DTC C13A1/12: Short in Power Supply Relay Circuit: Description

The electric parking brake ECU performs the lock/release operation of the parking brake based on signals from the electric parking brake switch, or instruction signals from other systems via CAN communication.

DTC Code	Detection Condition	Trouble Area
C13A1/12	Both of following conditions are met: Electric parking brake ECU is ON (engine switch is on (IG), or 15 sec. after engine switch is off and electric parking brake switch lock control is operating) Electric parking brake ECU's power source relay is shorted for approx. 60 sec.	Electric parking brake ECU Wire harness or connector Electric parking brake switch