Mitsubishi Lancer (4A9 engine). Manual — part 80
TROUBLESHOOTING
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-173
The system is normal.
Item No. Check item
Check condition
Normal condition
01
FL wheel speed sensor
Perform a test run of the vehicle.
The speedometer display and
the M.U.T.-III display almost
agree with each other. (During
stop: approximately 0.7km/h)
02
FR wheel speed sensor
03
RL wheel speed sensor
04
RR wheel speed sensor
05
Power supply voltage
System voltage (10 to 18 V
ASC operatable range)
07
Brake switch (input)
The brake pedal is depressed.
ON
The brake pedal is released.
OFF
08
Lateral G sensor (+: left
turn, -: right turn)
Vehicle stopped (level)
-0.11 to 0.11 G
Running
-1 to 1 G
09
G sensor (+:
deceleration, -:
acceleration)
Vehicle stopped (level)
0 G
*1
(fixed value)
Vehicle stopped (level)
Idle neutral
control
-0.11 to 0.11 G
Running
0 G
*1
(fixed value)
10
Master cylinder pressure
(+: pressure increase, -:
pressure decrease)
The brake pedal is depressed.
Increases by the amount of
the brake pedal depression.
The brake pedal is released.
-3 to 3 bar
11
Steering angle (+: left
turn, -: right turn)
Vehicle stopped (the steering wheel is
in the neutral position)
-6 to 6 deg
Running
Nearly the same as the
steering wheel operation
angle <-720 to 720 deg (ASC-
ECU normal detection value)>
Nearly the same as the
steering wheel operation
angle <-850 to 850 deg
(Sensor normal value as a
single unit)>
12
Yaw rate sensor (+: left
turn, -: right turn)
Vehicle stopped (level)
-3.6 to 3.6 deg/s
Running
-100 to 100 deg/s
14
Brake switch
The brake pedal is depressed.
ON
The brake pedal is released.
OFF
15
Emission test mode
Emission test mode: ON
ON
Emission test mode: OFF
OFF
26
Brake fluid pressure
switch
Brake fluid level is lower than the
"LOWER" marking.
Low
Brake fluid level is higher than the
"LOWER" marking.
Normal
TROUBLESHOOTING
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-174
28
ASC/TCL off switch
When the ASC OFF switch is not
operated (when the ASC control is
available)
ON
When the ASC OFF switch is operated
(pressed and held for 3 seconds or
more)(when the ASC control is
prohibited)
OFF
When the ASC OFF switch is operated
(pressed and held for 15 seconds or
more)(when the ASC OFF control is
prohibited by fail-safe function)
*2
ON
45
SAS OK flag
When the steering wheel sensor
neutral point is learned
Comp
When the steering wheel sensor
neutral point is not learned
Not Comp
When the steering wheel sensor is
defective
SAS fail
SAS fail&No Comp
65
Engine Speed
When the accelerator pedal is
depressed (engine started)
The tachometer display and
the M.U.T.-III display almost
agree with each other.
66
Engine torque
Displays the engine torque.
67
APS
Displays the accelerator pedal
opening angle.
68
Allow ESP torque request
Permitted
70
Target gear
When the selector lever is operated
Displays the selector lever
position.
71
Actual gear
72
Master cylinder pressure
Offset
The difference between the neutral
position that was input to the ASC-
ECU before the master cylinder
pressure sensor calibration and the
neutral position after the calibration.
-8 to 8 bar
73
Lateral G sensor offset
The difference between the neutral
position that was input to the ASC-
ECU before the G and yaw rate sensor
calibration and the neutral position
after the calibration.
-0.15 to 0.15 G
86
Ignition switch
Ignition switch: ON
ON
87
Ignition switch (input)
Ignition switch: ON
ON
88
Vehicle speed
Perform a test run of the vehicle.
The speedometer display and
the M.U.T.-III display almost
agree with each other.
91
Brake pressure sensor
The brake pedal is depressed.
ON
The brake pedal is released.
OFF
Item No. Check item
Check condition
Normal condition
TROUBLESHOOTING
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-175
NOTE:
.
•
*1
: The G and yaw rate sensor does not detect longitudinal acceleration of a vehicle, thus "0 G" is always
set.
•
*2
: When the ASC OFF switch is pressed and held for 15 seconds, the ASC system returns to the ON sta-
tus.
System shutdown by ECU
While ASC-ECU is disabled by the diagnostic func-
tion, the M.U.T.-III displayed data is different from the
actual measurement.
ACTUATOR TEST TABLE
M1355001600343
Using M.U.T.-III, the following actuators can be forci-
bly operated:
96
G sensor offset
The difference between the neutral
position that was input to ASC-ECU
before the G and yaw rate sensor
calibration and the neutral position
after the calibration.
0 G
*1
(fixed value)
The difference between
the neutral position that
was input to ASC-ECU
before the G and yaw
rate sensor calibration
and the neutral position
after the calibration.
Idle neutral
control
-0.15 to 0.15 G
97
Yaw rate sensor offset
The difference between the neutral
position that was input to the ASC-
ECU before the G and yaw rate sensor
calibration and the neutral position
after the calibration.
-6.0 to 6.0 deg/s
105
Power supply voltage (input)
System voltage (10 to 18 V
ASC operatable range)
120
Parking brake switch
(Input)
When the parking brake lever is pulled
up:
ON
When the parking brake lever is
released:
OFF
128
A.S.C./TCL off switch
(input)
The ASC OFF switch is pressed.
ON
The ASC OFF switch is not operated.
OFF
138
ESS request
ASC-ECU is demanding the ESS
operation of ETACS-ECU.
ON
ASC-ECU is not demanding the ESS
operation of ETACS-ECU.
OFF
Item No. Check item
Check condition
Normal condition
TROUBLESHOOTING
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-176
NOTE:
.
•
ABS and ASC are operated by ASC-ECU.
•
When ASC-ECU is disabled due to the fail-safe
function, the actuator test cannot be performed.
•
The actuator test can be performed only when
the vehicle is stationary.
•
While the actuator test is performed, the ABS
warning lamp flashes at a rate of 2 Hz.
•
While the actuator test is performed, the ASC
warning display and ASC OFF display illuminate.
•
After the actuator test has been performed, the
brake warning lamp, ABS warning lamp, ASC
operation display, and ASC OFF display illumi-
nate until the ignition switch is turned to ON again
or the communication between M.U.T.-III and
ASC-ECU is terminated.
Actuator test specifications
Item No.
Check item
Driven component
01
FL wheel ABS drive
Solenoid valve for the corresponding
channel of the hydraulic unit and pump
motor (simplified inspection mode)
02
FR wheel ABS drive
03
RL wheel ABS drive
04
RR wheel ABS drive
05
FL wheel TCL drive
06
FR wheel TCL drive
07
RL wheel TCL drive
08
RR wheel TCL drive
09
Engine TCL drive
Outputs the engine torque control signal
(engine torque = 0 N
⋅m) to the engine
ECU for three seconds.
10
ESS test mode
ASC-ECU requires an ESS operation of
ETACS-ECU.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст