AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual A4 1996 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/967/w960_967-0.png AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual

Page 1 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-31
 
  
Secondary air system The secondary air system results in quicker heating 
and therefore earlier operating readiness of the 
catalytic converter following cold start.  
Principle  
Due to ov

Page 2 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-32
 
  
Function:  
 
In the cold start phase, the ECM -4- activates 
the secondary air pump -2- via the relay for 
secondary air pump -3-. Air reaches the 
combination valves for Secondary Air Inj

Page 3 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-33
 
  
2 - 
Motronic Engine Control Module (ECM) -
J220- 
3 - 
Combination valve for secondary air 
injection (AIR) 
4 - 
Secondary Air Injection (AIR) solenoid 
valve -N112- 
Installation positio

Page 4 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-34
 
  
Secondary Air Injection (AIR) system 
components, removing and installing
 
The components for the Secondary Air Injection 
(AIR) system are located under the air distributor 
between the i

Page 5 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-35
 
  
7 - 
10 Nm 
8 - 
Secondary Air Injection (AIR) pump with 
air filter attached 
9 - 
10 Nm 
10 - 
Seal 
11 - 
Combination valve, right 
12 - 
Bracket for Secondary Air Injection (AIR) 
pump

Page 6 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-36
 
    
Fig. 1  Installation location of Secondary Air Injection (AIR) 
solenoid valve -N112- 
Bolted to rear intake manifold at bracket below control modules 
together with the connector for exh

Page 7 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-37
      
Secondary Air Injection (AIR) solenoid 
valve -N112-, removing and installing
 
    
-  Remove bolts (arrows) and remove engine covers -A- and -B-.
    
-  Remove air distributor (arrows)

Page 8 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-38
 
    
-  Disconnect both connectors -2- from control modules for exhaust gas 
temperature. 
-  Remove control modules from intake manifold and set wires aside.
-  Secondary Air Injection (AIR)

Page 9 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-39
 
  
Secondary Air Injection (AIR) solenoid 
valve -N112-, checking
 
Special tools and equipment  
 
VAG 1526A
 VAG 1527B
 VAG 1594A
 VAG 1598/31
 VAS 5051
- or 
 VAG 1551 with VAG 1551/3A
Pa
g

Page 10 of 29

AUDI A4 1996 B5 / 1.G APB Engine Secondary Air System Workshop Manual 26-40
       Installation location   Installation locations-
Overview       
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Ignition, Engine Code(s): APB, Repair Group 24
   
     
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