24-39
Checking voltage supply
Test requirements:
Fuse for fuel injectors OK
Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Fuel Pump (FP) relay OK; checking Page 24
-52
.
- Disconnect harness connector at the fuel
injector to be tested.
If LED does not light up: - Connect VAG1527B voltage tester as follows:Harness connector
Terminal
Measure to
1 Engine Ground (GND)
- Switch ignition on.
LED must light up.
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24-40
- Repair open circuit if necessary.
If LED lights up:
- Activation of fuel injectors, checking
Checking activation
Test requirement:
Internal resistance of valve OK
- Slide back rubber grommet of fuel injector
connector, but leave connector connected.
Note:
Voltage testers do not go out completely during low current pick-up
between activations by the ECM, but rather continue to glow a little and
then get slightly brighter during activation. - Connect VAG1527B voltage tester between sockets 2 (signal) and 1
(B+).
- Operate starter briefly (engine can also start).
LED must blink.
Pa
ge 44 of 79 Motronic in
jection s
ystem, servicin
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11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.1
