automatic transmission AUDI A4 2000 B5 / 1.G AC System Electrical Testing Workshop Manual

01-144

A/C control head -E87- connected to test box with adapter cable VAG1598/11
Measuring range: Current measurement (200 mA)
Test
Step VAG1598
socket Test of
Test conditions
- additional work Specified
Value Corrective action
5.10 Ground
and
12
"A/C compressor
intervention"
output.
Engine running. A/C compressor
off

- Switch on A/C
compressor



- Remove multimeter
connector probes
from test box - Less than 5
mA



- Less than
50 mA
- Compressor
does not en-
gage
- Compressor
engages
Repair Manual, Fuel Injection and
Ignition
Repair Manual, Automatic
Transmission - Diagnose and repair short circuit to
positive in wiring/connections using
wiring diagram.
- Replace A/C control head -E87-.



- Diagnose and eliminate A/C
compressor cut-off condition(s) from
Engine Control Module (ECM) or
Transmission Control Module (TCM)
- Diagnose and repair short circuit to
ground in wiring/connections using
wiring diagram.
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