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Section 1
Interpret customer concerns and symptoms
Preview
Preview: General Engine Diagnosis (40%)
Preview includes- 4 of 5 lesson topics
- 1 overview segment
- 3 core concepts
- 2 exam tips
Lesson Topics
- Reproduce the Concern
- Capture Operating Conditions
- Separate Symptom from Assumption
- Choose a Discriminating Test
Overview
Engine diagnosis starts by reproducing the customer's concern when practical and documenting the conditions that make it occur.
Core Concepts
- Verify the concern before disassembly or parts replacement.
- Recreate the operating condition that makes the symptom appear whenever safe and practical.
- Change one condition at a time when comparing loaded versus unloaded, hot versus cold, or accessory-on versus accessory-off behavior.
Exam Tips
- Underline the condition that changes when the complaint appears.
- Prefer evidence that reproduces the complaint before evidence gathered under unrelated conditions.
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Section 2
Diagnose fuel and air delivery
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Section 3
Diagnose oil-pressure and lubrication faults
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Section 4
Perform visual and basic checks
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Section 5
Diagnose cylinder-head faults
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Section 6
Inspect block and rotating assembly
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Section 7
Use diagnostic test results
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Section 8
Diagnose ignition and electrical faults
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Section 9
Diagnose cooling-system faults
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Section 10
Distinguish mechanical from control faults
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Section 11
Inspect valve-train components
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Section 12
Evaluate exhaust restrictions
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Section 13
Inspect pumps and thermostats
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Section 14
Measure wear and clearances
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Section 15
Interpret related scan and test data
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Section 16
Service timing components
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Section 17
Verify system operation
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Section 18
Verify repairs
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Section 19
Diagnose bearing and sealing faults
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Section 20
Select repair procedures
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