fuse box diagram AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System Workshop Manual

26-48

- Connect multimeter for voltage measurement as
follows:

3-socket relay carrier in E-box,
plenum chamber, position 2
terminal
Measure to

4 Engine
Ground
(GND)

- Operate starter briefly.


Specification: approx. battery voltage
If specified value is not obtained:

- Perform following tests marked with dots:

Electrical Wiring Diagrams, Troubleshooting & Component Locations Check fuse -S234- (in fuse holder, position 34). Check wire connection from Secondary Air Injection (AIR) pump relay
-J299- (in 3-socket relay carrier in E-box, plenum chamber) via fuse -
S234- (in fuse holder, position 34) to Fuel Pump (FP) relay for open
circuit:
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