Mitsubishi 380. Manual - part 814
SRS AIR BAG DIAGNOSIS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-180
STEP 7. Check the passenger’s seat belt pre-tensioner
circuit. Measure the resistance at the SRS-ECU connector
D-27.
(1) Disconnect SRS-ECU connector D-27.
DANGER
To prevent the seat belt pre-tensioner from deploying
unintentionally, disconnect the passenger’s seat belt
pre-tensioner connector D-21 to short the squib cir-
cuit.
(2) Disconnect passenger's seat belt pre-tensioner connector
D-21. Use a flat-tipped screwdriver to unlock the locking
button at the harness side connector by withdrawing it
toward you in two stages, and then disconnect the
connector.
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 7, 8 and the short spring to release
the short spring.
CAUTION
Do not insert a test probe into the terminal from its front
side directly, as the connector contact pressure may be
weakened.
(4) Check for continuity between D-27 harness side connector
terminals 7 and 8.
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 B1470 sets,
replace the SRS-ECU (Refer to
). Then go
to Step 9.
24DB064A
CONNECTOR: D-27
SRS-ECU
D-27 (Y)
A
B
18
10
15
7
13
5
14
6
16
8
17
9
19
11
20
12
1 2
3 4
D-27 Floor
harness
connector
(rear view)
AC306920AC
CONNECTOR: D-21
D-21 (B)
FOWARD
CENTER
PILLAR
HARNESS SIDE
CONNECTOR
(FRONT VIEW)
2 1
24DB084A
A
A
D-27 FLOOR HARNESS SIDE
CONNECTOR (FRONT VIEW)
TERMINAL
CABLE TIE
SHORT SPRING
4 mm (0.16 inch) OR MORE
SEC-
TION
A - A
24DB085A
A
B
18
10
15
7
13
5
14
6
16
8
17
9
19
11
20
12
1 2
3 4
D-27 FLOOR HARNESS
CONNECTOR SIDE
(REAR VIEW)