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WorksheetsBrakes, Handling Controls and Safety Systems
Total questions: 15
Worksheet time: 8mins
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 becomes fully disabled
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 worn brake pads that require replacement.
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
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 apply hydraulic braking force until the vehicle speed decreases to 7km/h.
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 an Indirect Tire Pressure Monitoring system detect a low tire?
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 wheel speed via the wheel speed sensors.
Which statement is true regarding Dynamic Chassis Control (DCC)?
It uses only a complex magnetic system to make adjustments
Dampening profiles cannot change until the vehicle is stationary
A valve located on each strut / shock regulates fluid / gas flow between an inner and outer chamber.
It uses an electronic worm-gear type piston
An inductive wheel speed sensor will produce which of the following waveforms?
Technician A states that a binding caliper piston can cause the vehicle to pull during braking.
Technician B states that when the brakes are applied, the vehicle will pull towards the wheel with the binding / seized caliper.
Who is correct?
Technician A
Technician B
Both Technicians
Neither Technician
Brake pedal "drift" can be caused by:
A leaking caliper seal
A leaking master cylinder seal
A leaking outlet valve inside of the hydraulic block assembly
All of the above
Technician A states that active wheel speed sensors do not require a power supply from the ABS module in order to function.
Technician B states that active wheel speed sensors are capable of detecting reverse direction.
Who is correct?
Technician A
Technician B
Both Technicians
Neither Technician
Which two components were added to the pre-existing ABS system in order to create ESC?
Active wheel speed sensors and steering angle sensor
Vacuum booster sensor and electro-mechanical parking brake
Combination sensor and variable reluctance wheel speed sensor
Combination sensor and steering angle sensor
TPMS is designed to notify the driver of a tire "blow out" condition.
True
False
Technician A states that excessive lateral rotor runout is a common cause of brake pedal pulsations.
Technician B states that the maximum allowable lateral rotor runout for Volkswagen vehicles is .1mm.
Who is correct?
Technician A
Technician B
Both Technicians
Neither Technician
