Part I

EGR Vacuum Regulator Solenoid Valve, Checking

Recommended special tools and equipment
- VAG1390 hand vacuum pump

Test sequence
- Remove engine cover.
- Unclamp connecting pipe between charge air cooler and exhaust pipe at exhaust pipe.
- Disconnect vacuum hose at EGR vacuum regulator solenoid valve.
- Connect V.A.G 1390 hand vacuum pump to valve.







- Operate hand vacuum pump and observe diaphragm rod.
Diaphragm rod must move in direction of arrow.
- Disconnect hose of hand vacuum pump from EGR valve.
Diaphragm rod must move back in opposite direction of arrow into the original rest position.