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Home >> Lexus >> 2021 >> ES 350 Luxury >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Safety Connect System (Except Hybrid) - Diagnostic Codes & Symptom Tests >> SAFETY CONNECT SYSTEM (for Gasoline Model) >> DTC B15C5-11: Emergency Call Switch Circuit Short to Ground; DTC B15C5-13: Emergency Call Switch Circuit Open [10/2019 - ] >> Description

DTC B15C5-11: Emergency Call Switch Circuit Short to Ground; DTC B15C5-13: Emergency Call Switch Circuit Open [10/2019 - ]: Description

If the DCM (telematics transceiver) detects an error in the communication between the DCM (telematics transceiver) and the map light sub-assembly (manual (SOS) switch) as a result of the DCM (telematics transceiver) self check, this DTC will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15C5-11 Emergency Call Switch Circuit Short to Ground Manual (SOS) switch impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)
  • Map light sub-assembly (manual (SOS) switch)
  • Harness or connector
  • DCM (telematics transceiver)
B15C5-13 Emergency Call Switch Circuit Open Manual (SOS) switch impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)
  • Map light sub-assembly (manual (SOS) switch)
  • Harness or connector
  • DCM (telematics transceiver)