battery AUDI A6 1999 C5 / 2.G AHA Engine Multiport Fuel Injection And Ignition System User Guide

24-91

- Check battery positive voltage (B+) in display
field 2.

Display fields

1 2 3 4
Display group 4: General engine data
Display xxx RPM xx.xxx V
xxx.x C
xxx.x C
Indicates Engine speed
(in 40 RPM
steps) Battery Positive Voltage (B+)
Terminal 15 Engine coolant
temperature Intake air
temperature
Range 0 - 6800 RPM 0.000 - 16.500 V -46.5 to 141.0 -46.5 to 141.0
Specified
value 0 RPM 10.000 - 14.500 V --- ---

--- If not as specified page 24
-92
, Evaluation
of display group 4
--- ---
If displayed value is OK (as specified):

-
Press button.
- Press buttons -0- and -6- to select "End Output"
function 06, and press -Q- button to confirm
input.
Pa
ge 117 of 166 Motronic Multi
port Fuel In
jection
(MFI
) and i
gnition s
ystem
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.1

24-92
Evaluation of display group 4 Display group: 4


Display field: 2
Possible malfunction
cause
Corrective action
If "Control module does not answer" is
displayed
Fuse for ECM faulty- Replace fuse
Open circuit in wiring- Check voltage supply at terminal 15 page
24
-94

Displayed value changes between 10.0 -
14.5 V
Intermittent connection- Check voltage supply at terminal 15 page
24
-94

- Check voltage supply at terminal 30 page 24
-93

0.0 - 10.0 V
Battery discharged/faulty Voltage regulator faulty- Check battery
- Check generator
- Check voltage regulator
14.5 - 16.5 V Generator faultyVoltage regulator faulty- Check generator
- Check voltage regulator
Pa
ge 118 of 166 Motronic Multi
port Fuel In
jection
(MFI
) and i
gnition s
ystem
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.1

24-99

Checking fuel pump relay voltage supply and
actuation

- Remove fuel pump relay -J17- from relay panel
position 6.

Checking fuel pump relay voltage supply

- Switch ignition on.

If voltage is NOT OK: - Connect multimeter US1119 (Fluke 83 or similar) and check for voltage
at relay socket:

Terminals 28 (B+) and 34
Terminals 32 (B+) and 34
Specified values: approx. Battery Positive Voltage (B+)
- Repair wiring according to applicable wiring diagram.
Pa
ge 127 of 166 Motronic Multi
port Fuel In
jection
(MFI
) and i
gnition s
ystem
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.1