Hydraulic System: Testing and Inspection

High-pressure and low pressure test
Special tools and equipment





^ VAG 1310A





^ VAG 1869/2

Test requirement:
^ Brake system (brake master cylinder, brake hoses, brake lines and brake calipers) tested for operation and tightness.

High-pressure test:
^ Remove bleeder screw at one of the front brake calipers. Connect pressure gauge VAG 1310 A and bleed.
^ Insert brake pedal depressor VAG 1869/2 between brake pedal and driver's seat. Apply pressure to brake pedal until the gauge indicates a pressure of 50 bar. The test lasts for 45 seconds, during which time the pressure must not drop by more than 4 bar.
If the drop in pressure is greater, replace the hydraulic control unit.

Low-pressure test:
^ Move the brake pedal depressor back until the pressure gauge indicates a pressure of 6 bar.
^ The test lasts for 3 minutes, during which time the pressure must not drop by more than 1 bar.
If the drop in pressure is greater, replace the hydraulic control unit.