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It is normal for some electromagnetic gauges to remain at their last position when the ignition is turned off.

A) True
B) False

Correct Answer

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True

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

A) True
B) False

Correct Answer

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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?


A) Excessive resistance in the cluster power supply circuit .
B) Faulty cluster ground circuit .
C) Shorted fuel gauge sender unit .
D) High resistance in the fuel gauge sender circuit .

E) B) and D)
F) C) and D)

Correct Answer

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Electromagnetic gauges use heat to produce needle movement.

A) True
B) False

Correct Answer

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False

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

A) True
B) False

Correct Answer

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All of the following statements concerning gauge sending units are true EXECPT:


A) A gauge can use a switch as a sensor.
B) A gauge can use a thermistor as a sensor.
C) A gauge can use a piezoresistive sensor.
D) A gauge can use a variable resistor as a sensor.

E) A) and C)
F) A) and B)

Correct Answer

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A

If equal voltage is applied to both sides of a lamp, the lamp remains off because current cannot flow.

A) True
B) False

Correct Answer

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An electronically controlled instrument cluster is being diagnosed for no speedometer operation. Which of the following statements is most correct?


A) If the BCM and/or cluster module passes it's self-test, the fault is probably in the vehicle speed sensor circuit.
B) If the speedometer does not work but the odometer does, then the problem is probably in the vehicle speed sensor circuit.
C) If the speedometer fails to move during the self-test, the problem is probably in the vehicle speed sensor circuit.
D) All of these choices.

E) A) and C)
F) A) and D)

Correct Answer

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Which of the following is NOT contained in a three coil gauge?


A) A bucking coil .
B) A low-reading coil .
C) A high-reading coil .
D) A non-reading coil .

E) A) and B)
F) A) and C)

Correct Answer

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The tachometer receives its signal from the positive side of the ignition coil.

A) True
B) False

Correct Answer

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Before replacing the fuel gauge sender unit, clean the ground connections and test for proper operation.

A) True
B) False

Correct Answer

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What usually controls an oil pressure warning lamp?


A) Voltage drop .
B) A grounding switch .
C) A grounding sensor .
D) Any of these choices .

E) A) and C)
F) C) and D)

Correct Answer

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Equal pressure in both sides of a split brake hydraulic system will cause the brake warning light to come on.

A) True
B) False

Correct Answer

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In a conventional instrument cluster, all of the gauges are inoperable. What is the LEAST likely cause of this?


A) Faulty IVR.
B) Blown fuse.
C) Shorted sending unit.
D) Faulty printed circuit.

E) A) and C)
F) B) and C)

Correct Answer

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The oil pressure warning light will not turn off with the engine running. A shop gauge confirms good oil pressure. What is the most likely cause?


A) Faulty IVR.
B) Damaged printed circuit board.
C) Open in the wire to the oil pressure switch.
D) Short to ground in the wire to the oil pressure switch.

E) C) and D)
F) B) and D)

Correct Answer

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Which of the following is NOT true about a quartz analog speedometer system?


A) The signal from the PM generator is a DC frequency.
B) The signal from the vehicle speed sensor is modified by the VSS buffer.
C) This system uses an A/D converter.
D) The signal from the vehicle speed sensor is an AC voltage.

E) None of the above
F) B) and C)

Correct Answer

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Before removing the instrument panel, always disconnect the battery negative cable.

A) True
B) False

Correct Answer

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The speedometer displays a speed based on an electrical signal from an output shaft speed sensor.

A) True
B) False

Correct Answer

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