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Home >> Lexus >> 2017 >> ES 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/ Central Gateway Ecu) (Diagnostics & Symptom Tests) >> CAN COMMUNICATION SYSTEM(w/ Central Gateway ECU) >> Open in Bus 1 Main Bus Line [07/2015 - ] >> Description

Open in Bus 1 Main Bus Line [07/2015 - ]: Description

There may be an open circuit in one of the bus 1 main lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU is 70 Ω or higher.

Symptom Trouble Area
Resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU is 70 Ω or higher.
  • Bus 1 main lines or connector
  • Central gateway ECU
  • Hybrid vehicle control ECU assembly
  • CAN No. 4 junction connector
  • CAN No. 5 junction connector

This malfunction is not related to the lines of a bus 1 branch or to ECUs or sensors connected to a bus 1 branch.