DTC C1380-64: Stop Light Control Relay Malfunction [11/2016 - ]: Description

Upon receiving the pre-collision system or dynamic radar cruise control system operating signal from the skid control ECU assembly, the stop light control relay contact turns on and the stop lights come on.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	Note
C1380-64	Stop Light Control Relay Malfunction	391 392	INF Code: 391 When the voltage at the +BI1 and +BI2 terminals is 8.9 V or more, stop light drive output (STPO) is ON and STP2 is OFF for 2 seconds or more. INF Code: 392 When the voltage at the +BI1 and +BI2 terminals is 8.9 V or more, stop light drive output (STPO) is OFF and the input signals for STP and STP2 differ for 2 seconds or more.	Stop light switch assembly circuit Skid control ECU assembly	VSC DTC

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1380-64

Stop Light Control Relay Malfunction

391
392

INF Code: 391
- When the voltage at the +BI1 and +BI2 terminals is 8.9 V or more, stop light drive output (STPO) is ON and STP2 is OFF for 2 seconds or more.

INF Code: 392
- When the voltage at the +BI1 and +BI2 terminals is 8.9 V or more, stop light drive output (STPO) is OFF and the input signals for STP and STP2 differ for 2 seconds or more.

Stop light switch assembly circuit
Skid control ECU assembly

VSC DTC