L3 - 7270/7290 - 158 Diagnose - Rectify Chassis Faults

When using an oscilloscope, an inductive type wheel speed sensor will produce a

• sine wave

• square wave

• mirrored pattern

• constant voltage

Why is Electronic Brake force Distribution (EBD) used on modern light vehicles?

• To allow equal pressure to each braking unit.

• To extend the lifespan of braking components.

• To ensure braking force is diagonally split across the vehicle.

• To optimise braking force at the rear wheel’s dependant on load.

What must you ensure when replacing a front coil spring?

• Replace the strut damper insert.

• Replace the top mounting bearing.

• Make sure the spring is located correctly.

• Match the height of the old spring to the new.

Excessive negative camber on a vehicle’s front wheel would be indicated by excessive wear on the

• sidewall

• inner edge

• outer edge

• both inner and outer edges.

What should the Technician do after replacing the steering rack on an electronically controlled steering system?

• Bleed the system.

• Adjust the wheel bearings.

• Complete an alignment check.

• Erase the memory from the ECU.

A modern vehicle’s electronic stability program (ESP) would incorporate which one of the following components?

• Knock sensor.

• Height sensor.

• Optical sensor.

• Yaw-rate sensor.

Which one of the following would be the most accurate method to diagnose a brake judder complaint?

• Use an oscilloscope.

• Use a brake roller tester.

• Carry out a visual inspection.

• Take the vehicle on a road test.

What would cause “feathering” on a tyre tread?

• Incorrect caster angle.

• Incorrect wheel alignment.

• Tyre driven low on pressure.

• Tyre driven with excess pressure.

During a four-wheel alignment check the Technician notes the nearside front caster angle is out of specification. How would the fault be diagnosed?

• By a leaking steering rack.

• By a worn front wheel bearing.

• By a damaged bottom suspension arm.

• By a worn rear damper mounting bushes.

What would a Technician look for when diagnosing brake fade?

• A binding brake.

• A split servo pipe.

• A leaking master cylinder.

• A snapped handbrake cable.