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Home >> Lexus >> 2018 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Diagnostics - Circuit Tests) (2 Of 2) >> Can Communication System >> Check Bus 3 Line for Short to +B [12/2017 - 08/2019] >> Description

Check Bus 3 Line for Short to +B [12/2017 - 08/2019]: Description

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

Symptom Trouble Area
No resistance exists between terminal 6 (CA3H) of the network gateway ECU and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the network gateway ECU and terminal 16 (BAT) of the DLC3.
  • Short in CAN main bus line
  • Short in CAN branch line
  • Telematics transceiver (w/ Manual (SOS) Switch)
  • Radio receiver assembly
  • Network gateway ECU
  • No. 6 CAN junction connector