Mitsubishi Montero Sport (2004+). Manual - part 535

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54-127

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

Check the input signal from the driver’s side door switch by 
using scan tool MB991958.

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 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 

malfunctions are eliminated.

NO :  Go to Step 3.

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 

malfunctions are eliminated.

NO :  Go to Step 3.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

AC003527

GROUNDED TERMINAL

ETACS-ECU 
TERMINAL

MB991529

AB

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54-128

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

(1) Remove the driver's side door switch. Refer to GROUP 42, 

Door 

P.42-132

.

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

continuity.

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. Then go to Step 

6.

STEP 5. Check driver's side door switch connector E-33 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.

Q: Is driver's side door switch connector E-33 damaged?

YES : Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. The tachometer 

should work normally.

NO :  Go to Step 6.

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

AC002733 AB

1

2

3

AC002734

AC201938

2 1

CONNECTOR: E-33

COMPONENT 
SIDE

E-33

AB

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54-129

STEP 6. Check driver's side door switch connector E-33 
input circuit.

(1) Disconnect driver's side door switch connector E-33 and the 

harness side.

(2) Measure the voltage between terminal 2 and ground.

• The measured value should be approximately 5 volts.

Q: Does the measured voltage correspond with this range?

YES : There is no action to be taken.
NO :  Go to Step 7.

AC201938

2 1

CONNECTOR: E-33

COMPONENT 
SIDE

E-33

AB

AC002735

CONNECTOR E-33
(HARNESS SIDE)

AB

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54-130

STEP 7. Check the harness wires between driver's side 
door switch connector E-33 (terminal No.2) and 
ETACS-ECU connector D-11 (terminal No.9).

AC201939

1

3

4

7 6 5

2

9

11

12

10

13

8

1
8

3

4

5

7 6

10

15

16

14

12

13

11

9

2

CONNECTORS: D-11, D-14

D-11

D-14 (B)

D-11 COMPONENT SIDE

D-14 COMPONENT SIDE

AB

JUNCTION BLOCK
 (FRONT)

AC201940

2 1

8

19

7

6

5

16

15

17 18

4

3

2

10 11 12 13

1
9

14

CONNECTORS: E-33, E-42

AC

E-33 (B)

E-42

COMPONENT SIDE

E-42