Mitsubishi Evolution X. Manual - part 913

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-13

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC TROUBLE SHOOTING

M1543006900937

Refer to Group 00 

− Contents of troubleshooting 

P.00-7

.

DIAGNOSIS FUNCTION

M1543007001093

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Test harness
b. LED harness
c. LED harness 

adaptor

d. Probe

General service tools Continuity check and voltage 

measurement at harness wire or 
connector

a. Connector pin contact 

pressure inspection

b. Power circuit inspection
c. Power circuit inspection
d. Commercial tester connection

MB992006
Extra fine probe

−

Continuity check and voltage 
measurement at harness wire or 
connector.

Tool

Tool number and 
name

Supersession

Application

MB991223

a

d

c

b

DO NOT USE

BA

MB992006

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-14

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF) 

position.

2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 

and the personal computer.

4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON" 

position.
NOTE: When special tool MB991824 is energized, special 
tool MB991824 indicator light will be illuminated in a green 
color.

7. Start the M.U.T.-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the 
connecting sequence, making sure that the ignition switch is at 
the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC 
TROUBLE CODES

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

NOTE: If the battery voltage is low, diagnostic trouble codes will 
not be set. Check the battery if scan tool MB991958 does not 
display.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "System select" from the start-up screen.
4. Select "From 2006 MY" of "Model Year." When the "Vehicle 

Information" is displayed, check the contents.

5. Select "ETACS" from "System List", and press the "OK" 

button.
NOTE: When the "Loading Option Setup" list is displayed, 
check the applicable item.

6. Select "Diagnostic Trouble Code."
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-15

TROUBLE SYMPTOM CHART

M1543007202454

SYMPTOM PROCEDURES

Ignition key cylinder illumination light does not illuminate/extinguish normally. <vehicles with WCM>

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

.

Trouble symptom

Reference 
page

Ignition key cylinder illumination light does not 
illuminate/extinguish normally.

vehicles with WCM

P.54A-15

Ignition Key Cylinder Illumination Light Circuit <Vehicles with WCM>

KEY
REMINDER
SWITCH
WHEN
REMOVING
KEY: ON

IGNITION KEY
CYLINDER
ILLUMINATION
LIGHT

ETACS-ECU

AC708953AC

Connector: C-211

AC708972AU

Connector: C-315

ETACS-ECU

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-16

OPERATION

The ETACS-ECU operates this function in accor-
dance with the input signals below.

• Ignition switch (IG1)

• Key reminder switch

• Driver's door switch

• Driver's door lock actuator

.

TECHNICAL DESCRIPTION (COMMENT)

If this function does not work normally, these input 
signal circuit(s), the ignition key cylinder illumination 
light or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The key reminder switch may be defective

• The driver's door switch may be defective 

• The driver's door lock actuator may be defective 

• The ignition key cylinder illumination light bulb 

may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

STEP 1. Using scan tool MB991958, read the diagnostic 
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

scan tool (M.U.T.-III) 

P.54A-13

."

(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU. Refer to 

P.54A-676

.

NO :  Go to Step 2.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB