check engine AUDI A4 1998 B5 / 1.G Cruise Control On Board Diagnostic Workshop Manual

01-207

Read Measuring Value Block 66
0 km/h
1 0 0 0
0km/h
0 0 0 0

Indicated on display
Checking displays in display fields 2 and 4
Read Measuring Value Block 66
0 km/h
1 0 0 0
0km/h
0 0 0 0

Display check, display field 2
If the nominal value in display field 2 for "cruise control released" (1000) is
not attained:
Repair Manual, Fuel Injection & Ignition, Repair Group 01
Test conditions
Display field 2
Cruise control released (activated) 1000
Brake applied (brake pedal switch) 1011
Clutch applied 1100
- Check engine control module identification.- If "G" is not displayed after component name, cruise control is not
activated. Activate cruise control system Page 01
-209
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Pa
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gnostic
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11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.EE01.01.3

01-208

Read Measuring Value Block 66
0 km/h
1 0 0 0
0km/h
0 0 0 0

Display check, display field 4
Test conditions
Display field
4
Switch -B- in "OFF" (AUS) position 0000
Switch -B- to "ON" (EIN) position 0011
Memory set, switch -B- to "OFF" (AUS) before
engaging 0001
Button -A- pressed, "SET" (FIX) 0111
Switch -B- to "RES" (AUFN) 1011

If the nominal values in display field 4 are not attained even though switch
-B- is set to "ON" (0011):
- Connect VAG1598/31 breakout box to engine control module harness
Page 01
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ge 6 of 13 Cruise control On Board Dia
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.EE01.01.3

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
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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