Mitsubishi Montero (2002-2004). Manual — part 772
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SPECIAL TOOLS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52Ba-21
SPECIAL TOOLS
M1524000700301
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
MB990784
Ornament remover
General service tool
Removal of cover.
MB991502
Scan tool (MUT-II)
MB991496-OD
• Reading diagnostic trouble
codes
• Erasing diagnostic trouble
codes
• Reading vehicle data for a
specific period
• Reading erase times (Refer to
MUT-II operating instructions)
MB991865
Dummy resistor
SRS air bag circuit check
MB991866
Resistor harness
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Test harness
B: LED harness
C: LED harness adapter
D: Probe
General service tools
Checking the continuity and
measuring the voltage at the
SRS-ECU harness connector
MB686560
SRS air bag adapter
harness
General service tool
• Deployment of air bag module
(Front passenger's side) inside
the vehicle
• Deployment of air bag module
(Front passenger's side), seat
belt with pre-tensioner outside
the vehicle
MB990784
B991502
MB991865
MB991866
MB991223
A
D
C
B
AG
MB686560
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TEST EQUIPMENT
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52Ba-22
TEST EQUIPMENT
M1524000800159
SRS MAINTENANCE
M1524003900229
The SRS must be inspected by an authorized dealer up to 10
years after the date of vehicle registration. (Refer to GROUP
00, Maintenance Service
− SRS Maintenance
POST-COLLISION DIAGNOSIS
M1524001100272
To inspect and service the SRS after a collision (whether or not
the air bags have deployed), perform the following steps.
SRS-ECU MEMORY CHECK
Required Special Tool:
• MB991502: Scan tool (MUT-II)
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector (16-
pin).
2. Read (and write down) all displayed diagnostic trouble
codes. (Refer to
NOTE: If the battery power supply has been disconnected or
disrupted by the collision, scan tool MB991502 cannot com-
municate with the SRS-ECU. Check the battery then check
and, if necessary, repair the front wiring harness and the
instrument panel wiring harness before proceeding.
3. Read the data list (fault duration and how many times
memories are erased) using scan tool MB991502.
TOOL
NAME
USE
Digital multi-meter
Use a multi-meter for which the maximum
test current is 2 mA or less at the minimum
range of resistance measurement
Checking the SRS electrical circuitry with
SRS check harness
AC000019AB
ACX01543
MB991502
AB
16-PIN
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POST-COLLISION DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52Ba-23
Data list
4. Erase the diagnostic trouble codes and, after waiting five
seconds or more, read (and write down) all displayed
diagnostic trouble codes. (Refer to
REPAIR PROCEDURE
.
WHEN FRONT AIR BAGS DEPLOY IN A COLLISION.
1. Replace the following parts with new ones.
• Front impact sensor (Refer to
.)
• SRS-ECU (Refer to
• Air bag modules (Refer to
• Seat belt with pre-tensioner (Refer to
2. Check the following parts and replace if there are any
malfunctions.
• Clock spring (Refer to
• Steering wheel, steering column and shaft assembly
(1) Check the wiring harness (built into the steering wheel)
and connectors for damage, and terminals for
deformation.
(2) Install the air bag module to check fit or alignment with
the steering wheel.
(3) Check the steering wheel for noise, binds or difficult
operation and excessive free play.
3. Check the wiring harnesses for binding, the connectors for
damage, poor connections, and the terminals for
deformation. (Refer to
.
WHEN SIDE AIR BAGS DEPLOY IN A COLLISION.
1. Replace the following parts with new ones.
• SRS-ECU (Refer to
• Side impact sensors (Refer to
.)
• Front seatback assembly (Refer to GROUP 52A, Front Seat
.)
2. Check the wiring harnesses for binding, the connectors for
damage, poor connections, and the terminals for
deformation. (Refer to
.
NO.
SERVICE DATA ITEM
APPLICABILITY
92
Number indicating how often the memory is
cleared
Maximum time to be stored: 250
93
How long a problem has lasted (How long it
takes from the occurrence of the problem till
the first air bag squib igniting signal)
Maximum time to be stored: 9,999 minutes
(approximately seven days)
94
How long a problem has lasted (How long it
takes from the first air bag squib igniting
signal till now.)
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POST-COLLISION DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52Ba-24
WHEN AIR BAGS DO NOT DEPLOY IN LOW-SPEED
COLLISION.
Check the SRS components. If the SRS components are show-
ing any visible damage such as dents, cracks, or deformation,
replace them with new ones. Concerning parts removed for
inspection, replacement with new parts and cautionary points
for working, refer to appropriate INDIVIDUAL COMPONENT
SERVICE,
.
Front impact sensors
1. Check the headlight support panel for distortion and rust.
2. Check the front impact sensor for dents, cracks, deformation
or rust.
3. Check the front impact sensor wiring harnesses for binding,
check the connector for damage, and check the terminals
for deformation.
.
SRS-ECU
1. Check the SRS-ECU case and brackets for dents, cracks or
deformation.
2. Check the connector for damage, and the terminals for
deformation.
3. Check the fit of the SRS-ECU and its bracket.
.
ACX00588
FENDER SHIELD
PANEL
FRONT IMPACT SENSOR
AB
ACX00587AB
SRS-ECU
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