Toyota/Lexus OBD1 Systems
ON-BOARD VEHICLE DIAGNOSTICS - VEHICLES COVERED
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ON-BOARD VEHICLE DIAGNOSTICS (OBD1)
Beginning in 1988, California's Air Resources Board (CARB), and
later, the Federal Government's Environmental Protection Agency
(EPA), required vehicle manufacturers to include a self diagnostic
program capable of identifying an emissions-related fault via the
vehicles On-Board Computers (some manufacturers used OBD
before it was required). The first generation of Onboard Diagnostics
came to be known as OBD I.
OBD I is a set of self-testing or self-diagnosing instructions that are
programmed into the vehicle's on-board computer.
The program is specifically designed to detect failures in the sensors,
actuators, switches and wiring of the various vehicle emissions-
related systems (fuel injection system, ignition system, EGR system,
catalytic converter, etc.). If the computer detects a failure in any one
of these components or systems, it alerts the driver by illuminating
the "Check Engine" light on the dash.
The computer also assigns a numeric code (OBD I systems utilized
a 2 or 3 digit code) for each specific problem that it detects, and
stores these codes in it's memory for later retrieval. The codes can
be retrieved from the computer's memory with the use of a device
called a "Diagnostic Tool" or a "Scan Tool".
With the exception of some 1994 and 1995 vehicles, most
vehicles from about 1982 to 1995 are equipped with OBD I
systems.
VEHICLES COVERED
The following tables identify the Toyota and Lexus OBD1 vehicles that
are covered by the Enhanced OBD2 & 1 Tool.
DLC 1 Cars
Year Model
Eng.
Size
Eng.
Code
DOHC/
SOHC Other
DLC
Type
1995 Camry
Coupe 2.2L 5S-FE DOHC
1
1992 Camry
Sedan 2.2L 5S-FE DOHC
1
1992 Camry
Sedan 3.0L 2VZ-FE DOHC
1
1993 Camry
Sedan 3.0L 3VZ-FE DOHC
1
1993 Camry
Sedan 2.2L 5S-FE DOHC
1
1994 Camry
Sedan 2.2L 5S-FE DOHC
1
1993 Celica
2.0L 3S-GTE DOHC Turbo 1
1993 Celica
2.2L 5S-FE DOHC
1
1994 Celica
1.8L 7A-FE DOHC
1
1994 Celica
2.2L 5S-FE DOHC
1
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