Audi A3 1997 - Page 90

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◆ The signal generated by high-pressure sensor -G65 is also used for engine control (the required compressor
drive torque is governed by the refrigerant circuit pressure). Depending on the engine control unit version,
the signal in the measured value block is displayed as duty cycle.
=> Relevant Workshop Manual Injection and Ignition system
Test step 5 (other connections)
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector
to -J293
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if speci‐
fied value not at‐
tained
5.1 Connector
A contact 5
and
connector
A, contact
14
Connection via con‐
nector A (observe
notes).
- smaller 10 ω(ob‐
serve note).
- Eliminate open cir‐
cuit or contact re‐
sistance.
Note:
Connection (bridge) between contacts 5 and 14 at connector A are not present in all types of the control unit -
J293.
=> Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A=)
Test step Contact at
connector
to -J293
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if speci‐
fied value not at‐
tained
5.2 Connector
A contact 1
and
connector
A, contact 4
Function of pump
for refrigerant run
out -V51 (observe
note).
- smaller than 5A
(observe note).
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring be‐
tween pump -V51
and control unit -
J293.
Pump defective, re‐
place.
- Pump -V51 is run‐
ning (running noise
audible)
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring be‐
tween pump -V51
and control unit -
J293.
Locate open circuit
in earth wiring to
pump -V51 and elim‐
inate.
Pump defective, re‐
place.
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
84 01 - Self-diagnosis, Electrical check