Volvo 819 E - Page 56

Group 28 Ignition sys t ems
D esign and function - System descript ions
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Control unit connections
3. Supplies fault indication signals to test terminal (267) when test diode is con nected.
4.
Supplies power to Hall generator in distributor (5 ).
6. Receives supply from battery (1) across ignition switch (2).
7.
Grounded by idling swi tch (272) when throttle is closed.
9. Receives 12 V supply from AC pre ss ure switch (8 1) and/or idling compensation relay (293).
10.
Grounds Hall generator in distributor (5).
11 . Grounds temperature sensor (273) (B 230 K only) .
12 . Grounds kno ck se nsor (2 18) term inal 2.
13 . Receives signa ls from knock sensor (218 ).
14 . Grounds fuel c ut -o ff solenoid valve (271) ( B230K only) .
16 . Supplies ignition pulses to power sta ge (419) term in alS .
20.
Grounds con trol unit (260 ).
24. Receives engine sp ee d/cran k shaft position signal from Hall gene rat or in distr i butor (5).
25 . Receives engine temperature signal from temperature sensor (273).
Power stage connect i ons
1. Controls cu rrent in i gnition coil (4) pr im ary w i nding .
2.
Grounded .
3.
Grounds screen of lead connec ted to term i nalS .
4.
Re ceives pow er from battery (1) across ignit ion switch (2 ).
5. Receives ig nition pu lses from co ntrol unit (260).
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