Flow Control Solenoid

Solenoid Leak Test

NOTE: If the solenoid leaks excessively, the brake fluid level in the modulator reservoir tank will rise when operating the pump motor. Modulator reservoir may overflow.

1. Connect circuit tester l~ range) between the YEL and YEL terminals of the accumulator pressure switch connector.

2. Attach the positive (+) lead of a fully charged 12 V battery to the RED/WHT terminal of the pump motor connector and negative (-) lead to the GRN terminal, and install a switch between as shown.

3. Turn the switch on to allow sufficient pressure to build up within the accumulator and check for continuity with the circuit tester. If the circuit tester shows continuity (pressure switch turned on), run the pump motor for 10 seconds more, then turn the switch off.

- Check if the solenoid hisses or squeaks. Replace the modulator unit if the solenoid hisses or squeaks.

- Check the pressure switch for continuity within 30 minutes. It is normal if there is continuity. If there is no continuity, solenoid is faulty and the modulator unit must be replaced.