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Home >> Lexus >> 2012 >> IS F >> 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 >> Description

DTC B1573: Short in Telephone Antenna Circuit; DTC B15CB: Telematics Transceiver Antenna Disconnected: Description

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

DTC No. DTC Detection Condition Trouble Area
B1573 Telephone and GPS antenna assembly impedance is lower than malfunction criterion for 10 seconds when engine switch is on (IG).
(Short circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna assembly
  • Wire harness or connector (Telephone and GPS antenna cord)
B15CB Telephone and GPS antenna assembly impedance is higher than malfunction criterion for 10 seconds when engine switch is on (IG).
(Open circuit)

HINT: 

Refer to "PARTS LOCATION" for the installation location of telephone and GPS antenna cord. Refer to PARTS LOCATION .