fuse AUDI TT 1995 8N / 1.G AEB ATW Engines Secondary Air System Workshop Manual

26-35

Checking voltage supply

- Disconnect harness connector from Secondary
Air Injection (AIR) solenoid valve -N112-.

If LED does not light: - Connect VAG1527B voltage tester as follows:Harness connector
terminal
Measure to
1 Engine Ground (GND)
- Operate starter briefly.

LED must light.
- Perform the following tests marked with dots:

Check fuse S234 (in fuse holder, position 34).
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26-36


Electrical Wiring Diagrams, Troubleshooting & Component Locations
Repair Manual, Fuel Supply System, Repair Group 20

Checking activation
Check wire connection from terminal 1 of connector via fuse S234 (in
fuse holder, socket 34) to Fuel Pump (FP) relay for open circuit: Check Fuel Pump (FP) relay

- Connect VAG1527B voltage tester between terminals 1 and 2 using
test leads from VAG1594A.
- Connect VAG1551 scan tool.
- Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air
Injection (AIR) solenoid valve -N112-.
Output Diagnostic Test Mode Secondary Air Inj. Solenoid Valve -N112

Indicated on display

LED must blink.
Pa
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11/18/2002 htt
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26-40

Checking voltage supply of Secondary Air
Injection (AIR) pump relay

- Remove Secondary Air Injection (AIR) pump
relay.

If specified value is not obtained: - Connect multimeter for voltage measurement as follows.3-socket relay carrier in E-box, plenum
chamber, position 2
terminal
Measure to

8 Engine Ground
(GND)

Specified value: approx. battery voltage
- Perform the following tests marked with dots:

Electrical Wiring Diagrams, Troubleshooting & Component Locations Check fuse S130 (40 A) in 3-socket relay carrier in E-Box, plenum
chamber, position 7. Check wire connection from Battery (B+) (terminal 30) to Secondary
Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in E-
Box, plenum chamber, position 2) for open circuit.
Pa
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11/18/2002 htt
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play?action=Goto&t
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26-41


If specified value is not obtained: - 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.

Specified value: approx. battery voltage
- Perform the 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:
Pa
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ystem, checkin
g (en
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)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.GE02.26.2