At the end of this class, the students will hone their skills in the diagnosis and repair of Smog Check failures.
This class is intended to provide students a high level of competency in the diagnosis and repair of Smog Check failures. This training focuses on the areas of engine and emission control performance. This class is only for the purpose of re-certification and not for new Smog technicians trying to get a repair license.
Bar Specified Diagnostic training will need to be completed for new applicant’s meet the qualifications of the repair license
By completion student should have strong knowledge of:
Engine and Emission Control Performance
1. Describe engine theory, design, and operation.
2. Describe the theory, design and operation of induction and exhaust systems.
3. Describe the theory, design and operation of fuel systems. 4. Describe the theory, design and operation of ignition systems.
5. Describe theory, purpose, design and operation of emission control systems,
including, but not limited to, crankcase controls, fuel evaporative controls, air injection,
exhaust gas recirculation, catalyst and other exhaust gas after treatment systems, and
integrated emission control management strategies, such as spark control and variable
valve timing.
6. Describe the exhaust byproducts of internal combustion and define the primary
emissions resulting from this combustion process. (Oxygen, carbon dioxide, carbon
monoxide, hydrocarbon, oxides of nitrogen, sulphur dioxide, particulate matter).
7. Explain the relationship of the air/fuel ratio to the combustion process and the
resulting emissions (stoichiometric, rich, and lean).
8. Analyze exhaust gas readings to determine the best diagnostic strategy (4 - 5 gas
analysis).
9. Employ engine and emission control diagnostic test equipment, including, but not
limited to, cylinder compression gauge, cylinder leak down tester, fuel pressure gauge,
ignition oscilloscope, timing light, pressure/vacuum gauge, DMM, OBD diagnostic scan
tool, DSO, and exhaust gas analyzer.
10. Diagnose engine mechanical malfunctions or defects and determine appropriate
repairs.
11. Diagnose induction and fuel system malfunctions or defects and determine
appropriate repairs.
12. Diagnose emission control systems malfunctions/defects and determine appropriate
repairs. Including, but not limited to, crankcase controls, fuel evaporative controls,
exhaust gas recirculation, secondary air, and catalytic converter efficiency. 13. Diagnose ignition system malfunctions or defects and determine appropriate repairs.
14. Identify root or underlying causes of engine and emission control malfunctions and
differentiate between mechanical, electrical/electronic and fuel system problems and
determine appropriate repairs.
15. Describe the theory, design and operation of computerized engine and emission
control management systems, OBDI and OBDII.
16. Identify computerized engine and emissions control systems, subsystems and
components.
17. Describe OBDII monitors: catalyst efficiency, misfire detection, fuel system, heated
exhaust gas oxygen sensors, EGR, and comprehensive component monitors,
evaporative emissions, secondary air injection, thermostat, and PCV monitor.
18. Describe the OBDII system modes of operation, modes 1-9.
19. Evaluate a vehicle’s OBD data, to determine the systems operational status and
condition, including, but not limited to, supported monitors, monitor enabling criteria,
monitor readiness, generic and vehicle manufacturer fault codes, freeze frame data,
and fuel control.
20. Demonstrate comprehensive knowledge and ability in using an OBDII diagnostic
scan tool to detect various engine and emission control malfunctions.
21. Demonstrate comprehensive knowledge and ability in using a DSO to detect various
system / component malfunctions.
22. Evaluate a vehicle’s OBD data to verify proper engine / emission controls
management functionality- repair verification.