1999 AUDI A4 sensor

01-43
Notes:

During Output DTM on vehicles with Control Head (E87) Part Number 8D0 820 043 D, A/C Compressor Clutch (N25) DTC
"01270, mechanical malfunction SP" may be stored even though no malfunction is present. Corrective action: When
output DTM is complete, check DTC memory. If above DTC is present, erase DTC memory.
When starting Output DTM, temperature and air distribution flap flap motors move to pre-determined positions in
preparation for individual tests: Temperature Regulator Flap Motor V68: moves to "heat" position. Central Air Flap Motor -
V70- moves to "floor & defroster outlet" position. Footwell Defroster Flap Motor V85 moves to "defrost" position.
Output DTM can be repeated several times, if necessary.
During Output DTM, vehicle must not be moved and engine speed must be less than 3000 rpm.
During Output DTM, A/C system control is switched off and all segments in both A/C control head displays are actuated.
Interior temperature sensor fan -V42- is activated via an A/C control head:
with one display after activation of the coolant fan.
with two displays after activation of air flow flap motor.
Outside air temperature display -G106- is activated via an A/C control head
with one display after activation of air flow flap motor.
with two displays after activation of idle regulation.
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For the A/C control head -E87-, the instrument panel interior temperature sensor -G56- is installed with only one display in
the -E87-. -V42- and -G56- are not individually replaceable. If -E87- is malfunctioning, they must be replaced together.
A/C control heads with one display indicate that output diagnostic test mode is completed after activation of the last
component ("END" is indicated on the Scan Tool display).
Pa
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01-50

VAG1551 scan tool
display Specified function
Corrective action
Interior Temperature
Sensor Fan V42 - V42 (for temperature sensor in
instrument panel) is switched on and off
every 5 seconds1) - Test wiring/connections between V42 and -E87- for
open circuit or short circuit to ground using wiring
diagram
- Test voltage supply for V42 using wiring diagram
- Check intake slot and intake hose for
restriction page 87
-145

- Replace -E87-
1)Confirm operation by blowing smoke over intake slot on center of instrument panel.
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01-54

Notes:

For m.y. 1996, because A/C engine coolant
temperature sensor G110 is not installed on
USA/CDN models, during basic setting, DTC
"00799 engine coolant temperature sensor
G110" is stored and must be erased.
For m.y. 1997 A/C engine coolant temperature
(ECT) sensor -G110- is deleted, and will no
longer load a DTC when checking DTC memory
after ending basic setting.

- Check DTC memory page 01
-18
.

- Erase DTC memory (function 05) and end
output (function 06) page 01
-55
.
Pa
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01-57

Code Control Module (function 07)


A/C control head -E87- coding, vehicles 1996

Notes:

A/C control head coding 1997 page 01
-
59
.

A/C control head coding 1998 page 01
-
61
.
A/C control head -E87- coding shows market
application, compressor type and engine type.

Notes:

Zexel A/C compressors are installed from start
of production. During m.y. 1996, Nippondenso
type compressors are installed as a running
change. These compressors are not equipped
with A/C speed sensor G111.
Each time A/C control head -E87- is coded,
basic setting must be performed page 01
-
52
.

If a the display of a newly installed A/C control
head -E87- flashes after switching ignition on
(for approximately 2 minutes), code the control
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01-58

Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -7-.
Rapid data transfer
Q
07 - Code Control Module

Indicated on display
- Press -Q- button to confirm input.
Code Control ModuleEnter code number XXXXX

Indicated on display
Coding m.y. 1996:
Note:
Coding example, m.y. 1996: 0 0 1 6 2
0 = open
0 = open
1 = compressor w/o Compressor Speed Sensor -G111-
(0 = compressor with -G111-) -
Press button.Code
Market
Compressor
Engine
00062
USA/CDN
Zexel
6-cylinder gasoline
00162
USA/CDN
Nippondenso
6-cylinder gasoline
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01-59

A/C control head -E87- coding, vehicles 1997

Note:
A/C control head coding 1996 page 01
-57
.

Code
Market
Compressor
Engine
04142
USA/CDN
Zexel
4-cylinder
gasoline
04162
USA/CDN
Nippondenso
6-cylinder
gasoline

Note:
Coding example, m.y. 1997: 0 4 1 4 2
0 = open
4 = Audi A4
1 = compressor w/o compressor speed sensor -
G111-
4 = 4-cyl. engine
(6 = 6-cyl. engine)
2 = gasoline engine USA/CDN

Notes:
Pa
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e=re
pair&id=AUDI.B5.HA01.01.1