Volvo 819 E - Page 103

Group 28 I gnit i on systems
Fault tracing, R ex-'
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; :
o,,--t, <,' ;"T - 23
,
,
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146 117
N24
Check pulse generator
Measure resistance between connector terminals 10
(red) and
23 (blue).
Resistance shou
ld be approx. 240± 25 ohm.
F!
,.-------
,
•
•
' ~
23
1
•
,
11 ' :
•
•
.. _- _. .....
10
,
,
,
,
,
,
,
,
,
,
~ ~: :
1 44 811
,'
Check that screen is connected to terminal 11 .
Check knock sensor leads
Undo knock sensor connector and bridge terminals 1
and 2.
Measure resistance
between terminal 12 (black) and 13
(green) in
contro l unit connector. Resistance should be
o
ohm.
If resistance is too high ( QO ). one or both leads is faulty
(open-circuited). Remove jumper and measure each
lead separately
with ohmmeter. Replace damaged
lead(s).
If leads are intact. replace knock
se nsor. T ightening
torque 20± 5 Nm (15± 3.5 ft Ib).
Reconnect knock sensor connector.
N25
1
2
144 818
F!
1M.
3
<:::===5
2
Ht:
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n
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8j'
lW
144 819
1
1
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