AUDI A4 1999 B5 / 1.G Cruise Control On Board Diagnostic User Guide

01-211

- Switch ignition off.

- Remove control module protective housing
cover.

- Using screwdriver, carefully pry off retainer (arrow).
- Release and disconnect harness connectors from control module.

- Connect VAG1598/31 breakout box to harness connector. Connect
breakout box Ground clip (not visible in illustration) to battery negative
terminal. Check respective test descriptions to see if it is necessary to
connect engine control module to breakout box.
- Perform tests as described in respective repair instructions.
Pa
ge 11 of 13 Cruise control On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.3

01-212

- Disconnect 15-pin harness connector for cruise
control switch, clutch vacuum vent valve switch -
F36- and to brake vacuum vent valve switch -
F47- for cruise control.

- Check the following connections for a short to
positive, short to Ground (GND) or an open
circuit:

Gasoline engine: 2.7 liter/184 kW V6 twin-
turbo

Terminals on 15-pin
harness connector VAG1598/31 breakout
box, socket
7 76
8 75
9 57
10 38

- If necessary, repair open or short circuit.
Pa
ge 12 of 13 Cruise control On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.3

01-213

Terminals on 15-pin
harness connector VAG1598/31
breakout box,
socket
13
to clutch vacuum vent valve
switch -F36- (terminal 1) 39
11
to brake vacuum vent valve
switch -F47- for cruise
control (terminal 2) 56
12
to brake vacuum vent valve
switch -F47- for cruise
control (terminal 4) 55

- If necessary, repair open or short circuit.
Pa
ge 13 of 13 Cruise control On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.3