Heavy Duty Equipment Technician Red Seal Exam Prep · Question
What is the term for a self-diagnostic feature in an Electronic Control Unit (ECU) that detects and stores information about malfunctions in the system?
Diagnostic Trouble Codes (DTCs) are alphanumeric codes stored by the ECU when a sensor or system operating outside of its normal parameters is detected. These c
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Question: What is the term for a self-diagnostic feature in an Electronic Control Unit (ECU) that detects and stores information about malfunctions in the system?
Answer options:
- Real-time data stream
- Parameter identification ✅ Diagnostic Trouble Codes (DTCs)
- Component actuation test
Correct answer: Diagnostic Trouble Codes (DTCs)
Explanation: Diagnostic Trouble Codes (DTCs) are alphanumeric codes stored by the ECU when a sensor or system operating outside of its normal parameters is detected. These codes help technicians pinpoint electrical and mechanical issues.
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- What is the primary purpose of a 'lock-up clutch' in a modern heavy-duty torque converter?
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