check engine AUDI A4 2000 B5 / 1.G AC System On Board Diagnostic User Guide

01-45

Notes:

If a DTM component fails to respond as
specified, perform all corrective actions, checks
and tests recommended in output DTM table
page 01
-46
.

A/C system component locations: engine
compartment page 87
-96
(note specific
model year information).

A/C system component locations: passenger
compartment page 87
-106
(note specific
model year information).

Output DTM can be ended by pressing the -C-
button.
After ending output DTM, check DTC memory
page 01
-18
.

If the readout "function unknown or cannot be
carried out at the moment" appears in the
display at the start of output DTM, e.g. when
engine not running, press button and once
again select "function 03 Output Diagnosis Test
Mode (DTM)" (DTM component "A/C Clutch
N25" is no longer actuated for this test).
Pa
ge 63 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1

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
ge 76 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1

01-60

CAUTION!

Part numbers are for reference only.
Always check with your Parts Dept. for the
latest information.
Coding example:

- Enter code "00062" by pressing applicable
buttons on key pad of VAG1551.
Code Control ModuleEnter code number 00062

Indicated on display
Notes: - Press -Q- button to confirm input.
- Perform basic setting page 01
-52
.
Nippondenso A/C compressors must have A/C control head Part No.
index "H" installed to allow coding "00162." If an unrecognized code is entered in a control head, it is suppressed
and coding "00042" (4-cyl. gasoline engine USA) is then stored. When replacing an A/C control head, always refer to the most recent
parts information.
Pa
ge 87 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1