Mitsubishi Lancer Evolution VI. Manual - part 63

ABS  – 

General / Service Specifications / Special Tools

35B-2

GENERAL

OUTLINE OF CHANGE

D

The description of the service procedures including the troubleshooting using an MUT-

II

 tester has

been incorporated.

SERVICE SPECIFICATIONS

Items

Standard value

Resistance between hydraulic unit
solenoid valve terminals

Ω

IN

8.04 – 9.04

solenoid valve terminals 

Ω

OUT

4.04 – 4.54

Wheel speed sensor-to-rotor clearance   mm

0.3 – 0.9

Wheel speed sensor’s internal resistance   k

Ω

1.4 – 1.8

Wheel speed sensor insulation resistance   k

Ω

100

Acceleration sensor output voltage   V

On stationary vehicle

2.4 – 2.6

With front mark downward

3.4 – 3.6

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 acceleration sensor

ABS  – 

Troubleshooting

35B-3

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Refer to GROUP 00 – How to Use Troubleshooting/Inspection  Service  Points.

NOTES WITH REGARD TO DIAGNOSIS

D

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)

D

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.

D

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 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.

4.

If the illumination is other than the above, check the
diagnosis codes.

ABS
warning
lamp

Not
illuminated

ABS warning lamp

Illuminated

Approx. 3 s

Approx. 3 s

Ignition
switch

START

ON

ACC,

LOCK

ABS  – 

Troubleshooting

35B-4

DIAGNOSIS FUNCTION

DIAGNOSIS CODES CHECK

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 16-pin diagnosis connector.

ERASING DIAGNOSIS CODES

Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.

ABS  – 

Troubleshooting

35B-5

INSPECTION CHART FOR DIAGNOSIS CODES

<EVOLUTION-IV>

Diagnosis
code No.

Diagnosis items

Reference Page

11

Wheel speed sensor (FR) system (open- or short-circuit)

35B-7

12

Wheel speed sensor (FL) system (open- or short-circuit)

35B-7

13

Wheel speed sensor (RR) system (open- or short-circuit)

35B-7

14

Wheel speed sensor (RL) system (open- or short-circuit)

35B-7

15

Wheel speed sensor system (abnormal output signal)

35B-9

16

ABS-ECU power supply system (abnormal voltage drop or rise)

35B-10

21

Wheel speed sensor (FR) system

35B-7

22

Wheel speed sensor (FL) system

35B-7

23

Wheel speed sensor (RR) system

35B-7

24

Wheel speed sensor (RL) system

35B-7

27

AYC monitor system (defective AYC)

35B-12

32

Acceleration sensor circuit system

35B-12

33

Stop lamp switch system (open circuit or stop lamp stays ON)

35B-14

41

Solenoid valve (FR) system

35B-15

42

Solenoid valve (FL) system

35B-15

43

Solenoid valve (RR) system

35B-15

44

Solenoid valve (RL) system

35B-15

51

Valve relay system

35B-16

53

Motor relay system

35B-18

63

ABS-ECU failure

Replace ABS-ECU.