Table of Contents > Brakes hydraulics > Testing for leaks

VW Tiguan Brake System ➜ Testing for leaks

Tiguan 2021 ➤, Tiguan RUS 2021 ➤  
Brake system - Edition 10.2020  
– Connect brake filling and bleeding appliance -VAS 6860-.  
– Depress brake pedal firmly and hold.  
– Open bleeder valve on brake caliper.  
– Fully depress brake pedal.  
– Close bleed valve with pedal held down.  
– Release brake pedal slowly.  
This bleed sequence must be carried out 5 times per brake  
1 - Front left brake caliper  
2 - Front right brake caliper  
3 - Rear left wheel brake cylinder  
4 - Rear right wheel brake cylinder  
Use an appropriate bleeder hose. It must be firmly seated on  
the bleeder valve so that no air can enter the brake system:  
– Leave bleeder valve of each brake caliper open with bleeder  
hose fitted until brake fluid discharges free of air bubbles.  
A road test must be carried out after the brakes have been  
bled. When doing this an ABS regulation must be performed  
at least once!  
Testing for leaks  
Special tools and workshop equipment required  
♦ Tester for brake pressure regulator -V.A.G 1310 A-  
♦ Adapter M10 -V.A.G 1310/6-  
Prerequisite for testing:  
Brake system (hydraulic unit, brake hoses, brake lines and  
brake calipers) operating properly and free of leaks.  
– Remove bleeder valve at one of front brake calipers.  
– Connect pressure gauge -V.A.G 1310 A- and bleed.  
– Apply pressure to brake pedal until gauge indicates a pres‐  
sure of 50 bar. The pressure must not drop by more than  
4 bar during the test period of 45 seconds. Renew brake  
master cylinder if drop in pressure exceeds specification.  
Rep. gr.47 - Brakes - hydraulics  

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