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Home >> Lexus >> 2020 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Safety Connect System (Diagnostic Codes & Symptom Tests) >> Safety Connect System >> DTC B1571: Manual (SOS) Switch Green Indicator Malfunction [12/2017 - 08/2019] >> Description

DTC B1571: Manual (SOS) Switch Green Indicator Malfunction [12/2017 - 08/2019]: Description

This DTC is set when the DCM (Telematics Transceiver) detects an open or short in the manual (SOS) switch green indicator circuit of the manual (SOS) switch. The manual (SOS) switch green indicator illuminates after the power switch is turned on (IG).

If the safety connect system is not active, the manual (SOS) switch green indicator will turn off.

If the safety connect system is active, the manual (SOS) switch green indicator will blink while communicating with the call center.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1571 Manual (SOS) Switch Green Indicator Malfunction Current for manual (SOS) switch green indicator reaches malfunction criteria for 10 seconds when power switch is on (IG).
  • Map light assembly
  • Wire harness or connector
  • DCM (Telematics Transceiver)