Mitsubishi Lancer Evolution VI. Manual - part 52

REAR AXLE – 

General / Service Specifications / Lubricant

27-2

GENERAL

OUTLINE OF CHANGE

D

The descriptions of the service procedures for the AYC system including the troubleshooting using
an MUT-

II

 tester has been incorporated.

SERVICE SPECIFICATIONS

<Vehicles with AYC>

Items

Standard value

Limit

Rear axle total backlash mm

–

5

Pressure generated by hydraulic unit MPa

0 – 1.6

–

Wheel bearing axial play mm

–

0.05

Wheel bearing rotation starting torque Nm

–

1.0  or less

LUBRICANT

<Vehicles with AYC>

Items

Specified lubricant

Capacity

Gear oil

Torque
transfer
differential

Differential

Hypoid gear oil API classification GL-5 or higher
SAE viscosity No. 90, 80W

0.41 

±

 0.02 

ȏ

differential

Torque transfer
mechanism

MITSUBISHI GENUINE DIA QUEEN AYC FLUID

0.70

)

0

*

0.05

ȏ

Hydraulic piping fluid

Dia Queen ATF SP

II 

or equivalent

1 

ȏ

Torque transfer mechanism oil seal lips

Vaseline

As required

REAR AXLE – 

Special Tools

27-3

SPECIAL TOOLS

Tool

Number

Name

Use

MB991502

MUT-

II

 sub-

assembly

Inspection of AYC 
(diagnosis display by MUT-

II

)

MB991529

Diagnosis code
check harness

Inspection of AYC 
(diagnosis display by AYC warning lamp)

MD998330
(MD998331)

Oil pressure
gauge 
(2,942 kPa)

Hydraulic pressure measurement 
<vehicles with AYC>

MB991705

Hose adapter

MB990925

Bearing & oil seal
installer set

Pressfitting of oil seal <differential>

MB991115

Oil seal installer

Pressfitting of oil seal <differential> 
(used in combination with MB990938)

MD998812

Installer cap

Pressfitting of oil seal <torque transfer mecha-
nism of vehicles with AYC>

MD998813

Installer 100

MD998829

Installer adapter
(60)

REAR AXLE – 

Special Tools / Troubleshooting <AYC>

27-4

MB990925

Brass bar

Bar (one-touch type)

Toolbox

Installer adapter

Tool number (MB990925)

O.D. mm

Tool number (MB990925)

O.D. mm

A

MB990926

39.0

A

MB990933

63.5

MB990927

45.0

MB990934

67.5

MB990928

49.5

MB990935

71.5

MB990929

51.0

MB990936

75.5

MB990930

54.0

MB990937

79.0

MB990931

57.0

B

MB990938

–

MB990932

61.0

C

MB990939

–

TROUBLESHOOTING <AYC>

BASIC TROUBLESHOOTING CONDITIONS

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

NOTE
Before starting the troubleshooting procedure, make sure that the following items have been checked
okay.

D

The correct steering wheel has been properly installed in the neutral position of the steering column
shaft.

D

Tire and wheel sizes are correct with correct specifications. Inflation pressure, balance, and wear
conditions are okay.

D

Wheel alignment is correct.

D

The engine, suspension, and other parts have not been remodeled so as to affect the AYC system.

DIAGNOSIS FUNCTION

READING THE DIAGNOSIS CODE

Read the diagnosis code using an MUT-

II

 tester or the AYC warning lamp.

(Refer to Group 00 – How to Use Troubleshooting / Inspection Service Points.)

ERASING THE DIAGNOSIS CODE

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

REAR AXLE – 

Troubleshooting <AYC>

27-5

3. INSPECTION CHART FOR DIAGNOSIS CODE

Diagnosis
code No.

Diagnosis items

Ref. page

12

Power supply voltage (valve power supply) system (open- or short-circuit)

27-6

21

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

27-6

22

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

27-6

23

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

27-6

24

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

27-6

25

Wrong-diameter tire

27-8

26

Faulty wheel speed sensor

27-9

31

Steer sensor (ST-1, ST-2, ST-N) system (open-circuit)

27-10

32

Steer sensor (ST-N) system (short-circuit)

27-10

33

Steer sensor (ST-N) system

27-11

34

Steer sensor (ST-1, ST-2) system (short-circuit)

27-11

41

TPS system (open- or short-circuit)

27-12

51

Longitudinal acceleration sensor system (open- or short-circuit)

27-12

52

Longitudinal acceleration sensor

27-13

56

Lateral acceleration sensor system (open- or short-circuit)

27-12

61

Stop lamp switch system (open-circuit)

27-13

65

ABS monitor system (open-circuit or defective ABS)

27-14

71

Proportioning valve system (open- or short-circuit)

27-14

72

Directional control valve (right) system (open- or short-circuit)

27-15

73

Directional control valve (left) system (open- or short-circuit)

27-16

81

AYC relay system (open- or short-circuit)

27-17

82

Electric pump system

27-18

83

Electric pump system

27-19