Modulator function check

MODULATOR FUNCTION CHECK

This check determines whether the basic brake system continues to operate normally when the modulator unit fluid pressure is low.

CAUTION: This check is made by relieving the high – pressure fluid in the modulator unit and checking for brake operation. After inspection, be sure to top – up brake fluid to MAX line on reservoir and start engine to restore ABS system.

Do not spill brake fluid it may damage painted surfaces, wash it off immediately with water.

Do not reuse drained brake fluid.

DO NOT loosen the relief plug on the accumulator.

Check

1. A Modulator unit
2. B Bleed screw
3. C Bleed screw cap
4. D Reservoir filler cap
5. Remove bleeder cap and place ring spanner over bleed screw.
6. Connect bleed tube to the bleed screw.
7. While holding bleed tube in container, slowly loosen bleed screw 1/4 turn and collect brake fluid in container.

CAUTION: Do not over loosen bleed screw, release high pressure fluid gradually.

4. When brake fluid stops flowing, loosen bleed screw more to release pressure completely.
5. Tighten bleed screw to specified torque.
6. Raise front of vehicle.

WARNING: Support on safety stands.

7. Use assistance: Depress brake pedal firmly and check that front wheels cannot be rotated.
8. Remove stand(s) and lower vehicle.
9. Remove filler cap and refill reservoir to MAX level with DOT 4 brake fluid.

Note: Pour fluid slowly and wait for bubbles to disperse.

10. Start engine and idle for one minute. Stop engine.
11. Check the brake fluid level in reservoir, it should be below MAX level line. Top – up to MAX level line.