DTC C1380: Stop Light Control Relay Malfunction [08/2019 - 08/2020]: Description

WARNING: This page is about a different variant/trim than selected.

When any of the following conditions are met, the skid control ECU (brake booster with master cylinder assembly) sets the drive output (STPO) ON which operates the stop light control relay (stop light switch assembly) and turns on the stop lights.

Illumination Conditions:

Pre-collision brake is operating.
The dynamic radar cruise control system is operating and is applying the brakes.
Secondary collision brake is operating.
Brake hold is operating.
The parking brake is engaged while the vehicle is being driven.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	MIL	Note
C1380	Stop Light Control Relay Malfunction	761 762	INF Code: 761 When terminal IG1 voltage is 9.5 V or more, stop light drive output (STPO) is on and STP2 is off for 2 seconds or more. INF Code: 762 When terminal IG1 voltage is 9.5 V or more, stop light drive output (STPO) is off and the input signals for STP and STP2 differ for 5 seconds or more.	Wire harness or connector Stop light switch assembly Skid control ECU (brake booster with master cylinder assembly) Rear combination light assembly LH Rear combination light assembly RH Rear light assembly LH* Rear light assembly RH* Center stop light set Hybrid vehicle control ECU Certification ECU (smart key ECU assembly) Vehicle approaching speaker controller	Does not come on	VSC DTC

*: w/ Cornering Light