engine AUDI A4 2000 B5 / 1.G AWM Engine Secondary Air System User Guide

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- Check for open circuit in wiring from
secondary air injection pump relay (in 3-
position relay carrier in E-box of plenum
chamber) via fuse S234 (in fuse box, position
34) to fuel pump relay.

Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
Check actuation of secondary air pump relay

- Switch ignition off.

- Remove secondary air injection pump relay.

- Connect voltage tester VAG 1527 B as follows:3-position relay carrier in E-box in plenum chamber,
position 2
contact
Measure to

6 Engine
Ground
- Initiate output Diagnostic Test Mode (DTM) and activate secondary air
injection pump relay.

LED must flash.
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If LED does not flash:

- Switch ignition off.

- Connect VAG 1598/31 test box to wiring
harness leading to engine control module;
engine control module should not be connected:

Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel
Injection & Ignition, Engine Code(s): AWM, Repair Group 24


If no malfunction is found: - Check for open circuit and short to positive or Ground in following
wiring connection: 3-position relay carrier in E-box in plenum
chamber, position 2
Contact
Test box VAG
1598/31


6 66
- Repair any open/short circuit as necessary.
- Replace Secondary Air Injection Pump relay -J299-.
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Check voltage supply for secondary air
injection pump motor

- Remove sound insulation -arrows-.

- Disconnect connector from Secondary Air Injection (AIR) Pump motor -
V101- (-arrow-).
Location: Right front in engine compartment below air filter housing
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Combination valve for secondary air
inlet, checking function and for leaks


Special tools and equipment

Test requirements:
Test sequence
Vacuum hand pump VAG 1390Vacuum lines and hose connections do not leak. Vacuum lines not blocked.

- Remove engine cover -arrows-.
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Combination valve for secondary air
inlet, removing and installing


Removing

- Remove engine cover -arrows-.

- Disconnect hoses -1- and -2- from combination valve.
- Unbolt combination valve -arrows-.
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