DHM 121 - Introduction to Diagnostic Testing

Lecture Hours: 1 Lab Hours: 3 CWE Hours: 0 Credits: 2

Description: This course is an introduction to basic theory and practical application of diagnostic testing equipment in trouble-shooting procedures. Content includes the study of diagnostic software and generic diagnostic readers for all major engine manufacturers.

Prerequisite(s): Take DHM 159 or CWE 113 and DHM 173.

Course Topics:

Scan tool operation
Diagnostic processes

Textbooks:
Textbook information can be found on the Chaser’s Bark Shop website

Grading System:
An overall grade of C or higher is required for transferability.

A = 90 - 100
B = 80 - 89
C = 70 - 79
D = 60 - 69
F = 0 - 59

Student Learning Outcomes:

Identify the symptoms, to system, to component, to cause diagnostic process.
Analyze the application of guided diagnostics and pinpoint test procedures.
Examine the technical information included in Technical Service Bulletins and Recalls.
Interpret readings from basic diagnostic testing equipment.
Examine diagnostic trouble codes using a scan tool.

For SCC Online Courses:
If the course you are taking is online, please review the SCC Online Course Policies that include:

Identity Verification
Required materials for all online courses
Mandatory Attendance Requirement
Orientation and Support
Proctored Exams

Standard SCC Course Policies:
Please review the Standard Course Policies on the following topics:

Academic Integrity
Add/Drop period
Attendance
Classroom Conduct
Equal Access
IT Access
Online Behavior
Online Confidentiality
Services For Students with Disabilities
Student Concerns
Student Help Services
Withdrawals

Official Course Syllabus
2026-2027