1996 AUDI A8 wiring

24-147

Checking wiring

- Connect VAG1598/22 test box to ECM harness
connector page 01
-67
.

- Connect multimeter US1119 (Fluke 83 or
equivalent), using adapter cables from VW1594
connector test kit.

- Measure resistance to check for short circuit
between test box sockets 2 (Ground) and 75
(signal wire).


Test box sockets 2 and 75

Specified value:

- Switch multimeter to voltage (20 VDC)
measuring range.

- Switch ignition on.

- Check wiring for short circuit to B+.

Note voltage reading if applicable (if not 0
volts).
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24-148

Continuation (with measured voltage)

If measured voltage was approx. 5 volts:
If measured voltage was approx. battery positive voltage (B+): - Disconnect 8-pin harness connector from throttle valve control module
-J338-.
- Connect multimeter US1119 (Fluke 83 or equivalent), using adapter
cables from VW1594 connector test kit.
- Measure resistance to check for short circuit between test box sockets
62 (power supply) and 75 (signal wire).

Test box sockets 62 and 75
Specified value:
- Check wiring at 8-pin connector, terminal 5 for short circuit to battery
B+.
Pa
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.2

24-149

Continuation (with no measured voltage)

- Disconnect 8-pin harness connector from throttle
valve control module -J338-.

If wiring is OK: - Check wiring for open circuit between ECM/test box and 8-pin harness
connector.

Connector terminal 5 to ECM/test box socket 75
Specified value: max. 1.5
- Replace throttle valve control module -J338-.
- Carry out adaptation of throttle valve control module to ECM page
24
-150
.
- Check readiness code page 01
-70
. If Diagnostic Trouble Code
(DTC) memory has been erased, or ECM was disconnected, generate
new readiness code page 01
-73
.
Pa
ge 30 of 36 Throttle valve control module, checkin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.2