User Manual

Using the Scan Tool
CODE RETRIEVAL PROCEDURE
32 3040e
 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.
6. The Scan Tool will automatically start a
check of the vehicle’s computer to deter-
mine which type of communication proto-
col it is using. When the Scan Tool identi-
fies the computer’s communication proto-
col, 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.
 If the Scan Tool fails to link to the
vehicle’s computer, a “Communication
Error” message shows on the Scan
Tool’s display.
- Ensure your vehicle is OBD2
compliant. See VEHICLES
COVERED on page 4 for vehicle
compliance verification information.
- Verify the connection at the DLC, and verify the ignition is ON.
- Turn the ignition OFF, wait 5 seconds, then back ON to reset
the computer.
- Press the LINK
button to continue.
 If the Scan Tool cannot link to the
vehicle’s computer after three
attempts, the message “Contact
Technical Support” displays.
- Press the SYSTEM MENU
button to return to the System
Menu.
- Turn the ignition off, and discon-
nect the Scan Tool.
- Contact Technical Support for as-
sistance.
7. If the Scan Tool can decode the Vehicle
Identification Number (VIN) for the
vehicle under test, the Vehicle
Information screen displays.