Mitsubishi Montero Sport (2004+). Manual - part 491

SEAT BELT DIAGNOSIS

TSB Revision

INTERIOR

52A-9

STEPS 4. Check the harness wires between ignition switch 
(IG1) and ETACS-ECU connector D-11 (terminal No. 3).

NOTE: Check the intermediate connector D-08, and then the 
wiring harness. If the intermediate connector D-08 is damaged, 
repair or replace it. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. If the connector has been repaired or 

replaced, go to Step 7.
Q: Is the harness wore between the ignition switch (IG

1

) 

and the ETACS-ECU connector D-11 (terminal No. 3) in 
good condition?
YES : Go to Step 7.
NO :  Repair them. Then go to Step 7.

STEP 5. Measure the ground line resistance at the junction 
block connector D-11.

Check for continuity between terminal 10 and the ground.

• The measured value should be 2 ohms or less.

Q: Does the measured resistance value correspond with 

this range?
YES : Go to step 7.
NO :  Go to Step 6.

AC201085

1

2

3

4

CONNECTORS: D-08, D-11

AB

D-08

D-11

COMPONENT SIDE

COMPONENT SIDE

JUNCTION BLOCK (REAR)

AC003231

D-11 HARNESS CONNECTOR:
COMPONENT SIDE

AC

SEAT BELT DIAGNOSIS

TSB Revision

INTERIOR

52A-10

STEP 6. Check the harness wires between the ETACS-ECU 
connector D-11 (terminal No. 10) and the ground.

NOTE: Check the intermediate connector D-13, and then the 
wiring harness. If the intermediate connector D-13 is damaged 
repair or replace it. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then go to Step 7.

Q: Are the harness wires between the ETACS-ECU 

connector D-11 (terminal No.10) and the ground in good 
condition?
YES : Go to Step 7.
NO :  Repair it. Then go to Step 7.

STEP 7. Retest the system.
Q: Does the seat belt tone alarm sound, or does the seat 

belt warning light illuminate or flash?
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 Points 

− How to 

Cope with Intermittent Malfunction 

P.00-7

.) 

NO :  There is no action to be taken.

1

2

4

5

3

6

8

9

7

10

11

13

14

12

16

17

201918

15

AC201086

SEAT BELT DIAGNOSIS

TSB Revision

INTERIOR

52A-11

INSPECTION PROCEDURE 2: When the Seat Belt is not Fastened and the Ignition Switch is Turned to 
the "ON" Position, the Seat Belt Warning Light Illuminates or Flashed, but the Seat Belt Tone Alarm 
does not Sound.

.

CIRCUIT OPERATION

• The system determines whether the seat belt is 

fastened by the seat belt switch.

• The system flashes the seat belt warning light for 

6 seconds after the ignition switch is turned "ON," 
and also sounds the seat belt tone alarm if the 
seat belt is not fastened.

AC004181AB

Seat Belt Switch Circuit

AC003228AC

CONNECTORS: D-11, D-13

D-13

D-11

JUNCTION
BLOCK (REAR)

AC003235

E-42

E-35

CONNECTORS: E-35, E-42

AB

SEAT BELT DIAGNOSIS

TSB Revision

INTERIOR

52A-12

.

TECHNICAL DESCRIPTION (COMMENT)
There may be a malfunction in the seat belt buckle 
switch circuit.

.

TROUBLESHOOTING HINTS

• Malfunction of the seat belt buckle switch

• Malfunction of the ETACS-ECU

• Damaged wiring harnesses or connectors

DIAGNOSIS

.

Required Special Tols:

• 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)

• MB991529: Diagnostic Trouble Code Check Harness

.