Innova 3120d, Руководство пользователя, Страница: 36 / 131

Using the Diagnostic Tool
CODE RETRIEVAL PROCEDURE
34 3120d
„ 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 Diagnostic Tool will automatically
start a check of the vehicle’s computer
to determine which type of communica-
tion protocol it is using. When the
Diagnostic Tool identifies the com-
puter’s communication protocol, a com-
munication 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 Diagnostic Tool automatically
identifies the protocol type and establishes a communication link
with the vehicle’s computer.
7. After approximately 10~60 seconds, the Diagnostic Tool will retrieve
and display any Diagnostic Trouble Codes, Monitor Status and
Freeze Frame Data retrieved from the vehicle’s computer memory.
„ If the Diagnostic Tool fails to link to
the vehicle’s computer a “Linking
Failed” message shows on the
Diagnostic 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.
„
The Diagnostic Tool will display a
code only if codes are present in the
vehicle’s computer memory. If no
codes are present, the message “No
Powertrain DTCs or Freeze Frame
Data presently stored in the
vehicle’s computer” displays.
„ The Diagnostic Tool is capable of
retrieving and storing up to 32 codes
in memory, for immediate or later
viewing.