**Perform a battery, starter, charging system test using the VAT-40 (updated) by Eli Jaramillo



Overview: Using correct go/no-go specifications and a VAT- tester, students will load test vehicle battery, starter and charging systems to determine if those components meet specifications or need service or replacing.

Details: This is a two-hour lesson in which students will learn how to use a SUN VAT- load tester on vehicle battery, starter, and charging systems. The goal: Instruct students on the importance of proper diagnostics for fixed-right first-time and best customer satisfaction.

Understanding the proper use of a load tester such as the VAT- is an important achievement for any automotive student. This lesson combines all three tests the VAT- is capable of performing into one lesson. Additionally, ASE test-preparation tasks will be emphasized during this lesson.

Lesson times

Opener/hook activity
15 Minutes
Classroom: Instructor lecture/show and tell
30 Minutes
Lab session for group #1:
30 Minutes
Lab session for group #2:
30 Minutes
15 Minutes

Industries / Subjects / Grades

Industries / Pathways
  • Transportation

Standards and Objectives


California's 2008 CTE Standards (8)
California Academic Content Standards (2)

Related Instructional Objectives (SWBAT...)

  • Students will use appropriate personal protective equipment and safety practices when operating in the classroom and the lab.
  • Students will use appropriate tools and equipment as needed to perform systems and component diagnostic, maintenance and repair operations.
  • Students will select and use the appropriate measurement device(s) and use mathematical functions necessary to perform required calculations during classroom and lab activities.
  • Students will access technical service manuals, electronic retrieval systems, and related technical data resources as needed for classroom and lab activities.
  • Students will comprehend the importance of calibration processes, systems, and techniques when using the equipment on the vehicle systems they test.
  • Students will test and diagnose vehicle batteries.
  • Students will test and diagnose starting and charging systems.

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