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Home >> Lexus >> 2021 >> LS 500 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Safety Connect System - Diagnostic Codes & Symptom Tests >> Safety Connect System >> DTC B1573: Short in Telephone Antenna Circuit; DTC B15CB: Telematics Transceiver Antenna Disconnected [12/2017 - 10/2020] >> Description

DTC B1573: Short in Telephone Antenna Circuit; DTC B15CB: Telematics Transceiver Antenna Disconnected [12/2017 - 10/2020]: Description

This DTC is stored when the DCM (Telematics Transceiver) detects an open or a short in the telephone antenna (main) circuit. The DCM (Telematics Transceiver) sends and receives 777 - 756 MHz, 824 - 894 MHz, 1850 - 1990 MHz or 1710 - 2155 MHz radio-frequency through the telephone antenna (main).

DTC No. Detection Item DTC Detection Condition Trouble Area
B1573 Short in Telephone Antenna Circuit Telephone antenna (main) impedance is lower than malfunction criterion for 10 seconds when engine switch is on (IG).
(Short circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna (for Roof Side)
  • Telephone and GPS antenna cord (antenna cord sub-assembly [Floor])
  • Harness or Connector
B15CB Telematics Transceiver Antenna Disconnected Telephone antenna (main) impedance is higher than malfunction criterion for 10 seconds when engine switch is on (IG).
(Open circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna (for Roof Side)
  • Telephone and GPS antenna cord (antenna cord sub-assembly [Floor])
  • Harness or Connector