Idiomas disponibles
Idiomas disponibles
ATTENTION
Read the operating instructions and all safety instructions contained therein carefully before using the
product. Use the product correctly, with care and only according to the intended purpose. Non-
compliance of the safety instructions may lead to damage, personal injury and to termination of the
warranty. Keep these instructions in a safe and dry location for future reference. Enclose the
operating instructions when handing over the product to third parties.
1. SAFETY PRECAUTIONS AND WARNINGS
To prevent personal injury or damage to vehicles and/or the scan tool, read this instruction manual
first and observe the following safety precautions at a minimum whenever working on a vehicle:
1. Always perform automotive testing in a safe environment.
2. Wear safety eye protection that meets ANSI standards.
3. Keep clothing, hair, hands, tools, test equipment, etc. away from all moving or hot engine parts.
4. Operate the vehicle in a well ventilated work area: Exhaust gases are poisonous.
5. Put blocks in front of the drive wheels and never leave the vehicle unattended while running
tests.
6. Use extreme caution when working around the ignition coil, distributor cap, ignition wires and
spark plugs. These components create hazardous voltages when the engine is running.
7. Put the transmission in PARK (for automatic transmission) or NEUTRAL (for manual
transmission) and make sure the parking brake is engaged.
8. Keep a fire extinguisher suitable for gasoline/chemical/electrical fires nearby.
9. Don't connect or disconnect any test equipment while the ignition is on or the engine is running.
10. Keep the scan tool dry, clean, free from oil/water or grease. Use a mild detergent on a clean
cloth to clean the outside of the scan tool, when necessary.
2. GENERAL INFORMATION
2.1 About DTC
Diagnostic Trouble Codes (DTC) are codes stored by the on-board computer diagnostic system in
response to a problem found in the vehicle. These codes identify a particular problem area and
intended to provide you with a guide as to where a fault might be occurring within a vehicle.
This section explains the basic elements of fault codes for J1587/J1708 and J1939 data bus
protocols, how to view these codes on TOOL, and what they mean.
Each fault code on TOOL contains three distinct pieces of information, as described below.
J1587/J1708 fault codes consist of the following, in this order:
Subsystem identifier (SID) – Indicates what function on the ECU has failed.
Failure Mode Indicator (FMI) - Indicates in what way the function failed.
Occurence (OC) – Indicates the occurrence times of the fault codes.
J939 fault codes consist of the following, in this order:
Suspect Parameter Number (SPN) – Indicates what function on the ECU has failed.
Failure Mode Indicator (FMI) - Indicates in what way the function failed.
Occurence (OC) – Indicates the occurrence times of the fault codes.
2.2 Diagnostic protocol standards J1708 / J1587 / J1939
SAE J1708, SAE J1587 and SAE J1939 are automotive diagnostic protocol standard developed by
the society of Automotive Engineers (SAE).
•
SAE J1708
SAE J1708 is a standard used for serial coummunications between ECUs on a heavy duty vehicle
and also between a cumputer and the vehicle. With respect to Open System Interconnection model
(OSI), J1708 defines the physical layer. Common higher layer that operate on top of J1708 are SAE
J1587 and SAE J1922.
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