ES 250 V6-2.5L (2VZ-FE) (1991)
SOLENOID VALVE RELAY
The solenoid relay has two purposes. When energized, the solenoid relay provides power to the solenoid valves for ABS operation. However, the
solenoid valves do not use this power unless the ABS computer completes the circuit to ground. When the solenoid is not energized, it provides a ground
path for the antilock warning lamp circuit. Thus, the antilock warning lamp will light when the solenoid relay loses either power or ground.
PUMP MOTOR RELAY
When energized, the pump motor relay provides power to the brake fluid return pump. This action results in the transfer of brake fluid from the
accumulator chambers to the master cylinder reservoir. When the pump motor circuit is energized, a PUMP ON reference voltage is sent to the ABS
computer.