Toyota COMPUTER-CONTROLLED SYSTEM

11
OUTLINE OF
TCCS - History of TCCS Engine Control Syste m
HISTORY OF TCCS ENGINE CONTROL SYSTE
M
The ECU used for conventional EFI in export
models beginning in 1979 was the analog circuit
type, which controlled the injection volume
based on the time required for a capacitor to be
charged and discharged .
The microcomputer-controlled type was added
beginning in 1981
. That was the beginning of the
engine control system using
TCCS . Now ,
however, the TCCS engine
control system not
only controls EFI, but also ESA, which controls
ignition timing ; ISC, which controls the idle
speed, and other such advanced systems ; as
well as the diagnostic, fail-safe, and back-up
functions .
CYL .
ARR .
ENGINE MODELS
1980 1985 1990 199 5
K series
(
4K-E)
-- ~
E series
( 3E-E) [2E-E, 4E-FE, 5E-FE ]
A series ( 4A-GE, 4AG-ZE )
[4A-FE, 5A-FE, 7A-FE ]
L4
S series ( 2S-E )
(1 S-i,
1S-E, 2S-E) 1 3S-FE, 5S-FE ,
3S-GE, 3S-GTE
]
R series ( 22R-E )
(22R-TE) [22R-E] ~
Y series ( 3Y-E )
[4Y-E ]
RZ series [1RZ-E, 2RZ-E, 2RZ-FE, 3RZ-FE 1
TZ series [2TZ-FE, 2TZ-FZE] ~
G series ( 1G-E)[1G-FE ]
(1G-GE)
----- ~
~
L6
M series (4M-E, 5M-E, 5M-GE
)
(5M-GE, 6M-GE, 7M-GE, 7M-GTE )
JZ series [2JZ-GE, 2JZ-GTE] ~
F series ( 3F-E) ~
FZ series [ 1 FZ-FE ]
V6
VZ series ( 2VZ-FE)[3VZ-E, 3VZ-FE, 5VZ-FE ]
MZ series [1 MZ-FE ]
V8 UZ series [1UZ-FE ]
INTAKE AIR SENSING DEVICE S
Vane type air flow meter -
Manifold pressure (vacuum) senso r
Optical Karman vortex type air flow mete r
Hot-wire type mass air flow meter -
1 : No longer in production models
I I
: Current product models
--- ~ : EFI (EFI control only
)
TCCS (EFI, ESA, ISC, Diagnosis,
etc )
6