Question 1

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

Accepted Answer

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. 
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. A

Question 2

Electromagnetic gauges use heat to produce needle movement.

Accepted Answer

A) True 
 B)False  False

Question 3

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

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

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. 
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.

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

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. 
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.

Question 8

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?

Accepted Answer

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. 
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.

Question 9

What usually controls an oil pressure warning lamp?

Accepted Answer

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

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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?

Accepted Answer

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 . 
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 .

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

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

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

Electromagnetic gauges use heat to produce needle movement.

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

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

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

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

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

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?

What usually controls an oil pressure warning lamp?

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

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

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

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

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?

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

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

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

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

Introduction to Automotive Electrical and Electronic Systems Safety

Basic Theories Special Tools and Procedures

Electrical and Electronic Components Basic Electrical Troubleshooting and Service

Wiring and Circuit Diagrams Wiring Repair and Reading Circuit Diagrams

Automotive Batteries Battery Diagnosis and Service

Starting Systems and Motor Designs Starting System Diagnosis and Service

Charging Systems Charging System Testing and Service

Lighting Circuits Lighting Circuits Repair and Diagnosis

Introduction to the Body Computer Body Computer System Diagnosis

Computer Input Sensor Diagnostic Routines

Vehicle Communication Networks Vehicle Multiplexing Diagnostics

Advanced Lighting Circuits Advanced Lighting Systems Diagnosis and Service

Accessories Electrical Accessories Diagnosis and Repair

Radio Frequency and Infotainment Systems Servicing Radio Frequency and Infotainment Systems

Passive Restraint Systems Servicing Passive Restraint Systems

Vehicles With Alternative Power Sources Hybrid and High-Voltage System Service

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Exam 13: Instrumentation and Warning Lamps and Warning Lamp System Diagnosis and Repair

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

Electromagnetic gauges use heat to produce needle movement.

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

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

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

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

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

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?

What usually controls an oil pressure warning lamp?

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

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

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

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

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?

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

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

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

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

Introduction to Automotive Electrical and Electronic Systems Safety

Basic Theories Special Tools and Procedures

Electrical and Electronic Components Basic Electrical Troubleshooting and Service

Wiring and Circuit Diagrams Wiring Repair and Reading Circuit Diagrams

Automotive Batteries Battery Diagnosis and Service

Starting Systems and Motor Designs Starting System Diagnosis and Service

Charging Systems Charging System Testing and Service

Lighting Circuits Lighting Circuits Repair and Diagnosis

Introduction to the Body Computer Body Computer System Diagnosis

Computer Input Sensor Diagnostic Routines

Vehicle Communication Networks Vehicle Multiplexing Diagnostics

Advanced Lighting Circuits Advanced Lighting Systems Diagnosis and Service

Accessories Electrical Accessories Diagnosis and Repair

Radio Frequency and Infotainment Systems Servicing Radio Frequency and Infotainment Systems

Passive Restraint Systems Servicing Passive Restraint Systems

Vehicles With Alternative Power Sources Hybrid and High-Voltage System Service

Filters