Mitsubishi Montero Sport (2004+). Manual - part 508

 

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Mitsubishi Montero Sport (2004+). Manual - part 508

 

 

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54-19

NOTE: After inspecting IOD storage connector A-54X, inspect 
the wire. If IOD storage connector A-54X is damaged, repair or 
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion 

P.00E-2

.

Q: Are the harness wires between fusible link number 8 

and key reminder switch connector D-16 (terminal No.1) 
in good condition?
YES : 
Go to Step 12.
NO :  Repair or replace them. Then check that the 

malfunction is eliminated.

STEP 12. Check the harness wires between key reminder 
switch connector D-16 (terminal No.2 and 6) and 

ETACS-ECU connector D-11 (terminal No.8 and 12).

AC200774

2

1

CONNECTOR: A-54X

AB

A-54X

AC202060

4

5

3

1

6

7

2

1

2

4

5

3

6

8

9

7

10

11

13

14

12

16

17

201918

15

AC201086

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54-20

NOTE: After inspecting intermediate connector C-72, junction 
block D-13, inspect the wire. If intermediate connector C-72, 
junction block D-13 are damaged, repair or replace them. Refer 
to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Are the harness wires between key reminder switch 

connector D-16 (terminal No.2 and 6) and ETACS-ECU 
connector D-11 (terminal No.8 and12) in good 
condition?
YES : 
Replace the ETAS-ECU.
NO :  Go to step 13.

STEP 13. Check for continuity between terminals (except 
terminal No. 4 and No. 6) of key reminder switch connector 
D-16.

(1) Measure at key reminder switch connector D-16 without 

disconnecting the connector.

(2) Check that there is no continuity between key reminder 

switch terminal No. 4 and each terminal (except terminal 
No. 6), as well as between key reminder switch terminal 
No.6 and each terminal (except terminal No. 4).

Q: Does continuity exist between terminals?

YES : Replace the key reminder switch. If the functions, 

which are described in "CIRCUIT OPERATION", work 
normally, the input signal from the key reminder 
switch should be normal.

NO :  Go to Step 14.

STEP 14. Recheck for malfunction.
Q: Is a malfunction eliminated?

YES : This procedure is complete. (If no malfunctions are 

found in all steps, an intermittent malfunction is 
suspected. Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Point 

− How to 

Cope with Intermittent Malfunction 

P.00-7

.)

NO :  Go to Step 1.

8

19

7

6

5

16

15

17 18

4

3

2

10 11 12 13

1
9

14

AC201910

CONNECTOR: C-72

AB

C-72 (B)

AC202060

4

5

3

1

6

7

2

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54-21

INSPECTION PROCEDURE 2: The Ignition Key Hole Illumination Light does not Go Out.

.

CIRCUIT OPERATION
Refer to Inspection Procedure 1 

P.54-11

.

.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a short circuit n the harness or 
a defective ETACS-ECU.

.

TROUBLESHOOTING HINTS

• Damaged harness wire or connector

• Malfunction of the ETACS-ECU

.

DIAGNOSIS

Required Special Tools:

• MB991529: Diagnostic Trouble Code Check Harness

• MB991958: Scan Tool (MUT-III Sub Assembly)

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

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B (Vehicles without 

CAN communication system)

STEP 1. Check the input signal (by using pulse check).

Check the ETACS-ECU input signal (driver’s side door switch) 
by using scan tool MB991958.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Check that the tone alarm of scan tool MB991958 sounds 

when the driver's side door is opened.

Q: Does the tone alarm of scan tool MB991958 sound when 

the input signal enters?
YES : 
Replace the ETACS-ECU. Check that the malfunction 

is eliminated.

NO :  Go to Step 3.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54-22

STEP 2. Check the input signal from the driver's side door 
switch (by using a voltmeter).

Check the input signals from the following switches:
(1) Use special tool MB991529 to connect a voltmeter between 

ground terminal 4 or 5 and ETACS-ECU terminal 9 of the 
data link connector.

(2) Check that the voltmeter indicator deflects once when the 

input signal enters.

Q: Does the voltmeter indicator deflect?

YES : Replace the ETACS-ECU. Check that the malfunction 

is eliminated.

NO :  Go to Step 3.

STEP 3. Check the driver's side door switch.

Remove the driver's side door switch. Refer to GROUP 42, 
Door 

P.42-132

.

Q: Is the driver's side door switch in good condition?

YES : Go to Step 4.
NO :  Replace it. Check that the malfunction is eliminated.

STEP 4. Check the driver's side door switch ground circuit.

Measure the resistance between the driver's side door switch 
body (metal section) and ground.

• The measured value should be 2 ohms or less.

Q: Does the measured resistance value correspond with 

this range?
YES : 
Go to Step 5.
NO :  Repair the harness wire or connector.

AC003527

GROUNDED TERMINAL

ETACS-ECU 
TERMINAL

MB991529

AB

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Released (ON)

− 2, 1 − 3, 2 − 3 Less than 2 ohms

Depressed (OFF) 1 

− 2, 1 − 3, 2 − 3 Open circuit

AC002733 AB

1

2

3

AC002734

 

 

 

 

 

 

 

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