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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 4 Line for Short to GND [08/2019 - ] >> Description

Check Bus 4 Line for Short to GND [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 22 (CA2H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 7 (CA2L) of the network gateway ECU and terminal 4 (CG) of the DLC3.

Symptom Trouble Area
No resistance exists between terminal 22 (CA2H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 7 (CA2L) of the network gateway ECU and terminal 4 (CG) of the DLC3.
  • Short in CAN main bus line
  • Short in CAN branch line
  • Network gateway ECU
  • Skid control ECU assembly
  • ECM assembly
  • Tire pressure warning ECU and receiver
  • Absorber control ECU (w/ AVS)
  • Parking brake ECU assembly
  • Power steering ECU assembly
  • Steering sensor
  • Yaw rate sensor assembly
  • Airbag sensor assembly
  • Hybrid vehicle control ECU assembly
  • Occupant detection ECU
  • No. 1 CAN junction connector
  • No. 7 CAN junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 12 CAN junction connector