DTC C1426: Stop Light Switch OFF Stuck Malfunction [08/2013 - 12/2013]: Description

The skid control ECU receives stop light switch signals and uses them to determine whether or not the brakes are applied.

The skid control ECU has a detection circuit that it uses to detect a short in the stop light input line, or the ground line of the stop light circuit with the stop light switch on (brake pedal depressed).

If the skid control ECU detects a short in this circuit, it will store this DTC.

DTC No.	DTC Detection Condition	Trouble Area
C1426	Either of the following is detected: With the stop light switch off, the stop light switch is judged to be on based on the master cylinder pressure value for 3 seconds or more. With the stop light switch off, the master cylinder pressure is more than 8 MPa (81.6 kgf/cm² , 1160 psi) for 3 seconds or more.	STOP fuse Stop light switch assembly Stop light switch circuit Ground circuit Skid control ECU (Brake actuator assembly)