A4 Quattro Wagon L4-1.8L Turbo (ATW) (2000)
Intercooler: Service and Repair
Boost Pressure Regulation/Secondary Air Vacuum Control System
Boost pressure regulation and secondary air system vacuum control system
1 - EVAP canister
2 - From fuel tank
3 - Evaporative Emission (EVAP) canister purge regulator valve -N80-
4 - Check-valve for EVAP canister
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Between EVAP canister and intake manifold before turbocharger
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Installation position (light/dark side): Arrow points in direction of flow, as shown
5 - Air cleaner
6 - Turbocharger
7 - Combination valve for secondary air injection (AIR)
8 - Fuel pressure regulator
9 - To power brake booster
10 - Check valve
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Installation position (light/dark side): Arrow points in direction of flow, as shown
11 - Vacuum booster
12 - To Leak Detection Pump (LDP)
13 - Vacuum reservoir
14 - Distributor - piece
15 - Check valve
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Installation position (light/dark side): Arrow points in direction of flow, as shown
16 - Secondary - Air Injection (AIR) solenoid valve -N112-