Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .
Circuit Description
Manifold Absolute Pressure (MAP) sensor measures changes in intake manifold pressure (vacuum). A low voltage signal, about 2 volts, is sent to PCM on signal circuit at closed throttle (high vacuum) idle. A high voltage signal, about 4 volts, is sent at wide open throttle (low vacuum).
Conditions required to set DTC are
- No TP sensor related DTCs present.
- Engine running.
- TP angle greater than zero percent with engine speed less than 1000 RPM, or greater than 6 percent with engine speed at greater than 1000 RPM.
- MAP sensor signal voltage less than 0.1 volt.
- Listed conditions present for greater than 58 crankshaft revolutions.