Question 1

A Magneride suspension system has magneto-rheological fluid in the shock absorbers.

Accepted Answer

A Magneride suspension system does have magneto-rheological fluid in the shock absorbers.

Question 2

While discussing a programmed ride control (PRC)   system:
A) The PRC system switches to the firm mode if  lateral acceleration exceeds 0:25 g.
B) The mode indicator light in the tachometer is  illuminated in the plush ride mode.
C) A PRC system switches from the auto mode to f irm mode if the vehicle accelerates with  90 percent throttle opening.
D) The brake system pressure must be 300 psi ( 2,068 kPa) before this mode change occurs.

Accepted Answer

C

Question 3

All of these statements about a rear load-leveling  suspension system are true EXCEPT:
A) If a door is open, the control module completes  the lower suspension height commands.
B) The rear suspension has one, non-serviceable  suspension height sensor.
C) The On/Off switch is mounted in the vehicle  trunk.
D) The control module operates the compressor  relay.

Accepted Answer

The control module will not complete the lower suspension height commands if a door is open, as it typically requires all doors to be closed to ensure safety and proper operation of the load-leveling system.

Question 4

Technician A says that in an electronic air suspension system with the ignition switch turned off for over 1 hour, the compressor run time is limited to 5 minutes for raise vehicle commands on the front springs. Technician B says if the brake pedal is applied when driving the car, raise vehicle commands are completed immediately. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Accepted Answer

Both statements are incorrect. The compressor run time and the behavior of raise vehicle commands are typically controlled by the vehicle's control module and may not operate as described by either technician.

Question 5

When the brakes are applied with the doors closed on a vehicle with an electronic air suspension system, the air suspension module ignores all requests from the height sensors.

Accepted Answer

This is because the electronic air suspension system prioritizes safety and redirects all available air towards the brakes to ensure effective stopping.

Question 6

CAN is currently the standard communication protocol.

Accepted Answer

CAN (Controller Area Network) is indeed currently the standard communication protocol used in automotive and other industrial applications.

Question 7

To sense the distance to the vehicle in front, an  adaptive cruise control system uses:
A) A Long-range radar signal
B) A video camera
C) A short-range radar signal
D) A digital camera

Accepted Answer

Adaptive cruise control systems typically use long-range radar signals to detect and maintain a safe distance from the vehicle in front.

Question 8

When removing an air spring valve with air pressure in the spring, rotate this valve to the fully released position.

Accepted Answer

When removing an air spring valve with air pressure in the spring, rotate it to the closed position to prevent the release of air before disconnecting.

Question 9

Technician A says that in an electronic air suspension system if the engine is running, the brake pedal applied, and a door is open, lower vehicle commands are completed immediately. Technician B says that in an electronic air suspension system if the engine is running and a command cannot be completed in 3 minutes, the suspension warning lamp is illuminated. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Accepted Answer

Technician B is correct. In an electronic air suspension system, if a command cannot be completed in 3 minutes, the suspension warning lamp is illuminated. Technician A's statement is incorrect as a door being open has no effect on the completion of lower vehicle commands in an electronic air suspension system.

Question 10

Computer-controlled suspension systems reduce body sway during fast acceleration.

Accepted Answer

Computer-controlled suspension systems can adjust the suspension in real time to reduce body sway during fast acceleration, providing a more stable and comfortable ride.

Question 11

On an automatic air suspension system, the front air spring and strut assemblies contain an actuator that varies strut firmness.

Accepted Answer

The actuator on the front air spring and strut assemblies in an automatic air suspension system does indeed vary strut firmness.

Question 12

In an electronic air suspension system, the control module operates all of these components EXCEPT:
A) Air spring valves
B) Compressor
C) Height sensors
D) Air vent valve

Accepted Answer

Height sensors are used to provide feedback to the control module but are not operated by it.

Question 13

If an electrical fault occurs in the Stabilitrak® system, STABILITY REDUCED is displayed in the driver information center (DIC) .

Accepted Answer

When an electrical fault occurs in the Stabilitrak® system, STABILITY REDUCED is displayed in the driver information center (DIC).

Question 14

To force air into an air spring on an electronic air suspension system, the compressor must be running and the air spring valve must be de-energized.

Accepted Answer

In an electronic air suspension system, to force air into an air spring, the compressor must be running, but the air spring valve must be energized (opened), not de-energized, to allow the flow of air into the spring.

Question 15

When both front and rear air springs require filling on a vehicle with an electronic air suspension system, fill the rear springs first.

Accepted Answer

This is because the rear springs typically have a larger air capacity and filling them first will create a stable base for the vehicle before filling the front springs.

Question 16

All these statements about air springs, shock absorbers,and struts are true EXCEPT:
A) Some air suspension systems have seven driver  selectable operating modes.
B) Air springs can be mounted separately from the s hock absorbers.
C) Air springs can be mounted over the front and  rear struts.
D) Some struts contain a solenoid actuator that  controls strut firmness.

Accepted Answer

Air suspension systems can have multiple selectable operating modes, but stating a specific number such as seven without context is not universally true for all systems. The capabilities and features of air suspension systems vary widely among different vehicle models and manufacturers.

Question 17

Technician A says that some networks contain terminators located at both ends of the network. Technician B says terminators are usually positioned inside some of the network computers. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Accepted Answer

Terminators are located at both ends of the network and inside some of the network computers.

Question 18

A hard fault code indicates a fault that occurs and then disappears.

Accepted Answer

A hard fault code indicates a fault that is currently present and requires further investigation or repair. It does not disappear on its own.

Question 19

After installing an air spring, there should only be one or two creases in the spring membrane.

Accepted Answer

When an air spring is properly installed, the spring membrane (or bellows) should not have any creases. Creases can indicate improper installation or a defect, and they can lead to premature failure of the air spring.

Question 20

Technician A says adaptive cruise control system uses a long-range radar sensor. Technician B says the lane departure warning system uses a video camera to measure lane markings. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Accepted Answer

Technician A is correct as the adaptive cruise control system uses a long-range radar sensor to detect the distance between the vehicle and the vehicle in front. 
Technician B is also correct as the lane departure warning system uses a video camera to detect lane markings and alert the driver if the vehicle is drifting out of its lane. Therefore, both Technicians A and B are correct.

Quiz 11: Computer Controlled Suspension Systems

A Magneride suspension system has magneto-rheological fluid in the shock absorbers.

While discussing a programmed ride control (PRC) system:

All of these statements about a rear load-leveling suspension system are true EXCEPT:

When the brakes are applied with the doors closed on a vehicle with an electronic air suspension system, the air suspension module ignores all requests from the height sensors.

CAN is currently the standard communication protocol.

To sense the distance to the vehicle in front, an adaptive cruise control system uses:

When removing an air spring valve with air pressure in the spring, rotate this valve to the fully released position.

Computer-controlled suspension systems reduce body sway during fast acceleration.

On an automatic air suspension system, the front air spring and strut assemblies contain an actuator that varies strut firmness.

In an electronic air suspension system, the control module operates all of these components EXCEPT:

If an electrical fault occurs in the Stabilitrak® system, STABILITY REDUCED is displayed in the driver information center (DIC) .

To force air into an air spring on an electronic air suspension system, the compressor must be running and the air spring valve must be de-energized.

When both front and rear air springs require filling on a vehicle with an electronic air suspension system, fill the rear springs first.

All these statements about air springs, shock absorbers,and struts are true EXCEPT:

Technician A says that some networks contain terminators located at both ends of the network. Technician B says terminators are usually positioned inside some of the network computers. Who is correct?

A hard fault code indicates a fault that occurs and then disappears.

After installing an air spring, there should only be one or two creases in the spring membrane.

Technician A says adaptive cruise control system uses a long-range radar sensor. Technician B says the lane departure warning system uses a video camera to measure lane markings. Who is correct?