Testing Secondary Air Pump - Skoda Octavia Workshop Manual

OCTAVIA
Edition 04.03
S00.5127.54.20
Exhaust System

Testing secondary air pump

Special tools, testers and aids required
♦ Vehicle system tester V.A.G 1552 with cable
V.A.G 1551/3, 3A, 3B or 3C
♦ Multimeter e.g. V.A.G 1526 A
Test conditions
K l Fuse for secondary air pump relay -J299-
-arrow- in main fuse box on battery o.k.
l Relay -J299- O.K.
l Intake hose for secondary air pump is not
blocked or kinked.
Test procedure
- Removing engine cover ⇒ page 10-2.
- Remove pressure hose leading from second-
ary air pump to combination valve.
- Actuate the secondary air pump relay via the
actuator diagnosis
⇒ 2.0 litre/85 kW Engine, Fuel Injection and
Ignition System; Rep Gr. 01, Actuator diag-
nosis.
Secondary air pump must start at regular in-
tervals and air must flow out at the outlet con-
nection
- If the pump does not start, test the voltage
supply of the pump.
- Disconnect the 2-pin plug on the secondary
air pump and connect the multimeter to the
voltage measurement.
- Actuate the secondary air pump relay via the
actuator diagnosis.
- Specified value: alternately 0….12V in shift
rhythm of the pump relay
- If the specified value is not reached, inspect
cables according to Current Flow Diagram.
- If the specified value is reached, replace
secondary air pump.
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