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Home >> Lexus >> 2021 >> ES 350 Luxury >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Except Hybrid) - Circuit Tests (3 Of 4) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Check Bus 3 Lines for Short Circuit [10/2019 - 08/2020] >> Description

Check Bus 3 Lines for Short Circuit [10/2019 - 08/2020]: Description

There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is below 54 Ω.

Symptom Trouble Area
Resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
  • Short in CAN main bus lines
  • Short in CAN branch lines
  • Central gateway ECU (network gateway ECU)
  • DCM (telematics transceiver)

    (w/ Telematics Transceiver)

  • Radio receiver assembly
  • Stereo component equalizer assembly

    (w/ Active Noise Control System)

  • Option connector (bus buffer ECU)

    (w/ CAN Compatible Optional Devices)

  • No. 4 CAN junction connector
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