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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 (2 Of 4) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Check Bus 1 Line for Short to +B [08/2021 - 09/2022] >> Description

Check Bus 1 Line for Short to +B [08/2021 - 09/2022]: Description

There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 23 (CA1H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 8 (CA1L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.

Symptom Trouble Area
There is no resistance between terminal 23 (CA1H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 8 (CA1L) 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)
  • Forward recognition camera
  • Clearance warning ECU assembly

    (w/ Parking Support Brake System)

  • Parking assist ECU

    (w/ Panoramic View Monitor System)

  • Millimeter wave radar sensor assembly
  • Blind spot monitor sensor RH

    (w/ Blind Spot Monitor System)

  • Rear television camera assembly
  • No. 1 CAN junction connector
  • No. 6 CAN junction connector
  • No. 1 CAN junction terminal
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