Skoda Octavia Workshop Manual page 152

26
------------ 26-12 -------------
Exhaust System
- Build up hand vacuum pump with vacuum.
Valve must open.
If the combination valve does not open
- Replace combination valve
⇒ page 26-14
For engines with identification characters
AQY and AZH ä 08.2000
For engine AZJ
Special tools, testers and aids required
♦ Vehicle system tester V.A.G 1552 with cable
V.A.G 1551/3, 3A, 3B or 3C
Test conditions
l No fault in fault memory
⇒ 2.0 litre/85 kW Engine, Fuel Injection and
Ignition System; Rep Gr. 01.
l Vacuum hoses and hose connections are
tight.
l Vacuum hoses are not blocked.
l Secondary air pump O.K.
l Relay -J299- O.K.
Test procedure
Note:
In still motion the valve is closed and is opened
through the air pressure of the secondary air
pump.
- Removing engine cover ⇒ page 26-3.
- Remove intake hose between throttle valve
and air filter ⇒ page 26-3.
- Slacken top union nut at connection pipe
between combination valve and exhaust
manifold, or slacken connection pipe by pull-
ing slightly.
- Actuate the secondary air pump relay via the
actuator diagnosis ⇒ 2.0 litre/85 kW En-
gine, Fuel Injection and Ignition System; Rep
Gr. 01.
Air should flow out in regular intervals
from the open connection point behind the
combination valve.
- If the combination valve does not open, re-
place combination valve ⇒ page 26-14
OCTAVIA
Edition 04.03
S00.5127.54.20