Circuit Operation
- The ABS/TCL-ECU contains the power supply circuit (terminal 1) for the pump motor. The pump motor is energized by the motor relay, which is integrated in the ABS/TCL-ECU.
- The motor relay, which is integrated in the ABS/TCL-ECU, is always off unless the motor solenoid valve check is activated when the vehicle is started.
- The ABS/TCL-ECU activates the pump motor by turning on the ECU built-in motor relay when the ABS is working.