wiring AUDI A6 2000 C5 / 2.G AEB Engine Throttle Valve Control Module And Checking

24-99


Throttle valve control module,
checking

Note:
If the throttle valve control module -J338- is
removed and installed, or replaced, adaptation of
the throttle valve control module to the Motronic
ECM is required Page 24
-119
.

Required special tools and test equipment

VAG 1551 or VAG 1552 Scan Tool (ST) with
VAG 1551/3 adapter cable
VAG 1598/22 test box
Multimeter US 1119 (Fluke 83 or equivalent)
VW 1594 connector test kit
Wiring diagrams
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Throttle valve control module power
supply, checking


If voltage is NOT OK: - Disconnect 8-pin harness connector from throttle valve control module
-J338-.
- Connect multimeter US 1119 (Fluke 83 or equivalent) between harness
connector terminals using adapter cables from VW 1594 connector test
kit.
- Switch ignition on, and check voltage. Specified values:

Connector terminals 3 and 7 (Ground): 9.0-14.5 volts
Connector terminals 4 and 7 (Ground): 4.0-6.0 volts
- Switch ignition off.
- Connect VAG 1598/22 test box Page 01
-56
.

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

Connector terminal 3 to ECM/test box socket 69
Connector terminal 4 to ECM/test box socket 62
Connector terminal 7 to ECM/test box socket 67
Specified value: max. 1.5
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- Check wiring for short circuit between ECM/test
box and 8-pin harness connector.


Connector terminal 7 to ECM/test box
socket 69

Connector terminal 7 to ECM/test box
socket 62

Connector terminal 4 to ECM/test box
socket 67

Specified value:

- Reconnect throttle valve control module harness
connector.
If wiring is OK:

- Replace Motronic Engine Control Module (ECM)
-J220- Page 01
-57
.

- Carry out adaptation of throttle valve control
module to ECM Page 24
-119
.

-
Check readiness code Page 01
-59
. If
Diagnostic Trouble Code (DTC) memory has
been erased, or ECM was disconnected,
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Continuation

- Switch ignition off.

- Connect VAG 1598/22 test box to ECM harness
connector Page 01
-56
.

- Connect multimeter US1119 (Fluke 83 or
similar) and check resistance between test box
sockets 67and 69.


Specified value: max. 5.0
-
Open throttle slowly. Specified value: If resistance is NOT OK:

- Disconnect 8-pin harness connector for throttle valve control module -
J338-.
- Check wiring for open circuit between ECM/test box and 8-pin harness
connector.

Connector terminal 3 to ECM/test box socket 69
Connector terminal 7 to ECM/test box socket 67
Specified value: max. 1.5
- Check wiring for short circuit between ECM/test box and 8-pin harness
connector.
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- Reconnect throttle valve control module harness
connector.
If wiring is OK:

- Replace throttle valve control module -J338-.

- Carry out adaptation of throttle valve control
module to ECM Page 24
-119
.

- Check readiness code Page 01
-59
. If
Diagnostic Trouble Code (DTC) memory has
been erased, or ECM was disconnected,
generate new readiness code Page 01
-62
.
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Continuation

- Switch ignition off.

- Connect VAG 1598/22 test box to ECM harness
connector Page 01
-56
.

- Switch ignition on.

- With throttle valve in closed throttle position,
connect multimeter US 1119 (Fluke 83 or
equivalent), and check resistance between
ECM/test box sockets 59 and 66.


Specified value: 3-200 If resistance is NOT OK:

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

- Check wiring for open circuit between ECM/test box and 8-pin throttle
valve control module harness connector.

Connector terminal 1 to ECM/test box socket 66
Connector terminal 2 to ECM/test box socket 59
Connector terminal 7 to ECM/test box socket 67
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- Check wiring of 8-pin connector for short circuit
between wires, according to wiring diagram.


Connector terminal 1 to ECM/test box
socket 59

Connector terminal 1 to ECM/test box
socket 74

Connector terminal 1 to ECM/test box
socket 67

Connector terminal 2 to ECM/test box
socket 67

Connector terminal 2 to ECM/test box
socket 74

Connector terminal 7 to ECM/test box
socket 74

Specified value:
If wiring is OK:

- Carry out adaptation of throttle valve control
module to ECM Page 24
-119
.
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Display group: 3


Display field: 3
Possible cause
Corrective action
0.0
Open circuit in wiring- Check wiring Page 24
-116
99.0
Short circuit to ground (GND)
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Checking wiring

- Connect VAG 1598/22 test box to ECM harness
connector Page 01
-56
.

- Connect multimeter US 1119 (Fluke 83 or
equivalent), using adapter cables from VW 1594
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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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 US 1119 (Fluke 83 or equivalent), using adapter
cables from VW 1594 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+.
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