Mitsubishi Pajero Pinin. Manual — part 306
SRS –
General Information
52B-3
Driver’s air bag
module
Clock spring
Front passenger’s
air bag module
Diagnosis
connector
SRS-ECU
Seat belt pre-tensioner
Seat belts with
pre-tensioner
Driver’s air bag
Side air bag
Side impact sensor*
Front
passenger’s
air bag
Side air bag
module*
SRS warning lamp
SRS-ECU
Front impact sensor
NOTE
*: Indicates the parts equipped on the right and left sides.
SRS –
SRS Service Precautions
52B-4
SRS SERVICE PRECAUTIONS
1.
In order to avoid injury to yourself or others
from accidental deployment of the air bag during
servicing, read and carefully follow all the
precautions and procedures described in this
manual.
2.
Do not use any electrical test equipment on
or near SRS components, except those
specified on P.52B-7.
3.
Never Attempt to Repair the Following
Components:
D
SRS air bag control unit (SRS-ECU)
D
Front impact sensor
D
Clock spring
D
Driver’s and front passenger’s air bag
modules
D
Side air bag module
D
Side impact sensor
D
Seat belt with pre-tensioner
NOTE
If any of these components are diagnosed as
faulty, they should only be replaced, in
accordance with the INDIVIDUAL COM-
PONENTS SERVICE procedures in this
manual. (Refer to P.52B-30.)
4.
After disconnecting the negative (–) battery cable, wait
60 seconds at least before any service and insulate
the disconnected cable with tape. The SRS retain
enough voltage to deploy the air bag for a short time
even after disconnection of the battery. So, serious
injury may result by accidental air bag deployment
if a work is done on the SRS just after the disconnection
of the battery.
5.
Do not attempt to repair the wiring harness connectors
of the SRS. If the connector(s) are diagnosed as defective,
replace the wiring harness(es). If the harness(es) are
diagnosed as faulty, replace or repair the wiring
harness(es) according to the following table.
Insulating tape
Battery
SRS-ECU connector
SRS –
SRS Service Precautions
52B-5
SRS-ECU
Terminal No.
Destination of harness
Corrective action
1, 2, 3, 4
Instrument panel wiring harness
→
Front wiring harness
→
Front
impact sensor
Repair or replace each wiring
harness.
7
Instrument panel wiring harness
→
Earth
8
Instrument panel wiring harness
→
Combination meter
(SRS warning lamp)
9, 10
Instrument panel wiring harness
→
Front passenger’s air bag
module
11, 12
Instrument panel wiring harness
→
Clock spring
→
Driver’s air bag
module
Repair or replace the dash wiring
harness. Replace clock spring.
13
Instrument panel wiring harness
→
Junction block (fuse No.8)
Repair or replace each wiring
harness
16
Instrument panel wiring harness
→
Junction block (fuse No.6)
harness.
20
Instrument panel wiring harness
→
Diagnosis connector
21, 22
Body wiring harness
→
Side air bag module (L.H.)
23, 24
Body wiring harness
→
Side air bag module (R.H.)
27, 28
Body wiring harness
→
Seat belt with pre-tensioner (R.H.)
29, 30
Body wiring harness
→
Seat belt with pre-tensioner (L.H.)
34, 35, 36
Body wiring harness
→
Side impact sensor (L.H.)
40, 41, 42
Body wiring harness
→
Side impact sensor (R.H.)
6.
Inspection of the SRS-ECU harness connector should be carried out by the following procedure.
Insert the special tool (probe, MB991222, in the harness set) into connector from harness side (rear
side), and connect the tester to this probe. If any tool than special is used, damage to the harness
and other components will result. Furthermore, measurement should not be carried out by touching
the probe directly against the terminals from the front of the connector. The terminals are plated to
increase their conductivity, so that if they are touched directly by the probe, the plating may break,
which will cause drops in reliability.
MB991222
SRS-ECU harness connector
SRS-ECU harness connector (rear view)
SRS –
SRS Service Precautions/Special Tools
52B-6
7.
SRS components and seat belt with pre-tensioner should not be subjected to heat, so remove the
front impact sensor, SRS-ECU, air bag module (driver’s side and front passenger’s side), clock spring,
side impact sensors, front seat assemblies (side air bag module), and seat belts with pre-tensioner
before drying or baking the vehicle after painting.
D
Front impact sensor, SRS-ECU, air bag module, clock spring, side impact sensor: 93
_
C or more
D
Seat belt with pre-tensioner: 90
_
C or more
8.
Whenever you finish servicing the SRS, check warning lamp operation to make sure that the system
functions properly. (Refer to P.52B-8.)
9.
Make certain that the ignition switch is OFF when the MUT-
II
is connected or disconnected.
10. If you have any questions about the SRS, please contact your local distributor.
NOTE
SERIOUS INJURY CAN RESULT FROM UNINTENDED AIR BAG DEPLOYMENT, SO USE ONLY
THE PROCEDURES AND EQUIPMENT SPECIFIED IN THIS MANUAL.
SPECIAL TOOLS
Tool
Number
Name
Use
MB991502
MUT
-II
sub
assembly
D
Reading diagnosis codes
D
Erasing diagnosis code
D
Reading trouble period
D
Reading erase times
MB991613
SRS check
harness
Checking the SRS electrical circuitry
A
B
C
D
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Check harness
B: LED harness
C: LED harness
adapter
D: Probe
Checking the continuity and measuring the
voltage at
the SRS
-
ECU harness connector
MB990803
Steering wheel
puller
Steering wheel removal
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