Technician A says that a MAP sensor can be tested by visual inspection, using a digital meter, or a scan tool. Technician B says a light engine load results in low intake manifold vacuum and a high MAP sensor signal voltage. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because a MAP (Manifold Absolute Pressure) sensor can indeed be tested through visual inspection for any physical damage, using a digital multimeter to check for correct voltage or resistance, and with a scan tool to monitor the sensor's output in real-time. Technician B is incorrect because a light engine load actually results in high intake manifold vacuum and a low MAP sensor signal voltage, not the other way around.

Technician a Says That a MAP Sensor Can Be Tested