Fuel injection system.
1 - oxygen sensor,
2 - absolute pressure sensor in the intake manifold,
3 - coolant temperature sensor,
4 - knock sensor,
5 - crankshaft position sensor,
6 - intake air temperature sensor,
7 - camshaft position sensor (TDC sensor),
8 - ignition coil (intake side) (L13A),
9 - ignition coil (from the exhaust side),
10 - idle speed control valve,
11 - throttle body,
12 - nozzle,
13 - pulsation damper,
14 - fuel filter,
15 - pressure regulator,
16 - fuel pump,
17 - fuel tank,
18 - air filter,
19 - EGR valve,
20 - crankcase ventilation system valve,
21 - catalytic converter,
22 - fuel vapor recovery system valve,
23 - fuel vapor recovery system filter,
24 - fuel cut-off valve,
25 - fuel vapor recovery system filter valve.
(Publication reprinted from the website HondaBook)