ignition AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1999, Model line: A4, Model: AUDI A4 1999 B5 / 1.GPages: 29, PDF Size: 0.44 MB
Page 10 of 29
26-40
Installation location Installation locations-
Overview
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 24
Test requirement:
Output Diagnostic Test Mode (DTM)
performed
Checking internal resistance
- Disconnect harness connector from Secondary
Air Injection (AIR) valve -N112-.
- Connect multimeter at valve for resistance measurement.
Specified value: 25 ... 35
- If specified value is not obtained, replace Secondary Air Injection (AIR)
solenoid valve -N112-.
Pa
ge 10 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 12 of 29
26-42
Electrical Wiring Diagrams, Troubleshooting & Component Locations
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition,
Engine Code(s): APB, Repair Group 24
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 VAG 1527B voltage tester between terminal 1 and 2.
Pa
ge 12 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 13 of 29
26-43
- Initiate output Diagnostic Test Mode (DTM) and
activate Secondary Air Injection (AIR) solenoid
valve -N112
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01
Output Diagnostic Test Mode Secondary. air. inj. solenoid valve -N112
Indicated on display
If LED does not blink or if it remains constantly lit:
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): APB, Repair Group 24
LED must blink.
- Connect VAG 1598/31 test box at wiring harness to ECM, do not
connect ECM.
- Check the following wire connections for open circuit and short circuit
to Ground (GND) and B+: Harness connector terminal
VAG 1598/31 test box
Bushing
2 44
- Repair open circuit or short circuit if necessary.
Pa
ge 13 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 14 of 29
26-44
If wire connection is OK:
- Replace Engine Control Module (ECM).
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 24
Pa
ge 14 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 16 of 29
26-46
Installation location Installation locations-
Overview.
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 24
Test sequence
- Initiate output Diagnostic Test Mode (DTM) and
activate Secondary Air Injection (AIR) pump
relay -J299-
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01
A - If relay does not trigger:
The Secondary Air Injection (AIR) pump relay (in 3-socket relay
carrier in the E-box, at left in plenum chamber, position 2) must
engage and the Secondary Air Injection (AIR) pump motor -V101-
must run in intervals
- Check voltage supply of Secondary Air Injection (AIR) pump relay
Page 26
-47
.
-
Check activation of Secondary Air Injection (AIR) pump relay Page
Pa
ge 16 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 18 of 29
26-47
Checking voltage supply of Secondary Air
Injection (AIR) pump relay
- Switch ignition off.
- Remove Secondary Air Injection (AIR) pump
relay
- 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)
Specification: approx. battery voltage
If specified value is not obtained:
- Perform following tests marked with dots:
Check fuse -S130- (40 A) in 3-socket relay carrier in E-Box, plenum
chamber, position 7.
Pa
ge 18 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 21 of 29
26-49
Check activation of the Secondary Air
Injection (AIR) pump relay
- Switch ignition off.
- Remove Secondary Air Injection (AIR) pump
relay.
- Connect VAG 1527B voltage tester as follows:
3-socket relay carrier in E-box,
plenum chamber, position 2
terminal
Measure
to
6 B+
- Initiate output Diagnostic Test Mode (DTM) and
activate Secondary Air Injection (AIR) pump
relay -J299-.
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01
LED must blink.
If LED does not blink:
Pa
ge 21 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 22 of 29
- Switch ignition off.
Pa
ge 22 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 23 of 29
26-50
- Connect VAG 1598/31 test box at wiring
harness to ECM, do not connect ECM.
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 24
- Check following wire connection for open circuit
and short circuit to Ground (GND) and B+:
3-socket relay carrier in E-
box, plenum chamber,
position 2
terminal
VAG 1598/31
test box
Bushing
6 46
- Repair open circuit or short circuit if
necessary.
If no malfunctions are detected:
- Replace Secondary Air Injection (AIR) pump
relay -J299-.
Pa
ge 23 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2
Page 24 of 29
26-51
Check voltage supply of the Secondary Air
Injection (AIR) pump motor
- Remove connector for Secondary Air Injection
(AIR) pump motor -V101-.
- Connect VAG 1527B voltage tester between
terminals 1 and 2
- Initiate output Diagnostic Test Mode (DTM) and
activate Secondary Air Injection (AIR) pump
relay -J299-.
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01
LED must blink
Pa
ge 24 of 29 Secondar
y air s
ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.2