Golf L4-2.0L (ABA) (1996)
Air Injection Pump: Testing and Inspection
SECONDARY AIR INJECTION SYSTEM, CHECKING
Function-Overview
Vehicles 06-96>
The Secondary Air Injection system injects air behind the exhaust valve for approx. 30 seconds depending upon Engine Coolant Temperature,
load, RPM and air flow rate, during the cold start. (+5°C to +40°C Engine Coolant Temperature)
Secondary Air Injection operation:
-
Produces an Oxygen rich exhaust
-
Causes after-burning
-
Reduces the duration of the three-way catalyst heat-up phase
Activation is initiated by the Motronic Engine Control Module J220 via the Secondary Air Injection system pump relay J299 to the solenoid valve
and Pneumatic-valve.
In addition to the engine cold start warm up phase, the Secondary Air Injection system is checked via On Board Diagnostic (up to an 80°C Engine
Coolant Temperature, maximum)
If the readiness code is being created:
Engine Coolant Temperature can also be above 80°C
Secondary Air Injection System Components, Removing And Installing
NOTE: Complete system is checked via On Board Diagnostic.
1
Pneumatic-valve
Checking
See Below.
2
to brake servo line connector
3
Vacuum hose
4
2-pin harness connector
5
Secondary Air Injection solenoid valve
Checking:
See Below.
6
Pressure hose
Ensure it is securely seated
7
Secondary Air Injection system pump motor bracket
See Below.
8
10 Nm (7 ft lb)