Volvo 819 E - Page 52

EZ-117K
Control unit connect i ons
3. Supplies fault indication signals to test term inal (267) when test di ode is connected.
4.
Supplies power to Hall generator in distributor ( 5) .
6.
Receives supply from battery (1) across igni ti on switch (2).
7.
Grounded by throttle swi t ch (198) when throttle is closed.
8. Re ceives load signal from fuel system (L H-2.2) cont rol unit (217).
9. Receives 12 V su pply when thermostat (224) closes (B 230 FT on ly ),
10 . Groun ds sc reen of lead fr om Hall gene rat or in distributor (5).
12.
Grounds sc reen of lead from knock sensor (218).
13 . Rece ives signal from knock sensor /2181.
15 . Transmits knock.controtled fuel enrichment signal to inj ection system control un it (217) (B 230 FT on l y) .
16 . Transmi ts ign iti on pulses to power stage (4191 .
17 . Transmi ts speed signa l to fuel system ( lH -2.2) control unit (217 ).
20 . Grounds control unit ( 2601 .
24. Receives
engine speed/crankshaft pos ition signa l from Hall generator in di stributor ( 5) .
Power stage connections
1. Controls current in i gnition co il (4) primary w i nding .
2. Gr
ounded .
3. Grounds screen of lead connec ted to t erminal 5.
4. Receives p owe r from battery (1) across ignition switch (2).
5. Receives igni ti on pulses fr om con tr ol unit (260).
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