Toyota COMPUTER-CONTROLLED SYSTEM User Manual

OUTLINE OF TCCS - What is TCCS ?
OUTLINE OF TCC S
WHAT IS TCCS ?
"TCCS" (Toyota Computer-Controlled System) is
the general name for a system which exercises
comprehensive and highly precise control of the
engine, drive train, brake system, and other
systems by means of an ECU* (electronic control
unit), at the heart of which is a microcomputer
.
Previously, TCCS was used as an engine control
system for only EFI (electronic fuel injection),
ESA (electronic spark advance), ISC (idle speed
control), diagnosis, etc
.
Later, control systems utilizing other separate
ECUs were developed and adopted for the
control of systems other than the engine also .
Currently, the term "TCCS" has come to mean a
comprehensive control system which incorpo-
®
rates control systems controlled by various ECUs
to ensure basic vehicle performance, not only
running, turning and stopping .
*At Toyota, a computer which controls each
type of system is called an "ECU"
.
REFERENCE
On some vehicle models, the ECT has its own
ECU, called the "ECT ECU" . (The ECU for
engine control is called the "Engine ECU" in
this case .) On models in which the ECT does
not have its own separate ECU, the ECT uses
the ECU for engine control, which is then
called the "Engine and ECT ECU" .
TCC S
CONCEPTUAL DIAGRAM OF TCC S
This manual explains the TCCS type engine
control system . For details concerning other
systems (ECT, ABS, TEMS, etc .), please refer to
the training manual for each individual system .
OHP
1
In addition, this manual assumes that you have
mastered the contents of the manual for Step 2,
vol . 5 (EFI) . If you have not, please read that
manual carefully before beginning this one .
5

Toyota COMPUTER-CONTROLLED SYSTEM Specifications

General

Brand	Toyota
Model	COMPUTER-CONTROLLED SYSTEM
Category	Automobile Accessories
Language	English