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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Safety Connect System - Diagnostic Codes & Symptom Tests >> Safety Connect System >> DTC B1570-11: Indicator (Red) Circuit Short to Ground; DTC B1570-13: Indicator (Red) Circuit Open [09/2020 - ] >> Description

DTC B1570-11: Indicator (Red) Circuit Short to Ground; DTC B1570-13: Indicator (Red) Circuit Open [09/2020 - ]: Description

This DTC is stored when the DCM (telematics transceiver) detects an open or short in the manual (SOS) switch red indicator circuit of the manual (SOS) switch.

The manual (SOS) switch red indicator illuminates for 2 seconds and goes off when the engine switch is turned on (IG). If a malfunction in the safety connect system is detected, the manual (SOS) switch red indicator will illuminate.

However, the manual (SOS) switch red indicator may not illuminate when this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1570-11 Indicator (Red) Circuit Short to Ground Manual (SOS) switch red indicator impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)
  • DCM (telematics transceiver)
  • Map light sub-assembly (manual (SOS) switch)
  • Harness or connector
B1570-13 Indicator (Red) Circuit Open Manual (SOS) switch red indicator impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)
  • DCM (telematics transceiver)
  • Map light sub-assembly (manual (SOS) switch)
  • Harness or connector