Using the Scan Tool
CODE RETRIEVAL PROCEDURE
7
Retrieving and using Diagnostic Trouble Codes (DTCs) for
troubleshooting vehicle operation is only one part of an
overall diagnostic strategy.
CODE RETRIEVAL PROCEDURE
Never
replace a part based only on
the DTC definition. Each DTC has a set of testing
procedures, instructions and flow charts that must be
followed to confirm the location of the problem. Always
refer to the vehicle's service manual for detailed testing
instructions.
Check your vehicle thoroughly before performing
any test.
ALWAYS
observe safety precautions whenever working on a
vehicle.
1.
Turn the ignition off.
2.
Locate the vehicle's 16-pin Data Link
Connector (DLC).
Some DLCs have a plastic cover
that must be removed before
connecting the Scan Tool.
If the Scan Tool is ON, turn it OFF
BEFORE connecting to the DLC.
3.
Connect the Scan Tool to the vehicle’s
DLC. The cable connector is keyed and
will only fit one way.
If you have problems connecting the cable to the DLC, rotate the
connector 180°.
If you still have problems, check the DLC on the vehicle and on
the Scan Tool.
4.
Turn the ignition on.
DO NOT
start the engine.
5.
When the Scan Tool is properly connected to the vehicle’s DLC, the
unit automatically turns ON.
If the unit does not power on automatically, it may indicate there
is no power present at the vehicle’s DLC connector. Check the
fuse panel and replace any burned-out fuses.
If replacing the fuse(s) does not correct the problem, consult the
vehicle’s repair manual to identify the proper computer (PCM)
fuse/circuit, and perform any necessary repairs before proceeding.
6.
The Scan Tool automatically starts a check of the vehicle’s
computer to determine which communication protocol it is using.
When the Scan Tool identifies the computer’s communication
protocol, a communication link is established.