Engine and Emission Control System

GENERAL DESCRIPTION
The engine and emission control system has 4 major subsystems: air intake system, fuel delivery system, electronic control system and emission control system.

Air intake system includes air cleaner, mass air flow sensor, throttle body, idle air control valve and intake manifold.

Fuel delivery system includes fuel pump, delivery pipe, fuel pressure regulator, fuel injectors, etc.

Electronic control system includes ECM (PCM), various sensors and controlled devices.

Emission control system includes EVAP and PCV systems.

J20 Engine:

1. Air cleaner
2. Intake air temp. sensor
3. Mass air flow sensor
4. EVAP canister purge valve
5. Throttle position sensor
6. Idle air control valve
7. Throttle body
8. Intake manifold
9. Camshaft position sensor
10. EGR valve
11. Fuel injector
12. Engine coolant temp. sensor
13. PCV valve
14. Ignition coil assembly
15. Heated oxygen sensor-1
15-1. Warm up the way catalytic converter (if equipped)
15-2. Heated oxygen sensor-2 (Vehicle equipped with WU-TWC)
15-3. Heated oxygen sensor-2 (Vehicle not equipped with WU-TWC)
15-4. Crankshaft position sensor
16. Three way catalytic converter
17. Fuel pump with fuel level sensor
17-1. Fuel tank pressure sensor
18. Fuel feed line
19. Fuel filter
20. Fuel pressure regulator
21. Fuel return line
22. Tank pressure control valve
23. EVAP canister
23-1. EVAP canister air valve
23-2. Tank pressure control solenoid valve (without ORVR system)
24. ECM/PCM (Engine control module/ Powertrain control module)
25. Malfunction indicator lamp ("SERVICE ENGINE SOON" light)
26. Electric load (a) (rear defogger (if equipped), Lighting (M/T))
27. Power steering pressure switch (if equipped)
28. Heater blower fan switch
29. Manifold absolute pressure sensor
30. Blank
31. Blank
32. Blank
33. Vehicle speed sensor
34. Combination meter
35. A/C condenser fan relay (if equipped)
36. A/C control module (amplifier) (if equipped)
37. Data link connector
38. ABS control module (if equipped)
39. Main relay
40. Main switch
41. Clutch pedal position switch (M/T) or Park/Neutral position switch in Transmission range switch (A/T)
42. Battery
43. Starter magnetic switch
44. "O/D OFF" lamp (A/T)
45. "POWER" lamp (A/T)
46. Lighting switch (A/T)
47. Stop lamp switch (A/T)
48. O/D cut switch (A/T)
49. POWER/NORMAL change switch (A/T)
50. 4WD low switch (A/T)
51. Transmission range switch (A/T)
52. Shift solenoid valve A (A/T)
53. Shift solenoid valve B (A/T)
54. TCC solenoid valve (A/T)
55. A/T input speed sensor (A/T)
56. A/T vehicle (output) speed sensor (A/T)
57. Cruise control module (if equipped)