Input & Output System Operation

1. Profile ignition pickup (PIP) is located in the distributor and supplies ECA signals for the tachometer and crankshaft position. The output signals affected are as follows:
a. Spark timing.
b. Air/fuel ratio.
c. DC motor idle speed control (ISC).
d. EGR valve operation.
e. Canister purge valve (CANP) operation.
f. Intake manifold heat control valve.
g. Exhaust heat control valve on Mustang and Capri models.
2. The throttle position sensor (TPS), transmits signals to the ECA for throttle position (open or closed). The output signal affected are as follows:
a. Selects operating modes (closed, part throttle or wide open throttle).
b. Fuel enrichment at wide open throttle.
c. Additional spark advance during wide open throttle applications.
d. Stops canister purge during wide open throttle, deceleration and at idle.
e. Cold start kickdown.
f. By-passes thermactor air during wide open throttle and deceleration.
g. Exhaust heat control valve operation.
h. Wide open throttle, A/C cut-OFF relay on Mustang, Capri, Continental and Mark VII models only.
3. The engine coolant temperature sensor (ECT), provides an engine coolant temperature signal. The output signals affected on V6-232 engines are as follows:
a. Air/fuel ratio and idle speed.
b. Accelerator pump enrichment.
c. Canister purge valve and EGR valve control.
d. Thermactor air control.
e. Intake manifold heat valve control.
f. Exhaust heat valve control on Mustang and Capri models only.
4. The engine coolant temperature sensor (ECT), provides an engine coolant temperature signal. The output signals affected on V8-302 engines are as follows:
a. Air/fuel ratio and idle speed (throttle kicker).
b. EGR valve control.
c. Exhaust heat valve and canister purge control.
d. Thermactor air control.
e. Spark timing.
5. The idle tracking switch (ITS) is used on V6-232 engines and is located on the end of the idle speed control motor. When the switch is opened by the throttle lever, the ECA receives a closed throttle signal. The output signals affected are as follows:
a. DC motor idle speed control (ISC).
b. Thick film ignition.
c. Thermactor air control.
d. Air/fuel ratio.
6. The dual exhaust gas oxygen sensor (EGO) is used on V6-232 engines and is threaded in each exhaust manifold. These sensors measure the oxygen content in the exhaust gas. The output signals affected are as follows:
a. Fuel injectors.
b. Thermactor air control.
7. The single exhaust gas oxygen sensor (EGO) is used on V8-302 engines and is threaded into the exhaust manifold. This sensor measures the oxygen content in the exhaust gas. The output signals affected are as follows:
a. Fuel injector pulse width.
b. Air/fuel ratio during closed loop operation.
c. Thermactor air control.
8. The air charge temperature sensor (ACT), measures the air temperature entering the engine. The output signals affected are as follows:
a. Air/fuel ratio.
b. Spark timing.
c. Intake manifold heat valve control on V6-232 engines only.
9. A/C compressor clutch. With the A/C-ON, the ECA will receive signals every time the clutch is engaged. The output signals affected are as follows:
a. DC motor idle speed control (ISC) on V6-232 engines.
b. Throttle kicker on V8-302 engines.
10. The knock sensor, used on V6-232 engines supplies the ECA with a detonation signal. The output signal affected is spark timing.
11. The manifold absolute pressure sensor (MAP), provides signals related to engine load and barometric pressure (altitude). The output signals affected on V6-232 engines are as follows:
a. DC motor idle speed control (ISC).
b. Air/fuel ratio.
c. Thermactor air control.
d. Spark timing and EGR flow.
e. Canister purge valve (CANP) control.
f. Intake manifold heat valve control.
g. Exhaust heat valve control on Mustang and Capri models only.
12. The manifold absolute pressure sensor (MAP), provides signals related to engine load and barometric pressure (altitude). The output signals affected on V8-302 engines are as follows:
a. Throttle kicker control.
b. Air/fuel ratio.
c. Thermactor air control.
d. Spark timing and EGR flow.
13. The EGR position sensor (EPS), indicates EGR valve position. The ECA converts EGR valve position to EGR flow rate (control). The output signals affected are as follows:
a. EGR valve control.
b. Air/fuel ratio.
c. Spark timing (adds spark during EGR flow).