1 Primary Oxygen Sensor (HO2S) (Sensor 1).
2 Rear Heated Oxygen Sensor.
3 Manifold Absolute Pressure Sensor (MAP).
4 Crankshaft Position Sensor (CKP).
5 Manifold Absolute Pressure Sensor (MAP).
6 Engine Coolant Temperature (ECT Sensor).
7 Throttle Position Sensor.
8 Top Dead Center Position Sensor (TDC).
9 No. 1 Cylinder Position Sensor (CYP).
10 Intake Air Temperature (IAT) Sensor.
12 Exhaust Gas Recirculation (EGR) System.
13 Barometric Pressure (BARO) Sensor
14 Idle Air Control (IAC) Valve.
15 Ignition Output Signal.
17 Vehicle Speed Sensor (VSS).
18 Ignition Timing Adjuster).