wiring AUDI A4 1998 B5 / 1.G AFC Engine Fuel Injectors Checking Workshop Manual

24-30

- Disconnect harness connector from fuel injector
to be checked.

If voltage tester does not light up:
If voltage tester does light up:
Checking fuel injector triggering - Connect VAG 1527B voltage tester between harness connector
terminal 1 and Ground (GND).
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger fuel
pump relay -J17- Repair Group 01. Specified value: voltage tester must light up
- Check wiring between terminal 1 and fuel injector fuse using wiring
diagram.
- Check fuel injector triggering.
- Disconnect harness connector from fuel injector to be checked.

- Connect VAG 1527B voltage tester between terminal 2 and battery
positive voltage (B+) using jumper wires from connector test kit VW
1594.
- Operate starter for several seconds (OK for engine to turn).
Voltage tester must flash
Pa
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p://127.0.0.1:8080/audi/servlet/Dis
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24-31
If tester does not flash, check wiring between
terminal 2 of the respective fuel injector and the
ECM as follows:

- Connect VAG 1598/19 test box to ECM harness connector Repair
Group 01. - Check fuel injector 1 signal wire for continuity between harness
connector terminal 2 and test box socket D1.

Specified value: max. 1 - Check fuel injector 2 signal wire for continuity between harness
connector terminal 2 and test box socket D2.

Specified value: max. 1 - Check fuel injector 3 signal wire for continuity between harness
connector terminal 2 and test box socket D4.

Specified value: max. 1 - Check fuel injector 4 signal wire for continuity between harness
connector terminal 2 and test box socket D5.

Specified value: max. 1 - Check fuel injector 5 signal wire for continuity between harness
connector terminal 2 and test box socket D6.

Specified value: max. 1
Pa
ge 4 of 5 Fuel in
jectors, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.24.6