Deck 115: Electronic Suspension Systems

Question 1

What type of sensor is used as a height sensor on vehicles equipped with an electronically controlled suspension?

A)Potentiometer
B)Photo cell
C)Hall-effect
D)All of the above

Answer 1

All of the above

Question 2

Which sensors do most vehicles use if equipped with electronic suspension?

A)Steering wheel position sensors
B)Height sensors
C)Lateral accelerometer sensors
D)All of the above

Answer 2

All of the above

Question 3

A lateral acceleration sensor is used to provide the suspension control module with feedback regarding ________ force.

A)Acceleration
B)Braking
C)Cornering
D)All of the above

Answer 3

Cornering

Question 4

A steering wheel position sensor is being discussed. Technician A says that the sensor is used to determine the direction of the steering wheel. Technician B says that the sensor detects how fast the steering wheel is turned. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 5

Technician A says that an electronic control module used in the suspension system is the same as that used for engine control. Technician B says that most electronically controlled suspension systems use a separate electronic control module. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 6

What type of actuator is used on electronically controlled suspensions?

A)Electric motor
B)Solenoid
C)Either A or B
D)Neither A nor B

Question 7

Why is the typical rear load-leveling system connected to the ignition circuit?

A)To prevent the system from working unless the ignition key is on
B)To keep the system active for a given time after the ignition is switched off
C)To keep the compressor from running for an extended period of time
D)All of the above

Question 8

Which sensor can be tested by unbolting the sensor and, with the ignition on, engine off (KOEO), looking at the scan tool data?

A)Vehicle speed sensor
B)Wheel speed sensor
C)Suspension sensor
D)"G" sensor

Question 9

The firm setting is usually selected by the electronic suspension control module whenever which of the following occurs?

A)High speed
B)Rapid acceleration
C)Rapid braking
D)All of the above

Question 10

Which of the following is the LEAST likely sensor to cause an electronic suspension fault?

A)Steering wheel position sensor
B)Yaw sensor
C)Throttle position sensor
D)Vehicle speed sensor

Question 11

Two technicians are discussing electronic leveling systems. Technician A says that a weight should be placed in the vehicle as part of the diagnostic procedure. Technician B says that many ride height sensors are adjustable. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 12

Two technicians are discussing electronic leveling systems. Technician A says battery power may be applied directly to the compressor. Technician B says most leveling systems use adjustable sensors. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 13

Which of the following is NOT considered an input for the suspension ECM?

A)Sensor
B)Photocell
C)Electric motor
D)Switch

Question 14

Technician A says that a potentiometer returns a digital signal to the ECM. Technician B says that a potentiometer generally has a two terminal harness connected to it. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 15

What term describes an electrical device controlled by an electronic module that performs some kind of mechanical action?

A)Actuator
B)Driver
C)Activator
D)None of these

Question 16

Typically, a vehicle height sensor mounts to the body of the vehicle and is connected to the ________ by a lever.

A)Lower control arm
B)Upper control arm
C)Frame
D)None of these

Question 17

Technician A says that comparing the front vehicle height sensors to the rear sensors allows the ECM to determine body roll created by cornering force. Technician B says that vehicle height sensors are only located on the rear. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 18

Technician A says that comparing height sensors from side to side allows the ECM to calculate acceleration force. Technician B says that only Hall-effect sensors are used as height sensors. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 19

Technician A says that some GM vehicles have only one height sensor. Technician B says that GM vehicles may have up to four height sensors. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 20

How many wires are used with a potentiometer-type sensor?

A)Three
B)Four
C)One
D)Two

Question 21

What type signal is produced by a potentiometer?

A)Analog
B)Pulse width modulated
C)Digital
D)None of these

Question 22

Where is the steering wheel sensor typically located?

A)At the base of the steering column
B)Near the steering gear
C)At the center of the steering wheel, under the airbag
D)None of these

Question 23

Which sensor provides input regarding cornering forces?

A)Lateral accelerometer
B)Potentiometer
C)Yaw sensor
D)None of these

Question 24

All of these are modes available with the selectable ride (SR) system EXCEPT ________.

A)Performance
B)Tour
C)Sport
D)All of the above are available modes

Question 25

Which type of actuator uses an electromagnetic plunger to open and close a passage or move a linkage?

A)LED
B)Transistor
C)Relay
D)Solenoid

Question 26

Two technicians are discussing the length of an actuators' duty cycle. What type signal are they most likely discussing?

A)Analog
B)AC current
C)Pulse width modulation
D)None of these

Question 27

A bi-state damper uses an electrical actuator instead of a solenoid.

Question 28

In this schematic of an automatic leveling system, how is the compressor turned on?

A)A power signal from the control
B)A ground signal from the control
C)Both of these
D)Neither of these

Question 29

In this diagram the RIM turns the ALC compressor ON by ________.

A)Sending power to the relay coil
B)Grounding the ALC compressor wire
C)Grounding the relay coil
D)Not enough information

Question 30

Refer to the diagram. Technician A says that the ELC fuse supplies power to the RIM. Technician B says that an open circuit at the splice pack will prevent the relay from working. Which technician is correct?

A)Technician A only
B)Neither technician A nor B
C)Technician B only
D)Both technicians A and B