Volvo 819 E Service Manual page 52

EZ-117K
Control unit connections
3. Supplies fault indication signals
4. Supplies power to Hall generator
6. supply from
7. Grounded by throttle
8. Receives load signal
9. Receives 12 V su pply
10. Ground s screen of
12. Grounds screen of
13. Receives signal from knock
15. Transmits knock.controtled
16. Transm its ignit ion pulses
17. Transm its speed signa
20. Grounds control unit
24. Receives engine speed/crankshaft posit ion
Power
stage connections
1. Controls current in ignition
2. Grounded.
3. Grounds screen of lead
4. Receives powe r from
5. Receives ignition pulses
50
to test term
in distributor
battery across ignition switch (2).
(1)
switch (198) when throttle
from fuel system (LH-2.2) control
when thermostat (224) closes
lead from Hal l generat
lead from knock sensor
sensor /2181.
fuel enrichment signal
to power stage
l to fuel system (lH-2.2) control unit (217
(2601.
coil (4) primary w inding
connect ed to t erminal 5.
battery (1) across ignition switch (2).
from con trol unit
inal (267) when test diode is connected
(5).
is closed .
unit (217).
(B 230 FT only
or in distributor (5).
(218).
to injection system control un
(4191.
signal from Hall generator in distributor
.
(260).
.
),
it (217) (B
(5).
230 FT only).