Volvo 819 E - Page 61

Group 28 Ign it io n systems
Design and function - System descriptions
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EZ-116K
Control unit connections
1. Transmits signals to diagnostic unit (482) during fault trac ing.
2. Receives analogue engine temp e ratur e signal from t emperature sensor (8 4 ).
4. Transmits knock- co ntroll ed fuel enrichment signal to fuel system con tr ol unit (4 721.
5. Receives power directly from battery (1).
6. Receives power from battery (1) across ignit i on sw itch (2) terminal 1 5.
7. Receives signal from throttle switch (198) when throttle is closed .
8.
Re ceives engine load signa l fr om ai r mass meter (284) via fuel system control uni t (472).
10 . Rece ives e ngin e speed and c ra nkshaft pos ition signal from speed/ po sition pic k- up ( 41 3).
11 . Ground s screen of lead from sp eed/ pos i ti on pick- up (413).
12.
Grounds screen of lead fr om knock sensor (2 18 ).
13 . Rece ives signa ls fr om kno ck se nsor \218).
16 . Trans mit s ig nition pulses to power stage (419 ).
1 7. Transmit s speed i nformati on to fuel system co ntr ol u nit (472).
20 . Grounds con trol unit (260).
23 . Re ceives engine spee d and crankshaft position signals fr om speed/ position pick-up (413).
Power stage connections
1. Contr ols pri mary current in ignition coil (4 ).
2. Grounds power s tag e ( 41 9).
3.
Grounds screen of lead from co ntr ol unit (260) t ermi nal 16.
4. Receives power from
battery (1) ac ross i gni tion swi t ch (2).
5. Receives igni tion pulses from con tro l unit (260).
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