System Inputs

In order for the ECA to properly control engine operation, it must first receive correct status reports on various operating conditions, which are as follows:
1. Crankshaft position.
2. Throttle plate position.
3. Engine coolant temperature.
4. Exhaust gas oxygen level.
5. Air intake volume/temperature.
6. A/C--ON or OFF.
7. Transmission or transaxle load or no-load.
To monitor these conditions, inputs to the system are provided by the following:
1. Profile ignition pickup (PIP), which replaces the crankshaft position sensor.
2. Throttle position sensor (TPS).
3. Engine coolant temperature sensor (ECT).
4. Exhaust gas oxygen sensor (EGO).
5. Vane airflow (VAF) and vane air temperature sensor (VAT) located in the vane meter.
6. A/C clutch compressor signal (ACC).
7. Neutral start switch (on automatic transaxle models) or clutch switch and transaxle neutral switch (on manual transaxle models).
8. Neutral forcing relay (on automatic transaxle models only).