Diagnostics of fuel injection systems (Discovery 1)

1 - crankshaft position sensor, 2 - diagnostic connector (on the right under the dashboard), 3 - electronic control unit (right), 4 - engine management system relay (right), 5 - coolant temperature sensor, 6 - fuel vapor accumulator valve, 7 - fuel filter (behind the chassis), 8 - fuel pump - in the fuel tank, 9 - fuel pump relay (on the right), 10 - fuel temperature sensor, 11 - heated oxygen sensor (on the exhaust pipes), 13 - ignition system amplifier, 14 - ignition coils, 15 - inertial fuel supply switch. 16 - fuel injection system injectors, 17 - air flow meter, 18 - neutral position selector resistance (in the wiring harness), 19 - Electronic control unit coding plug (on the right side of the instrument panel), 20 - automatic transmission "park"/"neutral" switch, 21 - throttle position sensor, 22 - vehicle speed sensor.