wiring diagram AUDI A4 1997 B5 / 1.G AEB Engine Technical Data Spark Plug

28-2

Camshaft Position (CMP) sensor -G40-,
checking


Required special tools and test equipment

VAG 1598/22 test box
Multimeter US 1119 (Fluke 83 or equivalent)
VW 1594 connector test kit
Wiring diagrams

Checking

- Disconnect 3-pin connector from Camshaft
Position -G40- sensor.

- Connect multimeter US 1119 (Fluke 83 or equivalent) to measure
voltage across CMP connector terminals 1 (B+) and 3 (Ground), using
adapter cables from VW 1594 connector test kit.
- Switch ignition on.
- Measure voltage between terminals 1 and 3.
Specified value: 4.5 volts minimum
- Switch ignition off.
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28-3
If voltage is OK:

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

- Check wiring for open circuit between ECM/test box and 3-pin harness
connector, according to wiring diagram.

Connector terminal 1 to ECM/test box socket 11
Connector terminal 2 to ECM/test box socket 76
Connector terminal 3 to ECM/test box socket 67
Specified value: max. 1.5
- Check wiring for short circuit between ECM/test box and 3-pin harness
connector, according to wiring diagram.

Connector terminal 2 to ECM/test box socket 11
Connector terminal 3 to ECM/test box socket 11
Connector terminal 3 to ECM/test box socket 76
Specified value:
Pa
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28-5

Knock sensor and knock sensor
system, checking


Required special tools and test equipment

VAG 1551/1552 Scan Tool (ST) with adapter
cable VAG 1551/3
VAG 1598/22 test box
Multimeter US 1119 (Fluke 83 or equivalent)
VW 1594 connector test kit
Wiring diagrams

Checking

- Connect VAG 1551/1552 Scan Tool (ST) and
press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (engine running at
idle) Page 01
-7 .
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block"
function 08, and press -Q- button to confirm input.
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28-8

Continuation

- Disconnect 3-pin connector from Knock Sensor
(KS) 1 -G61-.

If resistance is OK (no continuity): - Connect multimeter US 1119 (Fluke 83 or equivalent) to measure
resistance between connector terminals, using adapter cables from VW
1594 connector test kit.

Connector terminal 1 to terminal 2
Connector terminal 1 to terminal 3
Connector terminal 2 to terminal 3
Specified value:
- Connect VAG 1598/22 test box to Motronic ECM harness connector
Page 01
-56
.

- Check wiring for open circuit between ECM/test box and 3-pin harness
connector, according to wiring diagram.

Connector terminal 1 to ECM/test box socket 68
Connector terminal 2 to ECM/test box socket 67
Connector terminal 3 to ECM/test box socket 2
Specified value: max. 1.5
Pa
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park
plugs
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU02.28.1

28-10

- Disconnect 3-pin connector from Knock Sensor
(KS) 2 -G66-.

If resistance is OK (no continuity): - Connect multimeter US 1119 (Fluke 83 or equivalent) to measure
resistance between connector terminals, using adapter cables from VW
1594 connector test kit.

Connector terminal 1 to terminal 2
Connector terminal 1 to terminal 3
Connector terminal 2 to terminal 3
Specified value:
- Connect VAG 1598/22 test box to Motronic ECM harness connector
Page 01
-56
.

- Check wiring for open circuit between ECM/test box and 3-pin harness
connector, according to wiring diagram.

Connector terminal 1 to ECM/test box socket 60
Connector terminal 2 to ECM/test box socket 67
Connector terminal 3 to ECM/test box socket 2
Specified value: max. 1.5
Pa
ge 14 of 22 Technical data, s
park
plugs
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.28.1