main body ECU (multiplex network body ECU)
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Multiplex network door ECU
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module Communication malfunction detected between multiplex network door ECU and combination meter assembly
  • CAN communication system
  • Combination meter assembly
  • Multiplex network door ECU
U0327 Lost Communication with Vehicle Security Control Module Communication malfunction detected between multiplex network door ECU and certification ECU (smart key ECU assembly)
  • CAN communication system
  • Certification ECU (smart key ECU assembly)
  • Multiplex network door ECU
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.