Testing Secondary Air Injection Valve -N12 - Skoda Octavia Workshop Manual

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Exhaust System
Testing secondary air injection
valve -N112-
For engines with identification characters
AQY and AZH ä 07.2000
Test conditions
l Coolant temperature 5…33 °C
l Secondary air pump and relay O.K.
l Vacuum lines are not blocked.
Test procedure
K - Detach top part of vacuum hose -1- from sec-
ondary air injection valve.
- Start engine and run in idle.
If the secondary air pump motor starts,
vacuum must be felt at the vacuum hose.
If no vacuum can be felt:
- Switch off engine.
- Inspect actuation of secondary air injection
valve:
⇒ 2.0 litre/85 kW Engine, Fuel Injection and
Ignition System; Rep Gr. 01.
Removing and Inspecting combina-
tion valve
l Procedure for engines with identification
characters AQY and AZH ä 07.2000
l The procedure is similar for other engines
Special tools, testers and aids required
♦ Torque wrench
Notes:
♦ Always replace all gaskets and gasket rings.
♦ The assistance of a second mechanic is re-
quired for the installation.
OCTAVIA
Edition 04.03
S00.5127.54.20