Mitsubishi Montero Sport (2004+). Manual - part 577

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-295

DIAGNOSIS

Required Special Tools:

• MB991223: Test Harness Set

• MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the key reminder switch.

(1) Remove the driver's side under cover.
(2) Remove the column cover lower and upper.

(3) Disconnect the wiring connector from the key reminder 

switch.

(4) Check for continuity between the terminal when the ignition 

key is pulled out and inserted into the steering lock cylinder.

Q: Is key reminder switch in good condition?

YES : Go to Step 2.
NO :  Replace the ignition key reminder switch.

STEP 2. Check key reminder switch connector D-16 and 
ETACS-ECU connector D-11 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

Q: Are key reminder switch connector D-16 and 

ETACS-ECU connector D-11 in good condition?
YES : Go to Step 3.
NO :  Repair or replace them. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

.

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Removed

4 

− 6

Less than 2 ohms

Inserted

4 

− 6

Open circuit

AC002730

AC202060

4

5

3

1

6

7

2

AC201084

JUNCTION 
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

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STEP 3. Check the harness wires between key reminder 
switch connector D-16 (terminal No.6) and ETACS-ECU 
connector D-11 (terminal No.8) for damage.

NOTE: After checking intermediate connector C-72 and junc-
tion block connector D-13, check the wires. If intermediate con-
nector C-72 and junction block connector D-13 are damaged, 
repair or replace them. Refer to GROUP 00E, Harness Con-
nector Inspection 

P.00E-2

.

Q: Are the harness wires between key reminder switch 

connector D-16 (terminal No.6) and ETACS-ECU 
connector D-11 (terminal No.8) in good condition?
YES : Go to Step 4.
NO :  Repair or replace them. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

.

1

2

4

5

3

6

8

9

7

10

11

13

14

12

16

17

201918

15

AC201086

AC202060

4

5

3

1

6

7

2

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)

THEFT ALARM

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CHASSIS ELECTRICAL

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STEP 4. Check for continuity between terminals (except 
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 5.

STEP 5. 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.

AC202060

4

5

3

1

6

7

2

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-298

INSPECTION PROCEDURE 7: The Hood Switch is not Input.

AC004184

Hood Switch Input Circuit

AC003529

CONNECTOR: A-94

AC

A-94 (B)

AC004012

CONNECTOR: C-14

AC

C-14