CTE Task: Maintain Electronic Memory Function

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Maintenance and Light Repair II (MLR II)


30 Minutes


Maintain Electronic Memory Function

Task Description


Students will:

  • Watch the linked videos using guided notes.
  • Complete the worksheet.
  • Record a video of themselves describing the steps and tools involved in maintaining electronic memory function when disconnecting the battery.


Safety Note: If possible, students should do this task with a vehicle, but ensure the students do so safely.

Maintain or restore electronic memory function. (4.3)

Overall Standard (4): Students will inspect, test, and service vehicle batteries.

 Content Understandings

Extending Understandings

Upon successful completion of these tasks students will demonstrate the ability to:

  • Describe process to maintain the memory while working on the vehicle.
  • Select the tools required.
  • Locate the OBD II location.
  • Explain why the OBD II is sometimes called a ‘battery saver’.   

To move students towards deeper understanding, they should be given opportunities to:

  • Explain why vehicles older than 1996 may need a different method to maintain memory.
  • Explain why pre-set settings and computer memory are important to save.

Support Strategies

If students are struggling to access this task, additional supports and strategies could be employed as students are engaging with the task.

Key Terms                                                                                                                             

Sentence Frames

Scaffolded Questions

OBD II port


 The ______________ is the plug-in location for the On-board Diagnostic Two system.    

What other functions does the OBD II port have for the vehicle?



Instructional Resources


Videos to watch (see note guide below)


Christopher Lum (2019, October 14) Using a Memory Saver When Disconnecting Your Car Battery (Video) YouTube https://www.youtube.com/watch?v=wb3Dq4NM3QY (7 minutes)

Mercedessoure (2014, July 14) How to Replace a Battery in a Complex Computer Controlled Benz: Part 2 (Video) YouTube https://www.youtube.com/watch?v=JfeXk__BGJM (10 minutes)


Additional Resources


Ryan (2018, December 4) How to change a car battery without losing memory in MODERN CARS!! (Video) YouTube https://www.youtube.com/watch?v=O2wTgnIwuVM (8:45 minutes)


richpin06a (2013, July 25) OBD2 Memory Saver (Video) YouTube https://www.youtube.com/watch?v=CWQXGPp7i0E (6:30 minutes)

Student Resource

Click here to download the student resource for this task. 

Student Video Guide

How to Maintain Memory using the OBD II port

  • Check vehicle specifications to find details related to maintaining memory (such as pre-set settings and computer memory) while working on the vehicle.
  • Determine the power source to be used to maintain power.
  • Find the OBD II port under the dashboard of the vehicle.
  • Plug in the OBD II plug with the power source connected to it.
  • Disconnect the battery.
  • Perform the work on the vehicle.
  • Reconnect the battery.
  • Disconnect the OBD II plug and power source.
  • Verify that all settings and memory were maintained during the work.



Student Worksheet

Questions for after watching all resources


What are possible reasons the power needs to be maintained and the memory of the vehicle needs to be retained?



What tools and parts are needed?



What precautions need to be observed when working on the OBDII system?



What are the steps involved in maintaining memory functions while working on the battery?