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Toyota/Lexus OBD1 Systems
DATA LINK CONNECTOR (DLC) - MIL
3120d 101
CHECK ENGINE
SERVICE SERVICE
ENGINE ENGINE
SOON
DATA LINK CONNECTOR (DLC)
Toyota vehicles are equipped with special Test Connectors that make it
possible to connect specialized testing equipment that communicates
with the vehicle's onboard computer. This Diagnostic Tool is designed
for use with two types of Toyota DLC connectors; DLC Number 1 and
DLC Number 2, as described below.
The Diagnostic Tool's Toyota Connector Cable Adaptor is
designed to match the vehicle's DLC. Make sure the adaptor
mates properly before applying any force when making the
connection. Applying force to the connector when not mated
properly may cause damage to the connectors.
1. Type 1 connector is also known as Data Link Connector Number 1.
The type 1 DLC connector is a rectangular connector and is usually
black or gray in color. The connector is located under the hood
(engine compartment) in the following general locations:
„ Front corner (right or left)
„ Fender well (right or left)
„ Fire wall (right or left)
It has a cover labeled "DIAGNOSTIC",
"DIAGNOSIS", or "CHECK CONN", Use the
square head of the Toyota Connector Cable
Adaptor on vehicles with this type of
connector.
2. Type 2 connector is also known as Data
Link Connector (DLC) Number 2. The
type 2 DLC connector is a round
connector and is usually black or gray in
color.
„ The connector is located "under the
dash" on the left hand side.
It may have a protective cap that needs to be removed before
connecting the Diagnostic Tool's DLC. Use the round head of the
Toyota Connector Cable Adaptor on vehicles with this type of
connector.
INSTRUMENT PANEL MALFUNCTION INDICATOR LIGHTS
(MIL)
Your vehicle's instrument panel has a Malfunction Indicator Light (MIL)
also called the "Check Engine" or "Service Engine soon" light. The MIL
is an indicator to warn the vehicle operator of a problem in the computer
control system.