Exam 12: Instrumentation and Warning Lampsinstrumentation and Warning Lamp System Diagnosis and Repair

On most vehicles, oil pressure changes are monitored by a piezoresistive sensor.

What type of symbols are used to represent the gauge function on electronic instrument panels?

The computer-driven instrument cluster uses a microprocessor to process information from various sensors and to control the ____.

The sending unit is the ____ for the gauge.

Technician A says a ground in the circuit between the indicator light and the pressure switch could cause the oil pressure light to stay on when the engine is running. Technician B says an open in the pressure switch could cause the oil pressure light to stay on. Who is correct?

A vehicle's electronic digital fuel gauge is always indicating a full tank. All of the other instrument gauges are operating correctly. Which of the following is the most likely cause of this problem?

What is the purpose of the instrument voltage regulator (IVR)?

What are the most common types of displays used on electronic instrument panels?

What is "pinion factor?"

What usually controls an oil pressure warning lamp?

Technician A says when testing a system using an IVR, use a voltmeter to test for regulated voltage at a common point. Technician B says if regulated voltage is within specifications, you must replace the printed circuit board. Who is correct?

Digital instrument clusters use digital and ____ displays to notify the driver of monitored system conditions.

Technician A says a conventional analog instrumentation is more accurate than a digital instrumentation. Technician B says a digital instrumentation displays an average of the readings received from the sensor. Who is correct?

Technician A says if all gauges are not operating, check the fuse. Technician B says only one gauge will be affected if the instrument cluster ground is open. Who is correct?

Unlike gauge sending units, the sending units for a warning light are nothing more than simple ____.

Technician A says in most electromagnetic gauges, if the sending unit resistance is low, the gauge will read low. Technician B says in most bimetallic gauges, if the sending unit resistance is low, the gauge will read high. Who is correct?

In most vehicles equipped with a digital fuel gauge, as the fuel level decreases what will happen to the fuel sender resistance?

Federal and state laws prohibit changing the correct mileage on the odometer.

Electromagnetic gauges produce needle movement by magnetic forces instead of ____.

A(n) ____ is an instrument that measures the speed of the engine in revolutions per minute (rpm).