Equus 3160 - ABS/SRS + OBD2 Scan Tool - Manual (Page 25)

Using the Scan Tool
CODE RETRIEVAL PROCEDURE
OBD2 23
„ If the unit does not power on automatically when connected to
the vehicle’s DLC connector, it usually indicates there is no
power present at the vehicle’s DLC connector. Check your fuse
panel and replace any burned-out fuses.
„ If replacing the fuse(s) does not correct the problem, consult
your vehicle’s repair manual to identify the proper computer
(PCM) fuse/circuit, and perform any necessary repairs before
proceeding.
5.
Turn the ignition on. DO NOT start the engine.
6.
Press and release the Scan Tool’s POWER/LINK
button.
„ The Scan Tool will automatically
start a check of the vehicle’s
computer to determine which type of
communication protocol it is using.
When the Scan Tool identifies the
computer’s communication protocol,
a communication link is established.
The protocol type used by the
vehicle’s computer is shown on the
display.
A PROTOCOL is a set of rules and procedures for
regulating data transmission between computers, and
between testing equipment and computers. As of this
writing, five different types of protocols (ISO 9141, Keyword
2000, J1850 PWM, J1850 VPW and CAN) are in use by
vehicle manufacturers. The Scan Tool automatically
identifies the protocol type and establishes a
communication link with the vehicle’s computer.
7.
After approximately 10~60 seconds, the Scan Tool will retrieve and
display any Diagnostic Trouble Codes, Monitor Status and Freeze
Frame Data retrieved from the vehicle’s computer memory.
„ If the Scan Tool fails to link to the
vehicle’s computer a “Linking
Failed” message shows on the Scan
Tool’s display.
- Verify the connection at the DLC,
and verify the ignition is ON.
- Turn the ignition OFF, wait 5
seconds, then turn back ON to
reset the computer.
- Ensure your vehicle is OBD2 compliant. See VEHICLES
COVERED on page 5 for vehicle compliance verification
information.