Obd2 systems, Code retrieval procedure – Equus 3120 - OBD 2&1 Tool Kit User Manual

Page 25

OBD2 & 1

OBD2 Systems

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 loca-
tion of the problem. This information is found in the vehicle's
service manual. Always refer to the vehicle's service manual
for detailed testing instructions.

Check your vehicle thoroughly before performing
any test. See Before You Begin on page 17 for
details.

ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more infor-
mation.

1. Turn the ignition OFF.

2. Locate the vehicle's 16-pin Data Link

Connector (DLC). See page 20 for con-
nector location.

Some DLCs have a plastic cover
that must be removed before con-
necting the Tool cable connector.

If the Tool is ON, turn it OFF by
pressing the POWER/LINK
button BEFORE connecting the
Tool to the DLC.

3. Connect the OBD II Cable to the Tool,

then connect to the vehicle’s DLC.

■

If you have problems connecting the cable connector to the DLC,
rotate the connector 180° and try again.

■

If you still have problems, check the pins on the Tool’s DLC and
on the vehicle’s DLC.

4. When the Tool’s cable connector is prop-

erly connected to the vehicle’s DLC, the
unit automatically turns ON, and the
LCD display shows instructions for link-
ing to the vehicle’s on-board
computer.

Retrieving and using Diagnostic Trouble Codes (DTCs) for

troubleshooting vehicle operation is only one part of an

overall diagnostic strategy.