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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Lin Communication System - Diagnostic Codes >> Lin Communication System >> DTC B1206: P/W Master Switch Communication Stop; DTC B1273: Sliding Roof ECU Communication Stop; DTC B2321: D-Door Motor ECU Communication Stop; DTC B2322: P-Door Motor ECU Communication Stop; DTC B2323: RR-Door Motor ECU Communication Stop; DTC B2324: RL-Door Motor ECU Communication Stop; DTC B2329: Lost Communication with Sliding Sunshade ECU [12/2019 - 11/2023] >> Description

DTC B1206: P/W Master Switch Communication Stop; DTC B1273: Sliding Roof ECU Communication Stop; DTC B2321: D-Door Motor ECU Communication Stop; DTC B2322: P-Door Motor ECU Communication Stop; DTC B2323: RR-Door Motor ECU Communication Stop; DTC B2324: RL-Door Motor ECU Communication Stop; DTC B2329: Lost Communication with Sliding Sunshade ECU [12/2019 - 11/2023]: Description

This DTC is stored when LIN communication between the main body ECU (multiplex network body ECU) and multiplex network master switch assembly, power window regulator motor assembly (driver door), power window regulator motor assembly (front passenger door), power window regulator motor assembly (rear RH door), power window regulator motor assembly (rear LH door), sliding roof ECU (sliding roof drive gear assembly)*1*2 or roof sunshade ECU (sliding roof drive gear assembly)*2 stops for 10 seconds or more.

  1. *1: w/ Sliding Roof System
  2. *2: w/ Panoramic Moon Roof System
DTC No. Detection Item DTC Detection Condition Trouble Area
B1206 P/W Master Switch Communication Stop No communication between multiplex network master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Multiplex network master switch assembly
  • Wire harness or connector
  • ECU-B NO. 2 fuse
B1273 Sliding Roof ECU Communication Stop No communication between sliding roof ECU (sliding roof drive gear assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more.*1*2
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Sliding roof ECU (sliding roof drive gear assembly)
  • Wire harness or connector
  • S/ROOF fuse
B2321 D-Door Motor ECU Communication Stop No communication between power window regulator motor assembly (driver door) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Multiplex network master switch assembly
  • Power window regulator motor assembly (driver door)
  • Wire harness or connector
  • DOOR F/L fuse
B2322 P-Door Motor ECU Communication Stop No communication between power window regulator motor assembly (front passenger door) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Power window regulator motor assembly (front passenger door)
  • Wire harness or connector
  • DOOR F/R fuse
B2323 RR-Door Motor ECU Communication Stop No communication between power window regulator motor assembly (rear RH door) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Power window regulator motor assembly (rear RH door)
  • Wire harness or connector
  • DOOR R/R fuse
B2324 RL-Door Motor ECU Communication Stop No communication between power window regulator motor assembly (rear LH door) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Power window regulator motor assembly (rear LH door)
  • Wire harness or connector
  • DOOR R/L fuse
B2329 Lost Communication with Sliding Sunshade ECU No communication between roof sunshade ECU (sliding roof drive gear assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more.*2
  • Roof sunshade ECU (sliding roof drive gear assembly)
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Wire harness or connector
  • SHADE fuse
  1. *1: w/ Sliding Roof System
  2. *2: w/ Panoramic Moon Roof System
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