WorksheetsBrakes and Handling Day 2
Total questions: 15
Worksheet time: 8mins
Why do ABS modules use redundant microprocessors?
To compare and validate data
To process data more quickly
To handle more data
To compare and select the best data to use
Select all that apply. The ABS light remains on after its brief self-test during startup. What does it mean?
There is a fault stored, but ABS will intervene during certain traction events
The conventional braking system will have reduced functionality
There is a fault stored, and ABS will not intervene during traction events
The conventional braking system remains fully operational
Understeer occurs when the vehicle turns abruptly and cannot be corrected even though the driver attempts to turn the vehicle straight again
True
False
Oversteer occurs when the front wheels continue to travel in a straight line even though the rear wheels are moving.
True
False
Select all that apply. Which are true about progressive steering?
It has a more powerful electric motor
It has different sized straight-cut teeth to vary steering travel
It has fewer teeth to increase steering travel at lesser steering angles
It has variable teeth on the steering rack
A customer states that the ASR/ESC lamp flashed briefly last week on a curvy road, but there are no faults stored. What is the most likely cause?
The ABS module is faulty because it didn't store faults
The ESC module is faulty because it didn't store faults
There was a traction event and the system operated normally
There are mismatched tires on the drive axle(s)
A customer states that when using the electro-mechanical parking brake, the light in the switch turns off after about 30 seconds when the ignition is switched off. What is the most likely cause?
It's normal operation
It's on terminal 30, so there has to be a short to terminal 31 on the ground side
It's on terminal 30, so there has to be a short between terminal 75x and power
It's on terminal 50, so this is normal
Except Touareg, what happens when the electro-mechanical parking brake switch is operated above 7km/h?
The electro-mechanical parking brake gradually applies to operate as an emergency brake
Nothing. The electro-mechanical parking brake switch is deactivated above 7km/h
The electro-mechanical parking brake applies abruptly to operate as an emergency brake
ESC will intervene and operate as an emergency brake
What happens when an AUTO HOLD precondition is no longer met?
There are no preconditions
The electro-mechanical parking brake engages
The seatbelt warning lamp is illuminated
The Airbag Control Module (J234) is deactivated
When AUTO HOLD first activates, the vehicle is held in place by the hydraulic brake system.
True
False
What happens when AUTO HOLD is active for more than 3 minutes?
The system switches from the hydraulic brakes to the electro-mechanical brakes
The ABS module overheats from the continuous running of the hydraulic pump (V156)
The wheel speed sensor trigger wheels are engaged with parking pawls
It deactivates at the 3 minute mark, be prepared!
How does Indirect Tire Pressure Monitoring detect low tire pressure if all tires are equally low?
It can't because the it uses only wheel rotation comparisons
There is a back-up Direct TPMS sensor that is activated after approximately 40 revolutions are not seen by the Indirect system
Using the 3rd law of PFM
Software in the ABS Control Module detects changes in harmonic resonance captured by the wheel speed sensors
Select all that apply. Which are true statements about Dynamic Chassis Control (DCC)?
It uses only a complex mechanical system to make adjustments
Dampening profiles cannot change until the vehicle is completely stopped
It also adjusts braking and steering profiles
It uses an electronic worm-gear type piston
What is the term for vibration that causes the steering wheel to move in the direction of the arrows in the image?
Shimmy
Shudder
Shake
Drone
Which signal is what an inductive wheel speed sensor would produce?
