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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 GND [12/2017 - 08/2019] >> Description

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

There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 6 (CA3H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the network gateway ECU and terminal 4 (CG) of the DLC3.

Symptom Trouble Area
No resistance exists between terminal 6 (CA3H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the network gateway ECU and terminal 4 (CG) 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
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