sensor AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst

AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/936/w960_936-0.png AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst

Page 3 of 17

AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst 21-3
 
  
Connection diagram for charge air control 
and vacuum pressure control 
 
1 - 
Activated charcoal filter (ACF) 
2 - 
EVAP Canister Purge Regulator valve -
N80- 
3 - 
Non return valve for ACF

Page 6 of 17

AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst 21-6
 
  
15 - 
Non-return valve 
Between ACF container and intake lineNote position (light side/ dark side) as 
shown in Fig; arrow faces in direction of 
flow 
16 - 
From Leak Detection Pump (LDP) -

Page 15 of 17

AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst 21-14
      
Effects of leaks in intake or exhaust 
system
 
     
Leak downstream of mass air flow sensor  
     
Effect: Loss of power
     
Possible malfunction sources:
     
1 - Connection hoses

Page 16 of 17

AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst 21-15
      
Leak downstream of exhaust turbocharger  
     
Effect: Charge pressure too low
     
Possible malfunction sources:
     
1 - Connection hoses and line between exhaust 
turbocharger and c