Air Injection: Service and Repair

Components of the secondary air system, removing and installing

Note:
^ Components marked with an * are checked by On Board Diagnostic (OBD):
Refer to Powertrain Management
^ Components marked with ** are checked by output Diagnostic Test Mode (DTM):
Refer to Powertrain Management, Secondary Air Injection (AIR) pump relay -J299 ** my, Position of relays in protective housing (on left in engine compartment)

1. Intake manifold
2. Vacuum actuator
^ For variable intake manifold change-over
3. To intake manifold
4. To fuel pressure regulator
5. Combi-valve
6. Gasket
^ Replace
7. Air channel
^ In cylinder head
8. 8 Nm
9. Ground connection
^ Check for secure seating
10. Unions
11. 5 Nm
12. Pressure hose
^ Check seated securely
^ Press together at front to release
13. O-ring
^ Replace if damaged
14. Union
15. Air cleaner
^ Clean if dirty
16. Retaining clip
17. Bracket
^ For secondary air pump motor
^ Secured to oil pan and cylinder block
18. 20 Nm
19. Rubber bushing
20. Secondary Air Injection (AIR) pump motor -V101 -**
21. Intake hose
^ Check for secure seating
^ Press together at front to release
22. Connector
^ Black, 2-pin
^ For intake manifold change-over valve
^ Mark connector and component before pulling connector off.
23. Connector
^ Black, 2-pin
^ For secondary air solenoid valve
^ Mark connector and component before pulling connector off.
24. Intake Manifold Change-Over valve -N156 *I**
^ Valve is activated by engine control module (pulsed)
25. Secondary Air Injection (AIR) solenoid valve -N 112-*/**
^ Valve is activated by engine control module (pulsed)
26. Vacuum reservoir
27. Non-return valve
^ Observe installation position
^ White connector faces Secondary air injection solenoid valve -N112-/intake manifold change-over valve -N156
28. Connector
^ Black, 2-pin
^ For secondary air injection pump motor





Fig. 1 Position of relays in protective housing (on left in engine compartment)
1. Secondary Air Injection (AIR) pump relay -J299-*/**
2. Motronic ECM power supply relay -J271-*

Note:
^ If tools are necessary to pull relays or control modules out of the relay plate, first disconnect the battery Ground strap.
^ Before disconnecting the battery Ground strap obtain the code for radios with anti-theft coding.