wiring AUDI A4 1998 B5 / 1.G APB Engine Ignition System Checking

28-44

Knock Sensor (KS) 1 -G61 (Bank 1)
3-pin connector on
wiring harness, socket
VAG1598/31 test
box, socket
1 (Ground (GND)) 99
2 (signal) 106
3 (shielded) 108
Knock sensor (KS) 2 -G66 (Bank 2)
3-pin connector on
wiring harness, socket
VAG1598/31 test
box, socket
1 (Ground (GND)) 99
2 (signal) 107
3 (shielded) 108

Resistance in wiring: max. 1.5 ohm

- Repair any open/short circuit as necessary.
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p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.FU04.28.1

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Checking signal wire for Hall sensor
Checking Ground (GND) wire for Hall sensor: - Connect multimeter (Fluke 83 or equivalent) (voltage measurement
range) between engine Ground (GND) and socket 1 of connector.
Specified value: approx. 5 V
- Connect multimeter (Fluke 83 or equivalent) (voltage measurement
range) between engine Ground (GND) and socket 2 of relevant
connector.
Specified value: approx. battery voltage
- Connect VAG1598/31 test box to wiring harness for engine control
module. Do not connect to the engine control module itself Page 24
-
20
.

- Connect multimeter (Fluke 83 or equivalent) (resistance measurement
range) between socket 3 on connector and engine Ground (GND).
Specified value: Continuity
Resistance in wiring: max. 1.5 Ohms
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11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU04.28.1

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If all specifications are reached but the diode test
lamp does not flash (measurement taken
between terminals 1 and 2 without unplugging
connector and while operating starter):

- Replace relevant Hall sensor.
If specifications are obtained:

- Check wiring.

Checking wiring between hall sensor and
engine control module

- Connect VAG1598/31 test box to wiring harness
for engine control module. Do not connect to the
engine control module itself Page 24
-20
.

- Check wiring connection from Hall sensor to engine control module for
open circuit and/or short circuit to B+ or Ground (GND).
Pa
ge 55 of 64 I
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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.FU04.28.1

28-49

Camshaft Position (CMP) Sensor 2 -G163
(Bank 2)
3-pin connector on
wiring harness, socket
VAG1598/31 test
box, socket
1 (B+) 98
2 (signal) 86
3 (Ground (GND)) 108
Camshaft Position (CMP) Sensor 1 -G40 (Bank
1)
3-pin connector on
wiring harness, socket
VAG1598/31 test
box, socket
1 (positive) 98
2 (signal) 87
3 (Ground (GND)) 108

Resistance in wiring: max. 1.5 ohm

- Repair any open/short circuit as necessary.
Pa
ge 56 of 64 I
gnition s
ystem, 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.FU04.28.1