coolant temperature AUDI A6 1997 C5 / 2.G AHA ATQ Engines Secondary Air System Workshop Manual

& Ignition, Repair Group 01

Notes:

The secondary air injection system injects air
behind the exhaust valves during a cold start.
Cold start means engine coolant temperature
between 8-65 C (46-149 F). The amount of
air injected is temperature dependent.

The need for secondary air is triggered by the
Motronic Engine Control Module (ECM) -J220-
via the Secondary Air Injection (AIR) Injection
pump relay -J299- to the Secondary Air
Injection (AIR) solenoid valve -N112- and the
two combination valves.
When "Basic Setting" (scan tool function 04) is
initiated, a diagnosis for the secondary air
injection system can be carried out. The
diagnostics consists of a flow test and a leak
test.
Pa
ge 2 of 10 Secondar
y Air In
jection
(AIR
) system
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