Mitsubishi Eclipse. Technical Information Manual (1994) — part 66
DRIVE-CONTROL COMPONENTS ABS
3. Diagnostic Trouble Code Clearing Procedure
NOTE
(1) When the ABS-ECU system is out of order,
the diagnostic trouble codes in the memory can-
not be cleared by use of the scan tool.
(2) To check whether the memory has been cleared,
the diagnostic trouble code reading procedure
should be performed.
<When the scan tool is used>
Clear the memory according to the message that
appears on the scan tool. (For details, refer to the
scan tool is not used>
To erase the trouble codes in memory, place the
stop light switch in the ON state and then set the
ignition switch to ON (generator terminal L voltage:
LOW) and change over the stop light switch
(3) Even after the memory has been cleared, an
instruction from the scan tool can be accepted.
a diagnostic trouble code, the scan
tool should be re-operated.
instruction manual for the scan tool.)
times within the following time intervals. The trouble
codes in memory will then be erased in about a
second.
Ignition
switch
OFF
I
Generator HI
I
terminal
I
L voltage
LOW
Stop light
I
switch
I
or
I
1st
4th
9th
I
I
I
J
Warning
ON
light
OFF
1 sec.
ABS-ECU
memory
1 sec.
Erasure
If any of the following conditions is true, the trouble
codes in memory will not erase.
l
When the stop light switch is not ON before
the ignition switch is set to ON
l
When the first stop light switch input change
(ON-OFF) does not occur in less than three
seconds, or when the second and subsequent
change does not occur in less than one second
l
When the generator terminal L voltage goes
“HI” before erasure is completed
A B S
Data List Output
Of the ABS-ECU
input data, the following items can be read by the scan tool.
1. When the System is in Order
Code No.
Items
Displayed unit
11
Front right wheel speed
km/H
12
Front left wheel speed
km/H
13
Rear right wheel speed
km/H
14
Rear left wheel speed
km/H
21
ABS-ECU power voltage
22
Generator power voltage
23
Stop light switch ON/OFF state
ON/OFF
2. When the System is in the ABS-ECU Isolated State
When the ABS-ECU is placed in the out of service
not displayed. The data displayed by the scan tool
state by the on-board diagnostic program, the wheel
is always “0.0 km/h (0 mph)“.
speeds of No. 11 through 14 described above are
Actuator Test
The actuator can be force-driven using the scan
actuator testing exceeds 10 km/h (6 mph),
tool for easy operation inspection.
forced actuation will be cancelled.
NOTE
(3) The following item numbers are those to be
(1) If the ABS-ECU function has been cancelled,
entered on the scan tool to give an actuator
an actuator test cannot be performed.
test instruction.
(2) Actuator testing is only possible when the ve-
hicle is stationary. If the vehicle speed during
Item No.
01
02
03
Drive object
Drive pattern
F.R. solenoid valve
and pump motor
Increase in
Solenoid
valve
F.L. solenoid valve
and pump motor
Rear solenoid valve
and pump motor
Pump
motor
Start of forced actuation
End of forced actuation
SYSTEM OPERATION
Refer to 1991 3000GT Technical Information Manual (Pub. No. PXSE9001).
DRIVE-CONTROL COMPONENTS ABS
ANTI-LOCK BRAKE SYSTEM (ABS) <AWD>
N73ZNaQM
The ABS used in the 1995 Eclipse is similar to
the previous one.
The AWD version ABS is a 4-sensor, 2-channel
Combining the ABS with the AWD system has signifi-
type and is the same as the FWD system except
cantly improved the “stopping” as well as “running”
for the following respects.
performance of the AWD vehicles. It assures a high
l
Wheel speed sensor rotor (rear) press-fitted
in drive shaft
level of running performance under any conditions,
not only on a dry pavement but also on a slippery
road surface.
Gap adjustment-free wheel speed sensor and
rotor
l
Semiconductor type G sensor
4 7
6
Part name
Wheel speed sensor
No.
Function
1
Sends an AC signal with a frequency proportional to the ro-
tating speed of the individual wheel to the ABS-ECU.
Sensor
G-sensor
2
Sends an ON/OFF signal to the ABS-ECU depending on
vehicle acceleration/deceleration.
Stop light switch
3
Sends a signal to the ABS-ECU indicating whether the
brake pedal is pressed or not.
Actuator
Hydraulic unit (HU)
ABS power relay
Motor relay
Valve relay
Controls braking pressure for each wheel depending on the
4
signal from the ABS-ECU.
Includes built-in select-low valve
5
Supplies power to the ABS-ECU.
6
Closes contact in response to a signal from the ABS-ECU to
allow the power to be supplied to the motor in the HU.
7
Is turned ON by the ABS-ECU signal and supplies power to
the solenoid valve in HU.
ABS warning light
8
Is in the combination meter and lights up when there is
trouble in ABS.
Data link connector
Electronic control unit (ECU)
9
Outputs diagnostic trouble codes.
10
Controls the actuators such as HU according to the signals
from the individual sensors.
DRIVE-CONTROL COMPONENTS
- A B S
<AWD>
3-45
SYSTEM DRAWING
Wheel speed sensor (FL)
FL solenoid valve
1
Wheel speed sensor
Wheel speed sensor (RR)
FR solenoid valve
ABS valve relay
ABS motor relay
ABS valve relay response signal-
m o t o r r e s p o n s e s i g n a l
G sensor
Stop light switch
ECU power
Stop light switch
I
Rear right wheel (RR)
sensor
unit (HU)
I
Wheel speed sensor
valve
Front right wheel (FR)
G sensor
ABS
Rear left wheel (RL)
Front left wheel (FL)
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