Audi AMB Service Manual page 306

ENGINE 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AMB
Connect multimeter and measure voltage as follows.

3-way relay carrier in electronics box in plenum
chamber, position 2, contact
Specification: approx. battery voltage

If reading does not match specification:
Perform following checks marked with a dot:

Fig. 400: Location Of Secondary Air Injection (AIR) Pump Relay J299
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Check fuse S130 (40 A) in 3-way relay carrier of electronics box in plenum chamber, position 7.

Check for open circuit in wiring from battery+ (terminal 30) to fuse S130 to Secondary AIR pump relay

J299 (in 3-way relay carrier of electronics box in plenum chamber, position 2).
--> Electrical Wiring Diagrams, Troubleshooting and Component Locations
Fig. 401: Identifying Secondary Air Pump Relay Terminals
Courtesy of VOLKSWAGEN UNITED STATES, INC.
2005 Audi A4 Quattro
8
1:01:35 AM
Measure to
Engine Ground
Page 294