Volvo 819 E Service Manual page 61

1
EZ-116K
Control unit connections
1. Transmits signals
2. Receives analogue engine
4. Transmits knock-co
5. Receives power di
6. Receives power from
7. Receives signal from throttle switch
8. Receives engine load
10. Receives engin e speed
11 . Grounds screen of
12. Grounds screen of
13. Receives signals from
16. Transmits ig nition
17. Transmits speed information
20. Grounds con trol unit
23. Receives engine speed
Power stage connections
1. Controls p r imary current
2. Grounds power stage
3. Grounds screen of
4. Receives po w er fro m
5. Receives ignition pulses from
t o diagnostic unit (482)
temperature signal
ntrolled fuel enrichment
rectly from battery (1).
battery (1) across ignition
(198)
signal from ai r mass meter
and cra nkshaft position
lead from speed/position
lead from knock senso
knock sen so r \218).
pulses to power stage (419).
to fuel system control u
(260).
and cranksha ft position
in ignition coil (4).
(41 9).
lead from control unit (260)
battery (1) across ignit
control unit
Design and function
,
•
,
413
•
•
,
during fault tracing.
from t emperature
signal to fuel system
switch (2) terminal
when throttle is closed.
(284) via f uel system control
signal from speed/position pick-up
pick-up (413).
r (2 18).
(472).
sig nal s from speed/position
t ermi na l 16.
ion swit ch (2).
(260).
Group 28
- System descriptions
•
•
•
o
,
,
sensor (84).
con trol unit (4721.
15.
unit (472).
(41 3).
p ick-up (413).
Igni tio n systems
.
59