Mitsubishi Montero (2004+). Manual - part 1198

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-127

STEP 2. Check the passenger's air bag module circuit at 
the SRS-ECU connector E-08.
(1) Disconnect SRS-ECU connector E-08.

DANGER

Unclip passenger’s air bag module connector D-11. 
To prevents the air bag from deploying unintention-
ally, disconnect the passenger’s air bag module con-
nector D-11 to short the squib circuit.

(2) Disconnect the passenger's air bag module connector D-11.

CAUTION

Do not insert a test probe into the terminal from its front 
side directly as the connector contact pressure may be 
weakened.
(3) Check for continuity between E-08 harness connector 

terminals 9, 10 and body ground.
There should be open circuit.

Q: Does continuity exist? 

YES : Go to Step 3.
NO :  Erase the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC 65 sets, replace 
the SRS-ECU (Refer to 

P.52B-215

). Then go to Step 

4.

ACX01478AM

CONNECTOR: E-08

E-08 (Y)

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204125

CONNECTOR: D-11

AE

D-11 (R)

GLOVE BOX
STRIKER

1 2

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC006258

13 14 15 16 17 18 19 20

5 6 7 8 9 10 11 12

1 2

3 4

E-08 HARNESS SIDE CONNECTOR (REAR VIEW)

AQ

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-128

STEP 3. Check the harness wires for short circuit to 
ground between SRS-ECU connector E-08 (terminal No.9 
and 10) and passenger's air bag module connector D-11 
(terminal No.1 and 2).
Q: Are the harness wires between SRS-ECU connector 

E-08 (terminal No.9 and 10) and passenger's air bag 
module connector D-11 (terminal No.1 and 2) in good 
condition? 
YES : Go to Step 4.
NO :  Repair the harness wires between SRS-ECU 

connector E-08 and passenger's air bag module 
connector D-11. Then go to Step 4. 

STEP 4. Recheck for diagnostic trouble code. 
Q: Is DTC 65 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

). 

ACX01478AM

CONNECTOR: E-08

E-08 (Y)

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204125

CONNECTOR: D-11

AE

D-11 (R)

GLOVE BOX
STRIKER

1 2

HARNESS SIDE
CONNECTOR
(REAR VIEW)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-129

DTC 66: Driver's Seat Belt Pre-Tensioner (Squib) System Fault for Power Supply Circuit (Short-Circuit 
to Power Supply)

SEAT BELT
PRETENSIONER
(LH)

MICROCOMPUTER

AIR BAG DRIVE CIRCUIT

SRS-ECU

CONNECTOR
LOCK SWITCH

CONNECTOR
LOCK SWITCH

NOTE

: CONNECTOR
  COUPLED: ON
  CONNECTOR
  UNCOUPLED: OFF

Driver's Seat Belt Pre-Tensioner (Squib)

ACX01478AI

CONNECTOR: E-07

E-07 (Y)

AC204603AB

CONNECTOR: E-19

FLOOR 
CONSOLE

E-19

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-130

.

CIRCUIT OPERATION
The SRS-ECU judges how severe a collision is by 
detecting signals from the front impact sensors and 
the front air bag analog G-sensor. If the impact is 
over a predetermined level, the SRS-ECU outputs an 
ignition signal. At this time, if the front air bag safing 
G-sensor is on, the pre-tensioner will deploy. 

.

DTC SET CONDITIONS
This DTC is set if there is abnormal resistance 
between the input terminals of the driver's seat belt 
pre-tensioner (squib).

.

TROUBLESHOOTING HITS

• Damaged wiring harnesses or connectors

• Short to the power supply in the driver's seat belt 

pretensioner (squib) harness

• Malfunction of the SRS-ECU

.

DIAGNOSIS

Required Special Tools:

• 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)

• MB991865: Dummy resister

• MB991866: Resister harness

AC204126

AB

CONNECTOR: F-27

F-27 (R)

CENTER 
PILLAR