What is the primary function of OBD-II monitors?

To set the perimeters on the car's computer (PCM) for emissions and other system checks.

Where is the DLC connector typically located in most cars?

Underneath the driver's side dashboard.

What does it mean if a scan tool indicates that some OBD-II monitors are 'not ready'?

It means that the car has not completed its self-testing of those systems since the last time the battery was disconnected or the codes were cleared, and it may not pass an emissions test.

After disconnecting and reconnecting the car battery, approximately how long might it take for all OBD-II monitors to reset and be in a 'ready' state?

Anywhere from 20 to 150 miles of driving, depending on the car.

Using Scan Tools To Read Obd-ii Codes Lesson Plan for Grade 12th Grade

Lesson Preview

Learning Objective

I can use a scan tool to connect to the DLC, retrieve specific DTCs, and determine the readiness status of OBD-II monitors.

1
When the battery is disconnected, all monitors are cleared, which can affect emission inspections.
2
A scan tool can be used to check if the monitors are ready before going to a shop for a state inspection.
3
The DLC connector is typically located underneath the driver's side and is used to connect the scan tool to the car's computer.

Using Scan Tools to Read OBD-II Codes

Lesson Preview

Learning Objective

Warm-Up Video

Key Concepts

Practice Questions

Exit Ticket

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