Input Components
WARNING: This page is about a different car, the 2005 Chevrolet Optra5 and 2005 Chevrolet Optra. However, it is still accessible from the selected car via links, so may be relevant.
Input components are monitored for circuit continuity and out-of-range values. Input components are also tested for rationality. A rationality condition occurs when the signal from a sensor is not reasonable. For example, a throttle position (TP) sensor that indicates high throttle position at low engine loads, or manifold absolute pressure (MAP) voltage, will set a rationality DTC. Input components may include, but are not limited to, the following sensors:
- Vehicle speed sensor (VSS)
- Crankshaft position (CKP) sensor
- Throttle position (TP) sensor
- Engine coolant temperature (ECT) sensor
- Camshaft position (CMP) sensor
- Manifold absolute pressure (MAP) sensor
In addition to the circuit continuity and rationality check, the ECT sensor is monitored for its ability to achieve a steady state temperature to enable closed loop fuel control.