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Mitsubishi Galant 9G. Manual - part 1429
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-126
STEP 7. Check the side-airbag module (RH) circuit.
Measure the resistance at the SRS-ECU connector C-120.
(1) Disconnect SRS-ECU connector C-120.
DANGER
To prevent the air bag from deploying unintentionally,
disconnect the side-airbag module (RH) connector
D-32 to short the squib circuit.
(2) Disconnect side-airbag module connector D-32.
CAUTION
Insert an insulator such as a cable tie to a depth of 4mm
(0.16 inch) or more, otherwise the short spring will not be
released.
(3) Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch)
thick] between terminals 57, 58 and the short spring to
release the short spring.
(4) Measure at the wiring harness side.
CAUTION
Do not insert a test probe into the terminal from its front
side directly, as the connector contact pressure may be
weakened.
(5) Check for continuity between C-120 harness side connector
terminals 57 and 58.
It should be open circuit.
Q: Does continuity exist?
YES : Go to Step 8.
NO : Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC B1420 sets,
replace the SRS-ECU (Refer to
). Then go
to Step 7.
AC305362
CONNECTOR: C-120
C-120 (Y)
AG
SRS-ECU
63
55
51
69
61
66
58
65
64
56 57
68
60
67
59
70
62
53
52 B
A
54
C-120
Harness side
connector
(rear view)
AC307779
D-32 (R)
AD
2
1
HARNESS SIDE
CONNECTOR
(REAR VIEW)
CONNECTOR : D-32
AC301607AC
C-120 HARNESS SIDE
CONNECTOR (FRONT VIEW)
TERMINAL
CABLE
TIE
SECT-
ION
A - A
4 mm (0.16 inch) OR MORE
SHORT SPRING
A
A
AC301573
63
55
51
69
61
66
58
65
64
56 57
68
60
67
59
70
62
53
52 B
A
54
C-120 HARNESS SIDE
CONNECTOR
(REAR VIEW)
AD