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Home >> Lexus >> 2018 >> RX 450h Base >> 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 - 03/2018] >> Description

DTC B1573: Short in Telephone Antenna Circuit; DTC B15CB: Telematics Transceiver Antenna Disconnected [12/2017 - 03/2018]: Description

This DTC is set when the DCM (Telematics Transceiver) detects an open or a short in the telephone and GPS antenna assembly (for Roof Side)circuit. The DCM (Telematics Transceiver) oscillates and receives 756 - 777 MHz, 824 - 894 MHz, 1850 - 1990 MHz or 1710 - 2155 MHz radio-frequency through the telephone and GPS antenna assembly (for Roof Side).

DTC No. Detection Item DTC Detection Condition Trouble Area
B1573 Short in Telephone Antenna Circuit Telephone and GPS antenna assembly (for Roof Side) impedance is lower than malfunction criterion for 10 seconds when power switch is on (IG).
(Short circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna assembly (for Roof Side)
  • Telephone and GPS antenna cord (No. 6 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (antenna cord sub-assembly)
B15CB Telematics Transceiver Antenna Disconnected Telephone and GPS antenna assembly (for Roof Side) impedance is higher than malfunction criterion for 10 seconds when power switch is on (IG).
(Open circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna assembly (for Roof Side)
  • Telephone and GPS antenna cord (No. 6 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (antenna cord sub-assembly)