Mitsubishi Montero (2002-2004). Manual - part 810

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-109

STEP 2. Check the passenger's seat belt pre-tensioner
circuit at the SRS-ECU connector E-07.
(1) Disconnect SRS-ECU connector E-07.

(2) Disconnect passenger's seat belt pre-tensioner connector

F-29.

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-07 harness connector

terminals 27, 28 and body ground.
It should be open circuit.

Q: Does continuity exist?

NO : Erase the diagnostic trouble code memory, and check

the diagnostic trouble code. If DTC 69 sets, replace
the SRS-ECU. (Refer to

P.52Ba-31

.) Then go to Step

YES : Go to Step 3.

STEP 3. Check harness wires for short circuit to ground
between SRS-ECU connector E-07 (terminal No.27 and 28)
and passenger's seat belt pre-tensioner connector F-29
(terminal No.1 and 2).
NOTE: After inspecting intermediate connector E-16 inspect
the wiring harness. If the intermediate connector E-16 is dam-
aged, repair or replace it. (Refer to GROUP 00E, Harness Con-
nector Inspection

P.00E-2

.) Then go to Step 4.

ACX01478AI

CONNECTOR: E-07

E-07 (Y)

AC204127

CONNECTOR: F-29

F-29 (R)

CENTER
PILLAR

AC201663

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

2122

23 24

E-07 HARNESS CONNECTOR:
HARNESS SIDE

AC204603AE

CONNECTOR: E-16

FLOOR
CONSOLE

E-16

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-110

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

07 (terminals No.27 and 28) and passenger's seat belt
pre-tensioner connector F-29 (terminals No.1 and 2) in
good condition?
YES : Go to Step 4.
NO : Repair the harness wires between SRS-ECU

connector E-07 and passenger's seat belt pre-
tensioner connector F-29. Then go to Step 4.

STEP 4. Recheck for diagnostic trouble code.
Q: Is DTC 69 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)

AC204127

CONNECTOR: F-29

F-29 (R)

CENTER
PILLAR

1 2

HARNESS
CONNECTOR:
HARNESS SIDE

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-111

DTC 71: Right Hand Side-Airbag Module (Squib) System Fault 1 (Short Circuit between Terminals of
the Squib Circuit)

CIRCUIT OPERATION

• The SRS-ECU judges how severe a collision is

by detecting signals from the left and right side
impact sensors. If the impact is over a predeter-
mined level, the SRS-ECU outputs an ignition
signal. At this time, if the side-airbag safing G-
sensor is on, the SRS side-airbag will inflate.

• The ignition signal is input to the side-airbag

module to inflate the air bag.

DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the side-airbag mod-
ule (RH) (squib).

TROUBLESHOOTING HINTS

• Improper engaged connector or defective short

bar*

• Short between the side air bag module (RH)

(squib) circuit terminals

• Damaged connector(s)

• Malfunction of the SRS-ECU

AC204436

NOTE

: CONNECTOR LOCK SWITCH

CONNECTOR

CONNECTED: ON
CONNECTOR

DISCONNECTED: OFF

Side-Airbag Module (RH) (Squib) Circuit

ACX01478AI

CONNECTOR: E-07

E-07 (Y)

ACX01649

X0942CA

CONNECTOR: F-21

F-21 (R)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-112

NOTE: *: The squib circuit connectors integrate a
"short" bar (which prevents the air bag from deploy-
ing unintentionally due to static electricity by shorting
the positive wire to the ground wire in the squib cir-
cuit when the connectors are disconnected). (Refer
to

P.52Ba-2

.) Therefore, if connector E-07 and F-21

is damaged or improperly engaged, the short bar
may not be released when the connector is con-
nected.

DIAGNOSIS

Required Special Tools:

• MB991502: Scan Tool (MUT-II)

• MB991865: Dummy resister

• MB991866: Resister harness

STEP 1. Check the diagnostic trouble code.
Q: Is DTC 34 set?

YES : Go to Step 2.
NO : Go to Step 3.

STEP 2. Check SRS-ECU connector E-07.
Q: Is the connector correctly engaged?

YES : Go to Step 3.
NO : Engage the connector correctly. Then go to Step 7.

ACX01478AI

CONNECTOR: E-07

E-07 (Y)

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