June 19, 2021

Guide to Using Car Code Readers

By Donny Romero

A auto code reader is among the easiest automobile diagnostic tools you will find. They’re intended to interface with an automobile’s computer and report difficulty codes which could activate search engine lights as well as other issues.

How Does a Car Code Reader Work?

OBD-I and OBD-II code reader systems operate in essentially the exact same manner, they also track an assortment of sensor inputs and outputs. If the system decides that whatever is out of spec, it places a “trouble code” which may be utilised in diagnostic procedures. Every code corresponds to a certain fault. Additionally, there are various kinds of codes (i.e. hard, soft) that signify both ongoing and irregular issues.

When a trouble code is set, a specific landroverbar indicator on the dashboard will light up. This is the error indicator lamp (MIL), which can be known as a check engine light. It basically means you can hook up a car code reader to learn what the issue is. Obviously, some codes don’t activate the check engine light.

Each OBD system has some kind of connector which could be used to regain codes. Back in OBD-I systems, it’s occasionally feasible to use this connector to test codes with no a car code reader. For example, it is likely to bridge GM’s ALDL connector then examine the blinking check engine light to ascertain which codes are set. In a similar manner, codes could be read out of OBD-I Chrysler vehicles by simply turning the ignition key off and on at a particular pattern.

Put simply OBD-I systems and most of OBD-II systems, difficulty codes are read by simply plugging a car code reader to the OBD connector. This permits the code reader to port with the automobile’s computer, pull on the codes, and at times execute a couple other primary functions.

How to Use a Car Code Reader

To be able to use a car code reader, then it has to be plugged in an OBD system. Every OBD-I program has its own connector, which may be found in many of different areas. These connectors are usually located under the hood at the neighborhood of the fuse box, but they could also be located under the dashboard.

In vehicles which were constructed after 1996, the OBD-II connector is generally found under the dash near the steering column. In milder cases, it might be found behind a panel in the dashboard, or perhaps supporting the ashtray or a different compartment.

What Can a Car Code Reader Do?

Following the OBD socket was found and attached, the automobile code reader will interface with all the automobile’s computer. Straightforward code readers can draw energy via an OBD-II link, so preventing the reader may electricity this up as well.

At the point, you will generally have the ability to:

Read and apparent codes.
View fundamental parameter IDs.
Check and reset readiness tracks.
The particular options change from 1 auto code reader into another, but at the bare minimum, you need to have the ability to read and apparent codes. Obviously, it is a fantastic idea to prevent clearing the codes till you’ve written them down, at which point you can look them up onto a problem code chart.