Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing spark ignition engine management systems, including procedures for:
using specialised tools and equipment
using appropriate personal protective equipment (PPE)
identifying hazards and controlling risks associated with:
working on vehicle high voltage ignition systems
wearing jewellery while working around high current wiring systems
working with high pressure petrol fuel systems
operating principles of spark ignition engine management systems and associated components, including:
combustion, including:
air-fuel ratios and chemistry of combustion
composition of petrol fuel, including octane rating
indirect and direct fuel injection
application, purpose and operation of spark ignition engine management systems and components, including:
fuel system, including:
fuel filters
fuel pumps
fuel pressure regulators
fuel injectors
electronic control system, including the following system inputs:
throttle position sensors
coolant temperature sensors
oxygen sensors
load sensors and air flow meters
intake air temperature sensors
crankshaft position sensors
camshaft position sensors
battery voltage
accessory load sensors
knock sensors
key features of electronic control units (ECUs), including:
read-only memory (ROM)
programmable read-only memory (PROM)
electronically erasable programmable read-only memory (EEPROM)
random access memory (RAM)
multiplexing
adaptive learning
short-term fuel trim (STFT)
long-term fuel trim (LTFT)
sensor reference voltages and sensor grounds
system outputs, including:
injectors
idle speed control devices
fuel pump relays
engine cooling fans
air conditioning compressor controls
broadband intake manifolds
exhaust gas recirculation solenoid controls
carbon canister purge controls
throttle motor (drive by wire) controls
variable valve timing controls
assembly line diagnostic link (ALDL)
ignition systems and components, including:
spark plugs
ignition leads
ignition coils, including electromagnetic induction
ignition timing, including varying ignition timing according to engine load, speed and knock sensor input
dwell period
ECU control of ignition coil switching and methods of generating timing signals, including:
profile ignition pick-up (PIP) and crankshaft position sensor signals, including inductive pick-up, Hall effect and light emitting diode (LED)
waste spark ignition systems
coil-on-plug ignition systems
integrated ignition systems
diagnostic testing procedures for spark ignition engine management systems, including:
diagnostic flow charts
fuel system testing, including:
low pressure fuel system testing
high pressure fuel system testing
testing electrical systems, including procedures for:
accessing electrical terminals and using test probes without damaging connectors, fuse holders or wiring
injector testing
sensor testing
actuator testing
accessing and interpreting industry-relevant test equipment data, including:
fault codes
live data
freeze frame data
waveforms
repair or replacement procedures for spark ignition engine management systems, including procedures for:
removing and replacing the following electrical or electronic components:
sensors
actuators, including fuel injectors and fuel pumps
adjusting and recalibrating components and associated systems
post-repair testing procedures, including procedures for:
clearing fault codes
assessing engine performance
checking for electrical connector mating.
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment must include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the spark ignition engine management systems that they have worked on, e.g. repair orders.
Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources must be made available:
automotive repair workplace or simulated workplace
workplace instructions
manufacturer specifications for spark ignition engine management systems
three different vehicles or machinery with spark ignition engine management system faults
diagnostic equipment for spark ignition engine management systems, including:
multimeter
scan tool
tools, equipment and materials appropriate for repairing spark ignition engine management systems.