battery AUDI A4 1997 B5 / 1.G AEB ATW Engines Charge Air System With Turbocharger Workshop Manual

21-56


Notes: - Turn turbocharger tester on and select measuring range -I- (absolute
pressure).
- Connect test hose to connection barb -I-.
Hoses must be properly connected and there must be no possibility of
leaks, otherwise incorrect readings may result. Make sure that the test hose is not pinched at the hood or at the side
window. By pressing memory button "M" on turbocharger tester, the last test
value is saved until either memory button "M" is pressed again or the
turbocharger tester is shut-off. A blinking comma in the display field indicates that a value has been
saved. An arrow appears in the top left corner of the display field if the
turbocharger tester battery voltage drops below the permitted
threshold. Before testing, drive vehicle rapidly for at least 3 km on a road that
does not require stopping (i.e. traffic lights or similar). A second technician is required because the indicated values must be
read out while the vehicle is being driven.
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- Switch ignition on.


Specified value: approx. 5 V
If specified value is not obtained:

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition,
Repair Group 24 - Connect VAG1598/31 test box to wiring harness -2- for Engine Control
Module (ECM), also connect ECM -1-. Connect Ground (GND) clamp -
3- to negative battery post.

If the specified value is met: - Check the following wire connections for open circuit and short circuit
to Ground (GND) and B+: Harness connector
terminal
VAG1598/31 test box
socket
1 108
3 98
- Repair open circuit or short circuit if necessary.
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Special tool LKI9210 (Evaporative system
leak detector), preliminary set-up

- Connect smoke generator leads to vehicle
battery.

With system filled with smoke:
Special tool VAG 1687, connecting to pressure adapter VAG 1687/1
(1.8L Turbo)
For illustrations purposes VAG is shown lying in the engine compartment.
In practice the tool should be hung from the hood. - Turn valve to test -black arrow-.
- Press smoke generator button to fill system with smoke (see
instructions printed on tester).
- Remove smoke generator hose and connect VAG1687 quickly to
prevent smoke from leaking out Page 21
-73
.
- Connect VAG 1687 quickly to prevent smoke from leaking out.

VAG 1687 is shown connected to VAG 1687/1 -black arrow-
Shop air supply will be connected to VAG 1687 -at white arrow-
- Perform pressure test Page 21
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.21.3