Knowledge of Diagnosis and Rectification of Light Vehicle Engine Faults

Unit Reference Number:     F/601/3733

Learning OutcomesAssessment Criteria
1Understand how the light vehicle engine systems operate1.1Explain the construction and operation of light vehicle engine systems to include:

a. SI fuel systems
b. CI fuel systems
c. ignition systems
d. engine management
e. valve mechanisms
f. pressure charged induction systems
g. exhaust emission reduction systems
h. heating, ventilation and cooling

1.2Explain the interaction between electrical, electronic and mechanical components within light vehicle engine systems
1.3Explain how electrical systems interlink and interact, including multiplexing and fibre optics
1.4Compare light vehicle engine system components and assemblies against alternatives to identify differences in construction and operation
1.5Identify the engineering principles that are related to light vehicle engine systems

a. volumetric efficiency
b. flame travel, pre ignition and detonation
c. fuel properties
d. composition of carbon fuels
e. combustion process
f. legal requirements for exhaust emissions

2Understand how to diagnose and rectify faults in light vehicle engine systems2.1Describe how to analyse symptoms and causes of faults found in light vehicle engine systems to include:

a. engine mechanical components
b. ignition systems
c. fuel systems
d. engine management system
e. pressure charged induction systems
f. heating, ventilation and cooling

2.2Explain systematic diagnostic techniques used in identifying engine system faults
2.3Explain how to examine, measure and make suitable adjustments to the components including:

a. settings
b. input and output values
c. voltages
d. current consumptione. resistance
f. output patterns with oscilloscope
g. pressures
h. condition
i. wear and performance

2.4Explain how to carry out the diagnosis and rectification activities in order to correct the faults in the light vehicle engine systems
2.5Explain how to select, prepare and use diagnostic and rectification equipment for light vehicle engine systems
2.6Explain how to evaluate and interpret test results found in diagnosing light vehicle engine system faults against vehicle manufacturer specifications and settings
2.7Explain how to evaluate the operation of components and systems following diagnosis and repair to confirm system performance