Certificate III Light Vehicle Mechanical TechnologyAUR30616
1.General Health And Safety2.Anti-Lock Braking Systems3.Electronic Stability Control4.Passive Safety Systems5.Active Safety Systems6.Circuit Components7.Advanced Electrical Diagnosis8.Repair Procedures
Diagnose and repair faults in dynamic control systems of vehicles. These systems include the functions of a vehicle electronic braking control module (EBCM), such as anti-lock braking, brake assist, descent control, electronic brake force distribution, electronic park brake, hill start assist, stability control, traction control and active roll-over protection. The unit involves preparing for the task, selecting the correct diagnostic procedure, carrying out the diagnosis and the repair, performing post-repair testing, and completing workplace processes and documentation.
Chapter 1 General Health and Safety
Chapter 1 General Health and SafetyAppropriate PPE is to be worn at all timesIdentify and control risks as requiredIf any fire starts, first isolate the source only if safe to do soEvacuate under the instructions of your warden
Electrical Health and SafetyIf an electrical fire starts, first you must isolate the power source, only if it is safe to do so.Not all fire extinguishers are appropriate to use on an electrical fire as the contents of some extinguishers are conductive and may cause electrocution if used.If the fire is larger than the capability of your extinguisher, sound the alarm, and evacuate under the instructions of your warden.
Chapter 2 Anti-Lock Braking Systems
Chapter 2 Anti-Lock Braking SystemsVehicle Dynamic Control (VDC) is a term used to describe a group of electronic systems that work together in maintaining enhanced control over a vehicle’s dynamic movement. •Braking •Cornering •Acceleration
Chapter 2 Anti-Lock Braking SystemsMaximum braking efficiency can usually be found at around 10-20% slip. Past this point though, braking efficiency drops markedly and increases the chance of complete lock up (100% slip).
Chapter 2 Anti-Lock Braking SystemsWhen the brakes are depressed, the control unit compares the signals from each individual wheel speed sensor. If tyre slip exceeds a certain limit, it modulates braking pressure to the necessary wheel(s) until slip returns to within an acceptable level
Chapter 2 Anti-Lock Braking SystemsABS Control ModuleThe ABS module will use an array of input devices to monitor and measure, then use output devices to control the system
Chapter 2 Anti-Lock Braking Systems›Brake SwitchAs the brake pedal is depressed, the switch will either make or break a connection, signalling the drivers intention to slow the vehicle - only then will the ABS module begin to monitor and trigger VDC protocols
Chapter 2 Anti-Lock Braking SystemsWheel Speed SensorThe most critical input for ABS is that from the wheel speed sensors
Chapter 2 Anti-Lock Braking SystemsAn inductive type sensor produces an AC voltage, the voltage increases as the speed increases. This is known as a