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VERUS PRO Training Module 8
Applies To: VERUS® PRO
Global OBD-II: Global OBD-II, Readiness Monitors, Troubleshooter, The Ten Modes of OBD-II
Welcome to Snap-on® Training Solutions®. This module is designed to help you get the most out of your VERUS PRO diagnostic tool, and covers the use of Global OBD-II scanner functions.
Global OBD-II - Standard emissions-related coverage on all 1996-newer vehicles
Global OBD scanner coverage is strictly related to emissions-related coverage and is universal in that all vehicles sold in the US and Canada since 1996 must comply with this standard. All ten modes of OBD-II are covered by this tool and are accessed by selecting the OBD Direct icon on the home screen. All service modes are not supported by all vehicles, so the available menu selections will vary. Let’s start by exploring the OBD Direct functions.
Note: some vehicles do not support all ten modes, so results will vary.
This opens a menu of two choices: OBD Diagnose and OBD Health Check.
OBD Health Check allows you to perform a quick check of OBD-II codes and readiness monitors. For this demonstration we will select OBD Diagnose to diagnose a vehicle.
We see the following options: Start Communication initiates a test session. Select Communication Protocol establishes which vehicle protocol to use.
Let’s select Connector Information to see where to find the data link connector or DLC on the vehicle.
Let’s choose an Alfa Romeo.
Some of these models may not be familiar in the US, but all vehicles are included in Global OBD-II. So you know you always have emissions coverage on any vehicle. Let’s select model 147.
Here’s the connector location. Have you ever searched for a connector that was not in the “usual place?” The DLC locator makes it easy.
Coverage includes all ten modes of OBD-II and readiness monitors, which are very important when verifying emission repairs. Readiness monitors provide a status report on emissions-related systems. Some monitor reports require an extensive drive cycle in order to complete the requirements of the test.
The Screen presents 2 choices: Monitors Complete Since DTC Cleared and Monitors Complete This Cycle. Let’s look at Monitors Complete This Drive Cycle.
Results are shown for each monitor, if the monitor is supported by the vehicle, and whether the drive cycle test is complete for each monitor. All monitor tests must be complete in order for the vehicle to be ready for an emission test.
What’s this? Troubleshooter for Global OBD-II? You bet. Snap-on Troubleshooter consists of expert tips from OEM and specialty technicians. OBD-II tips pertain specifically to engine and emission systems. Select Fast-Track Troubleshooter.
Then select Tests and procedures.
Select Drive Cycle Procedures.
Troubleshooter shows drive cycle procedures for a fast way to complete readiness monitor tests.
Troubleshooter code tips can save significant diagnostic time by giving you the likely causes for a specific fault code. Select Code Tips.
Select P0xxx DTC Tip Lists
This tip on a vehicle speed sensor code shows likely causes that might not be obvious, like instrument panel or wiring issues.
The Ten Modes of OBD-II
Let’s take a brief look at the valuable information available in each of the ten modes in OBD-II.
Mode 1 displays live data parameters for engine and emissions systems. This is typically your first step when diagnosing a check engine light.
Mode 2 displays freeze frame data.
This is a record of vehicle data parameters captured at the moment a fault code was set. This can give valuable insight into the operating conditions of the vehicle at the time of the fault.
Mode 3 displays the OBD-II trouble codes currently set by the vehicle.
OBD-II fault codes are standard for every vehicle manufacturer. The code definition is also shown on the right to explain the meaning of the code. Remember to look at Troubleshooter for useful insight into the likely causes of each code.
Mode 4 provides an easy method to turn off the malfunction indicator lamp or MIL after a repair.
Caution - This also clears freeze frame data, pending codes, and readiness monitors. So this should usually be the last step in your repair process.
Modes 5, 6 and 7 display data parameters related to oxygen sensors, saved results of manufacturer-specific tests, and trouble codes detected during the last drive cycle. This is useful in determining the root cause of recurring fault codes.
Here’s your Mode 5 test results
Your mode 6 results
And your mode 7 results
Mode 8 allows a service technician to invoke an on-board test to seal the evaporative system for a pressure test.
This function varies by manufacturer. For example, on Ford systems, this closes the canister vent solenoid for ten minutes.
Mode 9 can read the calibration and ID numbers for the engine control unit or ECU.
Or the vehicle identification number or VIN.
Mode 9 Performance Tracking displays a record of the number of times each of the readiness monitor have been completed.
Remember for easy navigation you can use the back icon at any time to step back one screen, and the home icon as a shortcut to the main menu.
Last Updated: October 25, 2019