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Home >> Toyota >> 2021 >> Avalon TRD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes & Circuit Tests (Except Hybrid) (1 Of 2) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Circuit Tests >> Open in Bus 1 Main Bus Line [04/2018 -] >> Description

Open in Bus 1 Main Bus Line [04/2018 -]: Description

There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.

Symptom Trouble Area
Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
  • CAN main bus lines or connector
  • Central gateway ECU (network gateway ECU)
  • No. 1 CAN junction connector
  • No. 7 CAN junction connector

This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.