DTC C1380/64 Stop Light Control Relay Malfunction: Description

The skid control ECU inputs the stop light switch signal and detects the status of the brake operation.

DTC DETECTING CONDITIONS AND TROUBLE AREAS REFERENCE

DTC No.	DTC Detecting Conditions	Trouble Areas
C1380/64	Either of following conditions met when IG1 terminal voltage between 10 V and 14 V: Despite STPO (stop light driving output) being on, no signal input to STP terminal for 5 seconds or more Despite STPO being off, input signals of STP and STP2 do not match	Stop light switch assembly Stop light switch circuit STOP LP CTRL relay Master cylinder solenoid (skid control ECU)