Mitsubishi Lancer Evolution 7. Manual — part 26
DRIVE-CONTROL COMPONENTS -
4ABS
3-23
ABS ELECTRICAL CIRCUIT DIAGRAM
5
15A
12
7.5A
15
15A
Ignition Switch
(IG2)
Fusible link
No. 1
Fusible link
No. 3
Battery
Dedicated
fuse
Combination meter
(ABS warning lamp)
Stop lamp
switch
Stop lamp
Motor
Hydraulic unit
Solenoid valves
ABS-ECU
FL
FR
RL
RR
Wheel speed sensor
Diagnosis
connector
Motor power
supply
ECU power
supply
ABS
Stop lamp
switch monitor
Solenoid valve
power supply
Communication
line
Control line
7.5A
Ignition Switch
(IG1)
Junction block (Multi-purpose fuse)
2
ABS
signal output
4WD-ECU
Steering wheel
sensor
7.5A
5
Lateral G sensor
Longitudinal
G sensor
Steering wheel
sensor input
Lateral
G sensor
input
Longitudinal
G sensor
input
Wheel speed
sensor output
Parking brake
switch monitor
Parking brake
switch
DRIVE-CONTROL COMPONENTS -
4ABS
3-24
SENSORS
WHEEL SPEED SENSOR
The wheel speed sensors consist of fixed ABS
speed sensors and the ABS rotors that rotate at
the same speed as the wheels, and output
alternating current signals at frequencies which are
proportional to the wheel speed.
D
The ABS rotors (43 teeth) are installed to the
drive shafts, and the ABS speed sensors are
installed to knuckles.
D
The gap between the ABS rotors and the ABS
speed sensors are non-adjustable at both the
front and rear to improve serviceability.
ABS rotor
ABS speed
sensor
Front
Rear
Drive shaft
ABS rotor
ABS speed
sensor
Drive shaft
LATERAL G SENSOR/LONGITUDINAL G SENSOR
Refer to GROUP 2 - ACD and AYC.
STEERING WHEEL SENSOR
Refer to GROUP 2 - ACD and AYC.
Parking brake lever
Lateral G sensor
Longitudinal G sensor
Steering wheel sensor
DRIVE-CONTROL COMPONENTS -
4ABS
3-25
STOP LAMP SWITCH
This switch turns on when the brake pedal is
depressed, and turns off when the brake pedal
is released. The ABS-ECU detects whether the
stop lamp switch is on or off by means of fluctuations
in voltage (ON: system voltage; OFF: Approximately
0 V). This data is used for ABS control.
PARKING BRAKE SWITCH
This switch turns on when the parking brake lever
is pulled, and turns off when the parking brake
lever is released. The ABS-ECU detects whether
the parking brake switch is on or off by means
of fluctuations in voltage (ON: less than 1V; OFF:
system voltage). This data is used for ABS control.
ACTUATORS
ABS WARNING LAMP
The ABS-ECU controls the power transistor in ABS-ECU to
turn on and causes the ABS warning lamp to illuminate in
the following cases:
D
During initial check when the ignition switch is at the
“ON” position (for approximately 3 seconds)
D
When a problem happens in the ABS/EBD system
D
Poor ABS-ECU connector connection
HYDRAULIC UNIT
The hydraulic unit is basically the same as that of the 1999
PAJERO io <General Export>/2000 PAJERO PININ
<Europe>.
ABS warning lamp
DRIVE-CONTROL COMPONENTS -
4ABS
DRIVE-CONTROL COMPONENTS -
4ABS
3-26
ABS-ECU
The ABS-ECU is basically the same as that of the
1999 PAJERO io <General Export>/2000 PAJERO
PININ <Europe> except for the followings:
FAIL-SAFE FUNCTION
Diagnosis code No
Item
Diagnosis code No.
Item
11
Open circuit or short-circuit in wheel speed sensor (FR)
12
Open circuit or short-circuit in wheel speed sensor (FL)
13
Open circuit or short-circuit in wheel speed sensor (RR)
14
Open circuit or short-circuit in wheel speed sensor (RL)
16
Abnormal drop or rise in ABS-ECU power supply voltage
21
Wheel speed sensor (FR) system
22
Wheel speed sensor (FL) system
23
Wheel speed sensor (RR) system
24
Wheel speed sensor (RL) system
32
Longitudinal G sensor system
41
Solenoid valve (FR) system
42
Solenoid valve (FL) system
43
Solenoid valve (RR) system
44
Solenoid valve (RL) system
51
Valve relay ON problem
52
Valve relay OFF problem
53
Motor relay OFF problem
54
Motor relay ON problem
55
Motor system
63
ABS-ECU abnormality
71
Lateral G sensor system
81
Steering wheel sensor (ST-1) system
82
Steering wheel sensor (ST-2) system
83
Steering wheel sensor (ST-N) system
DATA LIST REFERENCE TABLE
Item No.
Check item
Display unit or words
11
Front-right wheel speed sensor
km/h
12
Front-left wheel speed sensor
13
Rear-right wheel speed sensor
14
Rear-left wheel speed sensor
21
Power supply voltage
V
29
Parking brake switch
ON/OFF
36
Stop lamp switch
ON/OFF
37
Steering wheel sensor straight ahead position memory
ON/OFF
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