automatic transmission AUDI A4 2000 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual

24-8


8 -
Sensor -1- for exhaust temperature -G235
At rear of intake manifold on the left-hand
side (looking from the front of the engine
compartment) On vehicles with automatic
transmission the Sensor -2- for exhaust
temperature -G236 is located at this
position see page Page 24
-14
.
9 -
Secondary Air Injection (AIR) Solenoid
Valve -N112
Only on vehicles with automatic
transmission
10 -
Secondary Air Injection (AIR) Pump Motor
-V101 Only on vehicles with automatic
transmission
11 -
Sensor -2- for exhaust temperature -G236 On vehicles with automatic transmission
the sensor is located with Sensor -1- for
exhaust temperature -G235 at Position -8-.
Both sensors are located behind each
other Page 24
-14
.
Pa
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port Fuel In
jection
(MFI
) system, servicin
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11/22/2002 htt
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24-9


12 -
Recirculating valve for turbocharger -
N249
13 -
Fuel pressure regulator
14 -
Camshaft Position (CMP) Sensor 2 -G163
Cylinder bank 2Previously identified as Camshaft Position
(CMP) Sensor 2 -G40
15 -
Secondary Air Injection (AIR) Pump Relay
-J299 Only on vehicles with automatic
transmission
16 -
Motronic Engine Control Module (ECM) -
J220
17 -
3-pin harness connector For Engine Speed (RPM) Sensor -G28grey
18 -
3-pin harness connector For Knock Sensor (KS) 2 -G66
19 -
Harness connector for Heated Oxygen
Sensor (HO2S) 2 -G108 and Oxygen
Sensor (O2S) Heater -Z28 4-pin black
Pa
ge 11 of 90 Motronic Multi
port Fuel In
jection
(MFI
) system, servicin
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24-14

Component location for exhaust temperature
sensors on vehicle with automatic
transmission:

Fig. 1 Component location for exhaust temperature sensors on
vehicle with automatic transmission:
1 - Sensor -1- for exhaust temperature -G235
2 - Sensor -2- for exhaust temperature -G236
Pa
ge 16 of 90 Motronic Multi
port Fuel In
jection
(MFI
) system, servicin
g
11/22/2002 htt
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yp
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pair&id=AUDI.B5.FU04.24.1

24-15


Intake manifold, removing and installing

Note:
The procedure is described for vehicles with
manual transmission. On vehicles with automatic
transmission remove also the secondary air
injection pump.
- Remove air distributor Page 24
-43
.
1 -
Unclip Wastegate Bypass Regulator Valve
-N75 from fuel rail.
Pa
ge 17 of 90 Motronic Multi
port Fuel In
jection
(MFI
) system, servicin
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24-26

Important Note:
After installing new engine control module, carry
out the following operations:
- Check DTC memory and erase if necessary
Page 01
-15
.
- Perform adaptation of Throttle Valve Control
Module -J338 Page 24
-146
.
- Observe notes for coding new engine control
module Page 01
-93
.
- On vehicles with cruise control (recognizable at
steering column switch), activate cruise control
function in the engine control module.

Repair Manual, Electrical Equipment, Repair
Group 01

- On vehicles with automatic transmission carry
out adaptation for Kick-Down switch Page 24
-
166
.
- Generate readiness code Page 01
-105
.
- Perform adaptation of immobilizer to engine
control module

Pa
ge 29 of 90 Motronic Multi
port Fuel In
jection
(MFI
) system, servicin
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pair&id=AUDI.B5.FU04.24.1

24-27

Idle speed, checking


Test conditions

No leaks in exhaust system
Coolant temperature at least 80 C

Electrical consumers switched off (radiator
fan must not run during the check)
A/C switched off
Pressure gauge not connected
Selector lever in position P or N (vehicles
with automatic transmission)

Checking idle speed

Notes:
The idle speed cannot be adjusted.
The idle speed is tested during the basic setting
of the engine.
Pa
ge 31 of 90 Motronic Multi
port Fuel In
jection
(MFI
) system, servicin
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11/22/2002 htt
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24-43

Fuel injection volume, fuel injector
leakage and spray pattern of injectors,
checking


WARNING!

Fire hazard! The fuel system is pressurized.
Before loosening hose connections or
opening the test connection (to measure fuel
pressure), place a cloth around the
connection. Then release pressure by
carefully pulling off the hose or cap.

Test conditions

Fuel pressure OK; testing Page 24
-33
.
To reach the fuel rail, the following steps must be
performed on vehicles with manual transmission
(without secondary air injection). On vehicles
with automatic transmission (with secondary air
injection) are minor differences in the work
procedure.

Several hoses must now be disconnected: - Unscrew bolts on air duct at points indicated (arrows) and remove air
duct.
- Absolute cleanliness must be maintained.
Pa
ge 51 of 90 Motronic Multi
port Fuel In
jection
(MFI
) system, servicin
g
11/22/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.24.1