Canobd2 code reader software

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Features unique patented all-in-one screen display and LED display for quick emissions check. Automatic refresh updates data every 30 seconds when connected to the vehicle - an easy way to verify repair completion. Memory feature stores codes, even when reader is unplugged. Product Videos. Custom Field. You May Also Like Quick view Details. Equus sku: EPI Add to Cart.

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This manual describes common test procedures used by experienced service technicians. Always read your vehicle's service manual and follow its safety precautions before and during any test or service procedure.

When an engine is running, it produces carbon monoxide, a toxic and poisonous gas. To prevent serious injury or death from carbon monoxide poisoning, operate the vehicle ONLY in a well-ventilated area. To protect your eyes from propelled objects as well as hot or caustic liquids, always wear approved safety eye protection. When an engine is running, many parts such as the coolant fan, pulleys, fan belt etc. To avoid serious injury, always be aware of moving parts.

Keep a safe distance from these parts as well as other potentially moving objects. Engine parts become very hot when the engine is running. To prevent severe burns, avoid contact with hot engine parts. Before starting an engine for testing or troubleshooting, make sure the parking brake is engaged.

Put the transmission in park for automatic transmission or neutral for manual transmission. Block the drive wheels with suitable blocks. Connecting or disconnecting test equipment when the ignition is ON can damage test equipment and the vehicle's electronic components.

To prevent damage to the on-board computer when taking vehicle electrical measurements, always use a digital multimeter with at least 10 MegOhms of impedance. Fuel and battery vapors are highly flammable. Don't wear loose clothing or jewelry when working on an engine. Loose clothing can become caught in the fan, pulleys, belts, etc. Jewelry is highly conductive, and can cause a severe burn if it makes contact between a power source and ground.

Federal law requires that all and newer cars and light trucks sold in the United States must be OBD2 compliant; this includes all Domestic, Asian and European vehicles. Some and vehicles are OBD2 compliant. To find out if a or vehicle is OBD2 compliant, check the following:. This label is located under the hood or by the radiator of most vehicles.

Some and vehicles have pin connectors but are not OBD2 compliant. Locate the battery cover on the back of the Diagnostic Tool. Slide the battery cover off use your fingers. Replace batteries with two AA-size batteries for longer life, use Alkaline-type batteries. Reinstall the battery cover on the back of the Diagnostic Tool.

The first time the unit is turned on, you must select the desired display language English, French or Spanish and unit of measurement USA or Metric as follows:. Use the DOWN button to highlight the desired unit of measurement.

After the initial language and unit of measurement selections are performed, these, as well as other settings, can be changed as desired. When retrieving and viewing DTCs, scrolls down through the current display screen to display any additional data. Monitor icons - Indicate which Monitors are supported by the vehicle under test, and whether or not the associated Monitor has run its diagnostic testing Monitor status.

When a Monitor icon is solid, it indicates that the associated Monitor has completed its diagnostic testing. When a Monitor icon is flashing, it indicates that the vehicle supports the associated Monitor, but the Monitor has not yet run its diagnostic testing.

When visible, the Diagnostic Tool is communicating with the computer. If the Link icon is not visible, the Diagnostic Tool is not communicating with the computer. Computer icon - When this icon is visible it indicates that the Diagnostic Tool is linked to a personal computer. Optional software is available that makes it possible to upload retrieved data to a personal computer. If the batteries are not replaced when the battery symbol is "on", all 3 LEDs will light up as a last resort indicator to warn you that the batteries need replacement.

No data will be displayed on screen when all 3 LEDs are lit. Each fault is assigned a code number that is specific to that fault. Electronic Computer Control Systems make it possible for vehicle manufacturers to comply with the tougher emissions and fuel efficiency standards mandated by State and Federal Governments. To further complicate matters, the energy crisis of the early s caused a sharp increase in fuel prices over a. As a result, vehicle manufacturers were not only required to comply with the new emissions standards, they also.

Federal Government. Precise fuel delivery and spark timing are needed to reduce vehicle emissions. Mechanical engine controls in use at the time such as ignition points, mechanical spark advance and the carburetor responded too slowly to driving conditions to properly control fuel delivery and spark timing. This made it difficult for vehicle manufacturers to meet the new standards.

A new Engine Control System had to be designed and integrated with the engine controls to meet the stricter standards. The new system had to:. Respond instantly to supply the proper mixture of air and fuel for any driving condition idle, cruising, low-speed driving, high-speed driving, etc.

Vehicle Computer Control Systems can perform millions of calculations each second. This makes them an ideal substitute for the slower mechanical engine controls. By switching from mechanical to electronic engine controls, vehicle manufacturers are able to control fuel delivery and spark timing more precisely. Some newer Computer Control Systems also provide control over other vehicle functions, such as transmission, brakes, charging, body, and suspension systems.

The Computer Control System consists of an on-board computer and several related control devices sensors, switches, and actuators. The on-board computer is the heart of the Computer Control System. Separate values are provided for various driving conditions, such as idle, low speed driving, high-speed driving, low load, or high load. However, some manufacturers may still position it in the engine compartment.

Vehicle sensors, switches, and actuators are located throughout the engine, and are connected by electrical wiring to the on-board computer. These devices include oxygen sensors, coolant temperature sensors, throttle position sensors, fuel injectors, etc. Sensors and switches are input devices. They provide signals representing current engine operating conditions to the computer. Actuators are output devices.

They perform actions in response to commands received from the computer. The on-board computer receives information inputs from sensors and switches located throughout the engine.

The computer compares the values received from these sensors with its preset reference values, and makes corrective actions as needed so that the sensor values always match the preset reference values for the current driving condition. The computer makes adjustments by commanding other devices such as the fuel injectors, idle air control, EGR valve or Ignition Module to perform these actions.

Vehicle operating conditions are constantly changing. With the exception of some and vehicles, most vehicles from to are equipped with some type of first generation On-Board Diagnostics. The programs are specifically designed to detect failures in the sensors, actuators, switches and wiring of the various vehicle emissions-related systems. If the computer detects a failure in any of these components or systems, it lights an indicator on the dashboard to alert the driver.

The computer also assigns a numeric code for each specific problem that it detects, and stores these codes in its memory for later retrieval. These programs closely monitor the functions of various emissions-related compo-. The information that was gathered from these studies showed the following:. A large number of vehicles had deteriorating or degraded emissions-related components. These components were causing an increase in emissions.

Because OBD1 systems only detect failed components, the degraded components were not setting codes. Some emissions problems related to degraded components only occur when the vehicle is being driven under a load.

The emission checks being conducted at the time were not performed under simulated driving conditions. As a result, a significant number of vehicles with degraded components were passing Emissions Tests.

Codes, code definitions, diagnostic connectors, communication protocols and emissions terminology were different for each manufacturer.

This caused confusion for the technicians working on different make and model vehicles. These laws required that vehicle manufacturers to equip their new vehicles with devices capable of meeting all of the new emissions standards and regulations.

It was also decided that an enhanced on-board diagnostic system, capable of addressing all of these problems, was needed. To expand emissions-related system monitoring. This includes a set of computer run diagnostics called Monitors. To standardize the code numbers, code definitions and language used to describe faults. Before OBD2, each vehicle manufacturer used their own code numbers, code definitions and language to describe the same faults.

To standardize communication procedures and protocols between the diagnostic equipment Scan Tools, Code Readers, etc. The following terms and their definitions are related to OBD2 systems. Read and reference this list as needed to aid in the understanding of OBD2 systems. Currently, up to fifteen Monitors are used in OBD2 systems. Additional Monitors will be added as the OBD2 system is further developed.

Others may require a set of complex procedures, such as, starting the vehicle when cold, bringing it to operating temperature, and driving the vehicle under specific conditions before the Monitor can run and complete its diagnostic testing. These conditions may include starting the vehicle when it is cold, driving the vehicle at a steady speed cruising , accelerating, etc.

Only those trips that provide the Enabling Criteria for all Monitors applicable to the vehicle to run and complete their individual diagnostic tests qualify as an OBD2 Drive Cycle. OBD2 Drive Cycle requirements vary from one model of vehicle to another.

Vehicle manufacturers set these procedures. The PCM uses warm-up cycles as a counter to automatically erase a specific code and related data from its memory. When no faults related to the original problem are detected within a specified number of warm-up cycles, the code is erased automatically.