Mitsubishi Evolution X. Manual - part 594

KEYLESS OPERATION KEY

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-283

<<B>> UPPER COVER REMOVAL

CAUTION

Do not allow water or dust to enter the inside of the trans-
mitter assembly when it is open. Also, do not touch the 
precision electronic device.
Place a flat-tipped screwdriver wrapped with protective tape as 
shown in the figure, and lever the keyless operation key to 
remove.

ASSEMBLY SERVICE POINT

.

>>A<< BATTERY INSTALLATION

CAUTION

Do not allow water or dust to enter the inside of the trans-
mitter assembly when it is open. Also, do not touch the 
precision electronic device.
Install a new battery with the positive side facing toward the 
lower cover.

Replacement battery: Coin-type lithium battery 
CR2032

AC609037

AB

Flat-tipped screwdriver

Upper cover

AC609442

AC609035

+

Battery

Transmitter assembly

Lower cover

–

AB

KEYLESS OPERATION KEY

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KEYLESS OPERATION SYSTEM (KOS)

42B-284

INSPECTION

M1429604100044

KEYLESS OPERATION KEY BATTERY CHECK

Measure the voltage of the battery. If the voltage of the battery 
is lower than the standard value, replace the battery.

Standard value:2.5 

− 3.2 V

AC004486

TPMS TRANSMITTER

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KEYLESS OPERATION SYSTEM (KOS)

42B-285

TPMS TRANSMITTER

REMOVAL AND INSTALLATION

M1429613000012

CAUTION

• Do not vary the angle of valve except at mounting on the rim. If varying the angle over and over, it 

may cause breakage of antenna plate resulting in the failure of TPMS transmitter.

• Ensure valve cap is always in place except when adjusting tire pressure.
• If the valve core and valve cap are replaced, use a genuine replacement part. The valve core is 

similar to a conventional one, but uses nickel plating to avoid corrosion.

• Replace the seal and seal washer with a new one every five years or when the tire is replaced.
• Do not drop the TPMS transmitter from height greater than 1 meter (3.3 feet).
• Do not expose the TPMS transmitter to extraneous magnetic fields.
• TPMS transmitter should not be stored at temperatures above 80° C (176° F).
• TPMS transmitter should not be exposed to temperatures above 100° C (212° F).
• If the TPMS transmitter is replaced, execute "Tire Pressure Sensor ID Registration" on scan tool 

MB991958 "Special Function." 

• Be careful not to damage the TPMS transmitter.

Pre-removal Operation
• Wheel and Tire Removal

Post-installation Operation
• Wheel and Tire Installation

• Tire Pressure Sensor ID Registration If a new TPMS 

transmitter is installed (Refer to 

P.42B-12

).

• After the tire pressure sensor ID registration, check that 

the TPMS warning light does not illuminate or flash.

AC610443

1

3

2

4

5

N

8.0 ± 0.5 N·m
71 ± 4 in-lb

0.25 N·m
2.5 in-lb

6

AB

Removal steps 

<<A>>

1.

Cap

<<A>>

2.

Valve core

<<A>>

3.

Nut

•

Let TPMS transmitter fall into 
tire

Removal steps (Continued)

TPMS TRANSMITTER

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-286

REMOVAL SERVICE POINTS

.

<<A>> CAP/VALVE CORE/NUT REMOVAL

CAUTION

Ensure cap is always in place except when adjusting tire 
pressure.
1. Remove the cap and valve core to deflate the tire.
2. Once tire pressure is released, remove nut and let TPMS 

transmitter fall into tire.

.

<<B>> TPMS TRANSMITTER REMOVAL

CAUTION

Be careful not to damage the TPMS transmitter.
1. Place on tire changing machine and break both tire beads 

ensuring that the TPMS transmitter remains in the bottom of 
the tire.

2. Lubricate tire well and remove outer side of the tire.
3. Reach inside the tire and remove the TPMS transmitter.
4. Remove tire from rim using proper tire changing equipment 

procedures.

.

•

Tire bead

<<B>>

4.

TPMS transmitter

<<C>>

5.

Seal

<<C>>

6.

Seal washer
Installation steps 

>>A<<

6.

Seal washer

>>A<<

5.

Seal

>>A<<

4.

TPMS transmitter

>>A<<

3.

Nut

>>B<<

•

Tire bead mounting

2.

Valve core

>>C<<

•

Tire pressure inflation

>>C<<

•

Valve nut retightening

1.

Cap

Removal steps (Continued)

AC611412AB

TPMS
transmitter