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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 Line for Short to +B [10/2019 - 08/2020] >> Description

Check Bus 3 Line for Short to +B [10/2019 - 08/2020]: Description

There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.

Symptom Trouble Area
There is no resistance between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.
  • Short to +B in CAN main bus line
  • Short to +B in CAN branch line
  • 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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