Mitsubishi Montero Sport (2004+). Manual - part 457

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42-83

STEP 3. Check the ETACS-ECU input signal from the key 
reminder switch (by using a voltmeter).
(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 

key reminder switch is operated <key in (off)/key out (on)>.

Q: Does the voltmeter indicator deflect?

YES : Replace the ETACS-ECU and then go to Step 19.
NO :  Go to Step 6.

STEP 4. Check the input signal from the front driver's door 
switch (by using a voltmeter).
(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 

front driver's door switch is operated <open (on)/depressed 
(off)>.

Q: Does the voltmeter indicator deflect?

YES : Replace the ETACS-ECU and then go to Step 19.
NO :  Go to Step 11.

STEP 5. Check the input signal from the Front passenger's 
door switch (by using a voltmeter).
(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 

front passenger's door switch is operated <open 
(on)/depressed (off)>.

Q: Does the voltmeter indicator deflect?

YES : Replace the ETACS-ECU and then go to Step 19.
NO :  Go to Step 15.

7

6

5

4

3

2

1

14

13

12

11

10

9

8

16

15

AC004323

MB991529

GROUND TERMINAL

ETACS TERMINAL

AB

7

6

5

4

3

2

1

14

13

12

11

10

9

8

16

15

AC004323

MB991529

GROUND TERMINAL

ETACS TERMINAL

AB

7

6

5

4

3

2

1

14

13

12

11

10

9

8

16

15

AC004323

MB991529

GROUND TERMINAL

ETACS TERMINAL

AB

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STEP 6. Check key reminder switch connector D-16 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is key reminder switch connector D-16 in good 

condition?
YES : Go to step 7.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E 

P.00E-2

, Harness Connector inspection. 

Then go to Step 19.

STEP 7. Check the key reminder switch.
(1) Remove the driver's side under cover.
(2) Remove the column cover, lower and upper.
(3) Disconnect the key reminder switch connector and measure 

at the key reminder switch side.

(4) Measure the resistance between terminal numbers 4 and 6.
(5) Follow the table below to check the key reminder switch 

continuity.

Q: Is the key reminder switch damaged?

YES : Replace the key reminder switch, then go to Step 19.
NO :  Go to Step 8.

STEP 8. Check ETACS-ECU connector D-11 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector D-11 in good condition?

YES : Go to step 9.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E 

P.00E-2

, Harness Connector inspection. 

Then go to Step 19.

AC202060

4

5

3

1

6

7

2

CONNECTOR: D-16

AD

COMPONENT 
SIDE

D-16

STATUS OF 
IGNITION KEY

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Key removed

4 

− 6

Less than 2 ohms

Key inserted

4 

− 6

Open circuit 

AC202060

4

5

3

1

6

7

2

CONNECTOR: D-16

AD

COMPONENT 
SIDE

D-16

AC201084

JUNCTION 
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

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STEP 9. Check the harness wire between ETACS-ECU 
connector D-11 (terminal No.8) and key reminder switch 
connectors D-16 (terminalNo.6). 

NOTE: After inspecting intermediate connector C-72, junction 
block connector D-13 inspect the wires. If intermediate connec-
tor C-72, junction block connector D-13 is damaged, repair or 
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion 

P.00E-2

. Then go to Step 19.

Q: Are there any damaged harness wires?

YES : Repair or replace the harness wire, then go to Step 

19.

NO :  Go to Step 10.

AC201084

JUNCTION 
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

AC202060

4

5

3

1

6

7

2

CONNECTOR: D-16

AD

COMPONENT 
SIDE

D-16

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)

AC200758

1

10

2

11

3

12

4

13

14

15

5

16

6

17

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18

8

19

9

20

CONNECTOR: D-13

AC

COMPONENT SIDE

JUNCTION BLOCK 
(REAR SIDE)

D-13

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STEP 10. Check the harness wire between key reminder 
switch connector D-16 (terminal No.4)  and ground.
Q: Is the harness wire between key reminder switch 

connector D-16 (terminal No.4)  and ground damaged?
YES : Repair or replace the harness wire, then go to Step 

19.

NO :  Replace the ETACS-ECU and then go to Step 19.

STEP 11. Check front driver's door switch connector E-33 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is front driver's door switch connector E-33 in good 

condition?
YES : Go to step 12.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E 

P.00E-2

, Harness Connector inspection. 

Then go to Step 19.

STEP 12. Check the front driver’s door switch.
(1) Remove the front driver's door switch (Refer to 

P.42-132

).

(2) Follow the table to check the front driver’s door switch 

continuity.
TYPE1

TYPE2

Q: Is the front driver’s door switch in good condition?

YES : Go to Step 13 .
NO :  Replace front driver’s door switch, then go to Step 19. 

AC202060

4

5

3

1

6

7

2

CONNECTOR: D-16

AD

COMPONENT 
SIDE

D-16

AC004329AL

E-33

CONNECTOR: E-33

COMPONENT SIDE

2 1

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Released (ON)

1 

− 2, 1 − 3, 2 − 3 Less than 2 ohms

Depressed (OFF) 1 

− 2, 1 − 3, 2 − 3 Open circuit 

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Released (ON)

1 

− 2 

Less than 2 ohms

Depressed (OFF) 1 

− 2 

Open circuit 

AC003906

TYPE 1

AB

1

2

3

OFF

ON

STROKE

AC003907

TYPE 2

1

2

ON

OFF

STROKE

AB