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Mitsubishi Lancer Evolution 7. Manual - part 253

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-35

DATA LIST REFERENCE TABLE

Item

no.

Check item

Check condition

Normal conditions

Wheel speed sensor

<FR>

Execute actual driving.

The speed meter dis-

play and MUT-II dis-

t h

Wheel speed sensor

<FL>

p y

play match.

Wheel speed sensor

<RR>

Wheel speed sensor

<RL>

Wheel speed sensor

<FR> (0.2 km/h)

Wheel speed sensor

<FL> (0.2 km/h)

Wheel speed sensor

<RR> (0.2 km/h)

Wheel speed sensor

<RL> (0.2 km/h)

Vehicle speed

Battery voltage

Ignition switch: ON

System voltage

Proportional valve cur-

rent <ACD>

During ACD operation

50 - 1,000 mA

Proportional valve cur-

rent <AYC>

During AYC operation

50 - 1,000 mA

TPS voltage

Ignition switch: ON
Engine: Stopped

Accelerator

pedal:

Full

closed

535 - 735 mV

Engine: Stopped

Accelerator pedal: Press

Gradually rises from

the above value

Accelerator

pedal:

Full

throttle

4,500 - 5,000 mV

Longitudinal G sensor

voltage

Ignition switch: ON

Vehicle stopped (horizon-

tal) state

2.4 - 2.6 V

Actual driving

The displayed value

increases

and

de-

creases mainly around

2.5 V.

Lateral G sensor volt-

age

Ignition switch: ON

Vehicle stopped (horizon-

tal) state

2.4 - 2.6 V

Perform actual driving

The displayed value

increases

and

de-

creases mainly around

2.5 V.

Steering

operation

angle

Ignition switch: ON

Steering wheel: Steer by 90

degrees to the right

R90 deg

Steering wheel: Steer by 90

degrees to the left

L90 deg

Steering angle velocity

Ignition switch: ON

Steering wheel: No steering

0 deg/s

Steering wheel: Steer

The display changes

according to the revolu-

tion speed.

Pressure sensor

During electric pump motor operations

1.0 - 1.6 MPa

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-36

Item

no.

Normal conditions

Check condition

Check item

Pressure sensor power

supply

Ignition switch: ON

Approx.5 V

Valve power supply

Ignition switch: ON

System voltage

Steering wheel sensor

voltage <ST-1>

Ignition switch: ON

Steering wheel: Turn

1 - 2 V and 2.5 - 4.5 V

are displayed alter-

nately.

Steering wheel sensor

voltage <ST-2>

Ignition switch: ON

Steering wheel: Turn

1 - 2 V and 2.5 - 4.5 V

are displayed alter-

nately.

Steering wheel sensor

ST N

Ignition switch: ON

Steering wheel: Neutral

1 - 2 V

voltage <ST-N>

Steering wheel: Turn

2.5 - 4.5 V

Idle switch

Ignition switch: ON

Accelerator

pedal:

Full

closed

Accelerator pedal: Press

OFF

Steering wheel sensor

ST N

Ignition switch: ON

steering wheel: Neutral

<ST-N>

Steering wheel: Turn from

the neutral position

OFF

Steering wheel sensor

<ST-1>

Ignition switch: ON

Steering wheel: Turn slowly

ON and OFF are dis-

played alternaltely.

Steering wheel sensor

<ST-2>

Ignition switch: ON

Steering wheel: Turn slowly

ON and OFF are dis-

played alternately

Steering wheel sensor

learning <ST-N>

Perform actual driving

Steering wheel sensor neu-

tral position learning exe-

cuted

Steering wheel sensor neu-

tral position learning unex-

ecuted

OFF

Stop lamp switch

Ignition switch: ON

Brake pedal: Depress

Engine: Stopped

Brake pedal: Release

OFF

Motor monitor

Electric pump motor is currently operating

Electric pump motor is currently not operating

OFF

Oil pressure state

Electric pump motor is currently operating

LOW

Electric pump motor is currently not operating

HIGH

Directional valve

Ri ht

AYC clutch right side is currently operating

<Right>

AYC clutch right side is currently not operating

OFF

Directional valve

L ft

AYC clutch left side is currently operating

<Left>

AYC clutch left side is currently not operating

OFF

ABS monitor

ABS is currently operating

ABS is currently not operating

OFF

Parking brake switch

Ignition switch: ON

Parking brake lever: Pull

Engine:Stopped

Parking brake lever: Re-

lease

OFF

ACD mode switch

Ignition switch: ON

ACD mode switch: Press

Engine:Stopped

ACD mode switch: Release

OFF

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-37

ACTUATOR TEST JUDGEMENT VALUE

Item

no.

Check item

Test description

Normal state

Bleeding <ACD>

Input current to the Proportional valve

according to the steering angle, and operate

the Proportional valve for five minutes.

Make sure no air leaks from the bleeder

screw on the transfer.

Bleeding <AYC>

Input current to the Proportional valve

according to the steering angle, and operate

the directional valve for five minutes.

Make sure no air leaks from the bleeder

screw on the torque transfer differential.

Check the oil vol-

ume

Operate the directional valve to the left and

right for 20 seconds.

Check that the oil volume of the reservoir

tank is appropriate.

Electric

pump

drive

Operate the electric pump for 5 seconds.

Operation sounds of the electric pump

can be heard.

Check the opera-

tions of the ACD

Operate the Proportional valve <ACD> and

supply the maximum oil pressure to the multi

plate clutch.

9Generate the tight corner braking

phenomenon.

Check clutch op-

erations <Left>

Operate the direction valve and supply the

maximum oil pressure to the left clutch.

When the wheels are lifted, speed

difference will occur between the rear

left and right wheels.

Check clutch op-

erations <Right>

Operate the direction valve and supply the

maximum oil pressure to the right clutch.

When the wheels are lifted, speed

difference will occur between the rear

left and right wheels.

Control OFF

Turn OFF the electric pump relay, and turn

OFF the control of the ACD and AYC.

In actual driving, there is difference

between control ON and OFF.

(1) The actuator test can be executed only when all the following conditions are satisfied.

All wheel speed sensor inputs below 20 km/h

No system malfunction detected

Steering angle is within ±30 degrees from the neutral position

(2) When the actuator test corresponds to one of the following conditions, forced driving will be cleared.

When any one of the wheel speed sensor input is detected to be above 20 km/h (excluding

Item No.08 “Control OFF”.)

When system malfunction is detected (excluding diagnostic code No.82, 84, and 85)

When the forced drive time is exceeded

When the MUT-II is removed

When the Clear key of the MUT-II is operated

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-38

CHECK AT 4WD-ECU TERMINALS

NOTE:

1. *

indicates the eliminated terminal when only ACD is installed.

2. *

indicates the terminal added when only ACD is installed.

Termi-

nal no.

Check item

Check condition

Normal state

Proportional

valve

<ACD>

Operate the Proportional

valve in the actuator test

While executing the actuator test

System voltage

<ACD>

valve in the actuator test

(Item No.01). <ACD>

After completing the actuator test

1 V or less

Proportional

valve

<AYC>

Operate the Proportional

valve in the actuator test

While executing the actuator test

System voltage

<AYC>

valve in the actuator test

(Item No. 02). <AYC>

After completing the actuator test

1 V or less

Wheel speed sensor

Vehicle is stopping

1 V or less

<FL>

Moving forward slowly

0 ↔ 5 V flushing

Wheel speed sensor

Vehicle is stopping

1 V or less

<RR>

Moving forward slowly

0 ↔ 5 V flushing

Wheel speed sensor

Vehicle is stopping

1 V or less

<RL>

Moving forward slowly

0 ↔ 5 V flushing

Wheel speed sensor

Vehicle is stopping

1 V or less

<FR>

Moving forward slowly

0 ↔ 5 V flushing

Pressure sensor earth

Any time

1 V or less

Lateral G sensor

Ignition switch: ON
Vehicle horizontal state

2.4 - 2.6 V

4WD-ECU power sup-

Ignition switch: OFF

0 V

ply

Ignition switch: ON

System voltage

14*

Directional

valve

<Right>

Operate the directional

valve <right> in the

While executing the actuator test

System voltage

<Right>

valve <right> in the

actuator test (Item No.

07)

After completing the actuator test

1 V or less

15*

Directional

valve

<Left>

Operate the directional

valve <left> in the actua

While executing the actuator test

System voltage

<Left>

valve <left> in the actua-

tor test (Item No. 06)

After completing the actuator test

1 V or less

Electric pump relay

When the electric pump motor is not operating

0 V

power supply

While the electric pump motor is operating

System voltage

19*

Wheel speed sensor

earth <FL>

Any time

1 V or less

20*

Wheel speed sensor

earth <RR>

Any time

1 V or less

21*

Wheel speed sensor

earth <RL>

Any time

1 V or less

22*

Wheel speed sensor

earth <FR>

Any time

1 V or less

Longitudinal G sensor

Ignition switch: ON
Vehicle horizontal state

2.4 - 2.6 V

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