Mitsubishi Galant (2004+). Manual — part 1605
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-313
STEP 3. Check the driver’s seat belt switch.
AC305264
AS
CONNECTOR: D-28
D-28 (B)
HARNESS SIDE
AC308221AB
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
BUCKLE
TONGUE
AC308214AB
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
AC308219AB
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-314
Disconnect driver’s seat belt switch connector D-28. Then
check continuity between the switch terminals.
Q: Is driver’s seat belt switch in good condition?
YES : Go to Step 4.
NO : Replace inner seat belt. (Refer to GROUP 52A, Front
Seat Belt
.)
ITEM
TESTER
CONNECTION
STANDARD
VALUE
SPECIFIED
CONDITION
Fastened seat
belt
3
− 5
820
± 20 Ω
−
3
− Ground
−
No continuity
5
− Ground
−
No continuity
Unfastened
seat belt
4
− 5
820
± 20 Ω
−
4
− Ground
−
No continuity
5
− Ground
−
No continuity
AC308215
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
AB
AC308218 AB
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-315
STEP 4. Check the driver’s seat belt switch circuit D-28.
Measure the resistance at SRS-ECU connector C-122.
(1) Disconnect driver’s seat belt switch connector D-28.
(2) Install the driver’s seat belt to the driver’s seat belt switch.
(3) Disconnect SRS-ECU connector C-122 and measure at the
harness side (rear side).
(4) Measure the resistance between terminal 3 and 4.
Resistance should be 820
± 82 Ω
AC305264
AS
CONNECTOR: D-28
D-28 (B)
HARNESS SIDE
AC308221AD
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
BUCKLE
TONGUE
AC305362
CONNECTOR: C-122
C-122 (Y)
AI
SRS-ECU
C-122
Harness side
connector
(rear view)
A
B
18
10
15
7
13
5
14
6
16
8
17
9
19
11
20
12
1 2
3 4
AC308212
A
B
18
10
15
7
13
5
14
6
16
8
17
9
19
11
20
12
1 2
3 4
C-122 HARNESS SIDE
CONNECTOR
(REAR VIEW)
AB
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-316
(5) Remove the driver’s seat belt from the driver’s seat belt
switch.
(6) Disconnect SRS-ECU connector C-122 and measure at the
harness side (rear side).
(7) Measure the resistance between terminal 18 and 4.
Resistance should be 820
± 82 Ω
Q: Does the resistance meet the value above?
YES : Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC B1530, B1531,
B1532, B1533, B1534, B1535, B1536, B1537, B1538
or B1539 are set, replace the SRS-ECU. (Refer to
NO : Go to Step 5.
AC308221AC
D-28 DRIVER'S
SEAT BELT SWITCH
CONNECTOR
BUCKLE
TONGUE
AC305362
CONNECTOR: C-122
C-122 (Y)
AI
SRS-ECU
C-122
Harness side
connector
(rear view)
A
B
18
10
15
7
13
5
14
6
16
8
17
9
19
11
20
12
1 2
3 4
AC308213
A
B
18
10
15
7
13
5
14
6
16
8
17
9
19
11
20
12
1 2
3 4
C-122 HARNESS SIDE
CONNECTOR
(REAR VIEW)
AB
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