
Ford OBD1 Systems
FORD COMPUTER SYSTEM OVERVIEW - VEHICLES COVERED
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FORD COMPUTER SYSTEM OVERVIEW
The OBD 1 & 2 Diagnostic Tool is compatible only with EEC-
IV Computer Control systems.
IMPORTANT: When the computer is in Self-Test mode (is
testing the sensors or actuators for proper operation), it relies
on voltage signals that is sends to and / or receives from the
sensors or actuators to determine whether or not these
components are operating properly. The sensors and
actuators are all connected to the computer by wires. If any
defects are present in any part of the circuit that connects
these devices to the computer (such as defective connectors
or wires, faulty grounds, improper voltage, shorts etc.), the
voltage signal that the computer receives from these devices
will be affected. The computer has no way of determining if
the improper voltage signal is being caused by a defect in the
circuit or by the sensors or actuators themselves. Keep this in
mind when servicing fault codes, and do not replace any
devices (sensors or actuators) before checking the complete
circuit (or circuits) that are part of the device from which the
code was generated.
VEHICLES COVERED
CAR - Ford, Lincoln, Mercury Computer System/Tool Application
Table
The following table lists the year and model of all the cars that are
covered by the Diagnostic Tool.
Engine
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model) Application/Special
Notes
Computer
System
1981-1982
1.6L I-4
5, 2
EFI, EFI Turbo Escort,
EXP,
LN7,
Lynx
2.3L I-4
5
EFI Turbo
Capri, Cougar, Mustang, T-
Bird
2.3L I-4 HSC
R, J
FBC (6149)*
Capri, Fairmont, LTD, Marquis,
Mustang, Tempo, Topaz,
Zephyr
EEC-IV
1984-1986
1.6L I-4
4, 5, 8
EFI EFI Turbo
Escort, EXP, Lynx
2.3L I-4
2.3L I-4 OHC
A, J, R
FBC
(YFA)* (6149)*
Capri, Cougar, LTD, Marquis,
Mustang, Tempo, Topaz
2.3L I-4
T, W
EFI Turbo
Capri, Cougar, Merkur XR4Ti,
Mustang, T-Bird
2.3L I-4 HSC
S, X
CFI
Tempo, Topaz
3.8L V-6
3
CFI
Capri, Cougar, LTD, Marquis,
Mustang, T-Bird
EEC-IV
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