Mitsubishi ECLIPSE Technical Information Manual

3-38
DRIVE-CONTROL COMPONENTS - ABS <FWD>
INITIAL CHECK FUNCTION
The ECU always performs an initial check on the
ABS system with the on-board diagnostic function.
1. Initial Check Operation
(1) When the ignition key is placed in the ON posi-
tion, the power is supplied to the ABS-ECU,
and the ABS-ECU starts a diagnostic sequence.
During the diagnostic period, the ABS valve
relay stays in the “OFF” state and the warning
light continues to light.
If it detects an error, it illuminates the warning light,
and disables the ABS system.
(2) Then, the ABS-ECU forces the ABS valve relay
into the “ON” state and executes diagnostic test
mode of the ABS valve relay to detect an ON
or OFF failure.
(3) All the solenoid valves are caused to be ON
and OFF to make sure that the valves are not
sticking.
(4) With the ignition key placed in the “START”
position and engine started, the voltage at the
generator terminal L rises. At the moment, the
ABS-ECU power supply is cut off, but since
,(‘)I
(2) , (3)
-4
the ABS valve relay is caused to be “OFF”,
the warning light is kept in the ON state by
the ground contact circuit of the ABS valve relay.
(5) If the engine starts and the ignition key is re-
turned to the “ON” position, the ABS-ECU power
supply is resumed, and initial checks in (1)
through (3) are performed again.
(6) When the initial checks are satisfactorily com-
pleted, the ABS becomes ready for operation.
The warning light goes out upon detection of
a high voltage at the generator terminal L.
NOTE
An operation check for the motor relay and the motor
is performed when the vehicle is put in motion after
starting the engine. This check is performed only
one whenever the ignition switch is turned “ON”.
Ignition key
START
ON
.:.
ACC
.,
ABS-ECU
power supply
12v
,.
. .
ov
Generator High
terminal L
Ei Or more)
(Less than 6 V)
:
: :i
.:
ABS warning
light
ON --..---
‘.
OFF ‘. ,‘.j ‘.’
ABS valve
relay
ON
I
.
OFF
I ‘,. ::
. . . . . . ,. .,
: ‘..
,‘...’ .,::
.: ,.,., .: :
Solenoid
valve
ON
OFF
14X0242

Mitsubishi ECLIPSE Specifications

General

Brand	Mitsubishi
Model	ECLIPSE
Category	Automobile
Language	English