Mitsubishi Montero (2004+). Manual - part 1182

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-63

STEP 3. Check SRS-ECU connector E-07 and driver’s seat 
belt pre-tensioner connector F-27. (Using scan tool 
MB991958, read the diagnostic trouble code).
(1) Disconnect the negative battery terminal.
(2) Disconnection connectors E-07 and F-27, and then 

reconnect them.

(3) Connect the negative battery terminal.
(4) Erase the diagnostic trouble code memory, and check the 

diagnostic trouble code.

Q: Is DTC 26 set?

YES : Go to Step 4.
NO :  The procedure is complete. (It is assumed that DTC 

26 set as connector E-07 or F-27 was engaged 
improperly).

ACX01478AJ

CONNECTOR: E-07

E-07 (Y)

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25 26 27 28 29 30 31 32 33

21 22

23 24

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204126

AD

CONNECTOR: F-27

F-27 (R)

CENTER 
PILLAR

1 2

HARNESS SIDE
CONNECTOR
(REAR VIEW)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-64

STEP 4. Check the driver's seat belt pre-tensioner. (Using 
scan tool MB991958, read the diagnostic trouble code).
(1) Disconnect the negative battery terminal.
(2) Disconnect the driver's seat belt pretensioner connector 

F-27.

(3) Connect special tool MB991865 to special tool MB991866.

CAUTION

Do not insert a test probe into the terminal from its front 
side directly as the connector contact pressure may be 
weakened.
(4) Insert special tool MB991866 into the harness connector by 

backprobing.

(5) Connect the negative battery terminal.
(6) Erase diagnostic trouble code memory, and check the 

diagnostic trouble code.

Q: Is DTC 26 set?

YES : Go to Step 5.
NO :  Replace the driver's seat belt pre-tensioner (Refer to 

P.52B-229

). Then go to Step 7.

AC204126

AD

CONNECTOR: F-27

F-27 (R)

CENTER 
PILLAR

1 2

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC006042 AY

MB991866
(RESISTOR HARNESS)

F-27 HARNESS 
CONNECTOR

MB991865 (DUMMY 
RESISTOR: 3 

Ω)

F-27 SEAT BELT 
PRE-TENSIONER
CONNECTOR (DRIVER'S SIDE)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-65

STEP 5. Check the driver's side seat belt pretensioner 
circuit at the SRS-ECU connector E-07.
(1) Disconnect SRS-ECU connector E-07.

(2) Disconnect driver's seat belt pretensioner connector F-27.

CAUTION

Insert an insulator such as a cable tie to a depth of 4mm 
(0.16 inch) or more, otherwise the short spring will not be 
released.
(3) Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) 

thick] between terminals 29, 30 and the short spring to 
release the short spring.

CAUTION

Do not insert a test probe into the terminal from its front 
side directly as the connector contact pressure may be 
weakened.
(4) Check for continuity between E-07 harness connector 

terminals 29 and 30.
It should be open circuit.

Q: Does continuity exist?

YES : Go to Step 6.
NO :  Eras the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC 26 sets, replace 
the SRS-ECU (Refer to 

P.52B-215

).

ACX01478AJ

CONNECTOR: E-07

E-07 (Y)

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25 26 27 28 29 30 31 32 33

21 22

23 24

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204126

AD

CONNECTOR: F-27

F-27 (R)

CENTER 
PILLAR

1 2

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC200988 AL

A

A

E-07 HARNESS SIDE
CONNECTOR (FRONT VIEW)

TERMINAL

CABLE TIE

SHORT SPRING

4 mm (0.16 inch) OR MORE

SECTION
A - A

AC006244

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25 26 27 28 29 30 31 32 33

21 22

23 24

AR

E-07 HARNESS SIDE
CONNECTOR
(REAR VIEW)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-66

STEP 6. Check the harness for short circuit between 
SRS-ECU connector E-07 (terminal No.29 and 30) and 
driver’s seat belt pre-tensioner connector F-27 (terminal 
No.1 and 2).

NOTE: After inspecting intermediate connector E-19, inspect 
the wiring harness. If the intermediate connector E-19 is dam-
aged, repair or replace it (Refer to GROUP 00E, Harness Con-
nector Inspection 

P.00E-2

). Then go to Step 7.

Q: Are harness wires between SRS-ECU connector E-07 

(terminal No.29 and 30) and driver’s seat belt 
pre-tensioner connector F-27 (terminal No.1 and 2) in 
good condition?
YES : Go to Step 7.
NO :  Repair the harness wires between SRS-ECU 

connector E-07 and driver’s side seat belt 
pre-tensioner connector F-27. Then go to Step 7.

STEP 7. Recheck for diagnostic trouble code. 
Q: Is DTC 26 set?

YES : Return to Step 1. 
NO :  The procedure is complete. (If no malfunctions are not 

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.00-6

). 

ACX01478AJ

CONNECTOR: E-07

E-07 (Y)

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204126

AD

CONNECTOR: F-27

F-27 (R)

CENTER 
PILLAR

1 2

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204603AC

CONNECTOR: E-19

FLOOR 
CONSOLE

E-19

2

1

4

3

E-19