Audi A3 1997 Manual page 88

Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A=)
3.2 Connector
A contact 4
and
connector
A, contact
12
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A=)
Test step Contact at
connector
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
to -J293
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
3.3 Connector
A contact 6
and
connector
A, contact
12
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A=)
Test step Contact at
connector to -
J293
3.4 Connector A
contact 4
and
connector A,
contact13
Notes:
◆ The contact 13 in connector -A- is not occupied in all vehicles. Switching off of the compressor when re‐
frigerant temperature is too high occurs via the operating and display unit -E87 in vehicles in which the
contact is not occupied (if the contact is occupied switching off occurs simultaneously via -E87 and -J293).
◆ If earth is applied to connector -A- contact 13, the radiator fans are actuated and the compressor is not
switched on.
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Bridge at connector A between contact 4 and contact 12
82
01 - Self-diagnosis, Electrical check
Signal for "Refrig‐ ▪ Engine running
erant circuit pres‐ ▪ The fault reader
sure OK" to -E87 V.A.G 1551 remains
connected.
▪ The self-diagnosis
for the air conditioner
(address word "08")
is initiated.
▪ The display group
"001" is selected in
the function "read
measured value
block".
Press "Auto"-key on
-E87.
Testing of ▪ Test conditions
- Additional opera‐
tions
Signal for "Refriger‐ ▪ Engine running.
ant circuit pressure ▪ The fault reader
NOK" to -E87 V.A.G 1551 remains
connected.
▪ The self-diagnosis
for the air condition‐
er (address word
"08") is initiated.
▪ The display group
"001" is selected in
the function "read
measured value
block".
Testing of
Connection to input
for "Refrigerant tem‐
perature too high"
recognition
- Less than 1 A
"0" is displayed in
the measured value
block of -E87 (dis‐
play group "001",
display zone "1")
Specified value
- Less than 1 A
"1" is displayed in
the measured value
block of -E87 (dis‐
play group "001",
display zone "1")
▪ Test conditions Specified value Remedies if specified
- Additional opera‐
tions
▪ Ignition on. - 0 A
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short to posi‐
tive or earth in the
wiring between con‐
trol unit -J293 and -
E87.
Eliminate cause of
compressor shutoff
condition
Remedies if speci‐
fied value not at‐
tained
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short to posi‐
tive in the wiring be‐
tween control unit -
J293 and -E87.
value not attained
- Rectify short circuit
to earth in connector
A contact 13.