Mitsubishi Evolution X. Manual - part 914

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-17

STEP 2. Using scan tool MB991958, check data list.
Use the ETACS-ECU data list to check the signals related to 
the ignition key cylinder illumination light function.

• Turn the ignition switch to the "LOCK" (OFF) position.

• Remove the ignition key from the ignition key cylinder.

• Open the driver's door.

Q: Does scan tool MB991958 display the items "Dr door 

unlock", "Dr door ajar switch", and "Handle lock 
switch" as normal condition?
YES <Normal conditions are displayed for all the 
items.>  : Go to Step 3.
NO <Normal condition is not displayed for item No. 
228.>  : Troubleshoot the ETACS-ECU. Refer to GROUP 

54A, Diagnosis - Inspection Procedure 4 
"ETACS-ECU does not receive any signal from the 
front door lock actuator" 

P.54A-647

.

NO <Normal condition is not displayed for item No. 
254.>  : Troubleshoot the ETACS-ECU. Refer to GROUP 

54A, Diagnosis - Inspection Procedure 2 
"ETACS-ECU does not receive any signal from the 
ignition switch (IG1)" 

P.54A-642

.

NO <Normal condition is not displayed for item No. 
256.>  : Troubleshoot the ETACS-ECU. Refer to GROUP 

54A, Diagnosis - Inspection Procedure 6 
"ETACS-ECU does not receive any signal from the 
front the front door switch (RH)" 

P.54A-656

.

NO <Normal condition is not displayed for item No. 
264.>  : Troubleshoot the ETACS-ECU. Refer to GROUP 

54A, Diagnosis - Inspection Procedure 3 
"ETACS-ECU does not receive any signal from key 
reminder switch" 

P.54A-644

.

NO <Normal condition is not displayed for item No. 270, 
271.>  : Troubleshoot the ETACS-ECU. Refer to GROUP 

54A, Diagnosis - Inspection Procedure 4 
"ETACS-ECU does not receive any signal from front 
door lock actuator" 

P.54A-647

.

Item No.

Item name

Normal conditions

Item 228

Dr door unlock

ON

Item 254

IG voltage

0 V

Item 256

Dr door ajar switch

Open

Item 264

Handle lock switch

Key in 

→ Key out

Item 270

Dr door lock switch

Not lock

Item 271

Dr door unlock switch

Unlock

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-18

STEP 3. Check key reminder switch connector C-211, 
ETACS-ECU connector C-315 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is key reminder switch connector C-211, ETACS-ECU 

connector C-315 in good condition?
YES : Go to Step 4.
NO :  Repair the damaged parts.

STEP 4.Check the wiring harness between key reminder 
switch connector C-211 (terminal No. 3,5) and ETACS-ECU 
connector C-315 (terminal No. 13,18).

• Check the input/output line for open circuit.

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Repair the wiring harness between key reminder 

switch connector C-211 and ETACS-ECU connector 
C-315.

STEP 5. Check of ignition key cylinder illumination light 
bulb.
Q: Is the ignition key cylinder illumination light bulb in 

good condition?
YES : Go to Step 6.
NO :  Replace the bulb of the ignition key cylinder 

illumination light.

STEP 6. Check the wiring harness between key reminder 
switch connector C-211 (terminal No. 7) and body ground.

• Check the ground line for open circuit.

Q: Is the check result normal?

YES : Go to Step 7.
NO :  Repair the wiring harness between key reminder 

switch connector C-211 and body ground.

STEP 7. Retest the system.
Q: Does the ignition key cylinder illumination light 

illuminate/extinguish in good condition?
YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to use 
Troubleshooting/inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the ETACS-ECU.

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-19

ON-VEHICLE SERVICE

CHECK OF IGNITION KEY REMINDER WARNING 
FUNCTION (STEERING LOCK REMINDER 
BUZZER BY KOS)

M1541200700085

1. Driver's door: Release the closed and steering wheel lock, 

or turn the ignition key <vehicles with WCM> or emergency 
key <vehicles with KOS> to the LOCK (OFF) position (key 
inserted).

2. Change the driver's door state from closed to open.
3. Check that the buzzer sounds normally.
4. If a malfunction is found, carry out the troubleshooting 

(Refer to 

P.54A-59

).

REMOVAL AND INSTALLATION

M1541200300399

CAUTION

Before removing the steering wheel assembly, refer to GROUP 52B 

− Service Precautions 

P.52B-25

 

and Driver’s Air Bag Module and Clock Spring 

P.52B-386

 <Vehicles with WCM>.

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-20

CAUTION

After the installation, perform a calibration for the ASC-ECU to learn the steering wheel sensor neutral 
point (Refer to GROUP 35C, On-vehicle Service 

− Steering Wheel Sensor Calibration 

P.35C-267

). 

<Vehicles with WCM and ASC>

Pre-removal Operation
• Steering wheel straight-ahead position check. <Vehicles 

with WCM>

• Removal of steering wheel assembly (Refer to GROUP 

37 

− Steering Wheel 

P.37-22

). <Vehicles with WCM>

Post-installation Operation
• Installation of steering wheel assembly (Refer to GROUP 

37 

− Steering Wheel 

P.37-22

). <Vehicles with WCM>

• Steering wheel straight-ahead position check. <Vehicles 

with WCM>

AC708361

AC706806

AC708246

4

3

4

3

4

3

3

7

7

2

4

4

5

6

10

5

AC

1

6

3

2

9

8

B

B

C

C

A

A

B

B

C

C

A

A

Section A-A

Section C-C

Section B-B

NOTE: 
Claw position is symmetrical

<Vehicles with KOS>

<Vehicles without KOS>

Claw

Claw

Claw

2.0 ± 0.5 N·m
18 ± 4 in-lb

2.0 ± 0.5 N·m
18 ± 4 in-lb

2.0 ± 0.5 N·m
18 ± 4 in-lb

7.0 ± 3.0 N·m
62 ± 27 in-lb

Removal Steps 

1.

IG knob cap <Vehicles with KOS>

2.

Ignition key cover

3.

Steering column cover lower

4.

Steering column cover upper

Removal Steps (Continued)