Mitsubishi Lancer Evolution 7. Manual — part 316
ABS <4WD> -
General Information/Service Specifications
35B-3
CONSTRUCTION DIAGRAM
Stop lamp
switch*
Parking brake
switch
Diagnosis
connector*
Wheel speed sensor
Wheel speed sensor
Hydraulic unit
assembly*
(integrated with
the ABS-ECU)
ABS warning lamp
Lateral G sensor
Longitudinal G sensor
Steering
wheel
sensor*
NOTE
For R.H. drive vehicles, only the position indicated by the * is symmetrical.
SERVICE SPECIFICATIONS
Items
Standard value
Wheel speed sensor internal resistance kΩ
1.24 - 1.64
Wheel speed sensor insulation resistance kΩ
100 or more
Lateral G sensor/Longitudinal G
sensor output voltage V
On stationary vehicle
2.4 - 2.6
sensor output voltage V
With front mark downward
3.4 - 3.6
ABS <4WD> -
Special Tools/Troubleshooting
35B-4
SPECIAL TOOLS
Tool
Number
Name
Use
MB991502
MUT-II sub
assembly
For checking of ABS
(Diagnosis code display when using the
MUT-II)
MB991529
Diagnosis code
check harness
For checking of ABS
(Diagnosis code display when using the ABS
warning lamp)
MB991348
Test harness set
For checking of G sensor
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points.
NOTES WITH REGARD TO DIAGNOSIS
1. The phenomena listed in the following table are not abnormal.
Phenomenon
Explanation of phenomenon
System check sound
When starting the engine, a thudding sound can sometimes be heard coming from inside
the engine compartment, but this is because the system operation check is being
performed, and is not an abnormality.
ABS operation sound
1. Sound of the motor inside the ABS hydraulic unit operation. (whine)
2. Sound is the generated along with vibration of the brake pedal. (scraping)
3. When ABS operates, sound is generated from the vehicle chassis due to repeated
brake application and release.
(Thump: suspension; squeak: tyres)
System check sound
When depressing the brake pedal during driving, a shock is sometime felt.
2. For road surfaces such as snow-covered roads and gravel roads, the braking distance for vehicles
with ABS can sometimes be longer than that for other vehicles. Accordingly, advise the customer
to drive safely on such roads by lowering the vehicle speed and not being too overconfident.
3. Diagnosis detection condition can vary depending on the diagnosis code.
Make sure that checking requirements listed in the “Comment” are satisfied when checking the trouble
symptom again.
ABS <4WD> -
Troubleshooting
35B-5
ABS WARNING LAMP INSPECTION
Check that the ABS warning lamp illuminates as follows.
1. When the ignition key is turned to “ON”, the ABS warning
lamp illuminates for approximately 3 seconds and then
switches off.
2. When the ignition key is turned to “START”, the ABS
warning lamp remains illuminated.
3. When the ignition key is turned from “START” back to
“ON”, the ABS warning lamp illuminates for approximately
3 seconds and then switches off.
NOTE
The ABS warning lamp may remain on until the vehicle
reaches a speed of several km/h. This is limited to cases
where diagnosis code Nos.21 to 24, 41 to 44, 53 or 55
have been recorded because of a previous problem
occurring. In this case, the ABS-ECU keeps the warning
lamp illuminated until the problem corresponding to that
diagnosis code can be detected.
4. If the illumination is other than the above, check the
diagnosis codes.
DIAGNOSIS FUNCTION
READING DIAGNOSIS CODES
Read a diagnosis code by the MUT-II or ABS warning lamp.
(Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points.)
NOTE
Connect the MUT-II to the diagnosis connector (16-pin).
ERASING DIAGNOSIS CODES
When using the MUT-II
Connect the MUT-II to the diagnosis connector (16-pin) and
erase the diagnosis code.
Caution
Turn the ignition key to the “LOCK” (OFF) position before
connecting or disconnecting the MUT-II.
Not
illuminated
ABS
warn-
ing
lamp
Illuminated
Approx. 3 s Approx. 3 s
Ignition
switch
START
ON
ACC,
ABS warning lamp
ABS <4WD> -
Troubleshooting
35B-6
When not using the MUT-II
NOTE
If the ABS-ECU function has been stopped because of fail-safe
operation, it will not be possible to erase the diagnosis codes.
1. Stop the engine.
2. Use the special tool to earth terminal (1) (diagnosis control
terminal) of the diagnosis connector.
3. Turn on the stop lamp switch. (Depress the brake pedal.)
4. After carrying out steps 1. to 3., turn the ignition switch
to “ON”. Within 3 seconds after turning the ignition switch
to “ON”, turn off the stop lamp switch (release the brake
pedal). Then, turn the stop lamp switch on and off a
total of 10 times.
1st
2nd 3rd 4th 5th 6th 7th 8th 9th 10th
Within
1
second
Within
1
second
Within
1
second
Within
1
second
Within
1
second
Within
1
second
Within
1
second
Within
1
second
Within
1
second
Within
1
second
1 second
Ignition switch
ON
LOCK (OFF)
Stop lamp switch
ON
OFF
ABS warning lamp
ON
OFF
ABS-ECU memory
Within 3
seconds
Erasing of ABS-ECU
diagnosis codes complete.
MB991529
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст