Mitsubishi Galant (2004+). Manual — part 1573
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-185
NOTE: *: The squib circuit connectors integrate a
"short" spring (which prevents the seat belt
pre-tensioner from deploying unintentionally due to
static electricity by shorting the positive wire to the
ground wire in the squib circuit when the connectors
are disconnected) (Refer to
). Therefore, if
connector C-120 or D-33 is damaged or improperly
engaged, the short spring may not be released when
the connector is connected.
.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A
• MB991865: Dummy resistor
• MB991884: Resister harness (For Pre-tensioner)
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
scan tool
."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 2.
NO : Repair the CAN bus line (Refer to GROUP 54C,
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-186
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Go to Step 3.
NO : There is an intermittent malfunction such as poor
engaged connector(s) or open circuit (Refer to
GROUP 00, How to Cope with Intermittent
Malfunction
STEP 3. Using scan tool MB991958, read the diagnostic
trouble code.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOOK (OFF)" position.
Q: Is DTC B1519 set?
YES : Go to Step 4.
NO : Go to Step 5.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC206894
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-187
STEP 4. Check the SRS-ECU connector C-120.
Q: Is connector correctly engaged?
YES : Go to Step 5.
NO : Engage the connector correctly. Then go to Step 9.
STEP 5. Check SRS-ECU connector C-120 and passenger’s
seat belt pre-tensioner connector D-33. (Using scan tool
MB991958, read the diagnostic trouble code.)
(1) Disconnect the negative battery terminal.
(2) Disconnect connectors C-120 and D-33, and then
reconnect them. For connector D-33, 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.
(3) Connector the negative battery terminal.
(4) Erase the diagnostic trouble code memory, and check the
diagnostic trouble code.
Q: Is DTC B1460 set?
YES : Go to Step 6.
NO : The procedure is complete. It is assumed that DTC
B1460 set because connector C-120 or D-33 was
engaged improperly.
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)
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)
AC307915 AC
CONNECTOR: D-33
D-33 (B)
FORWARD
CENTER
PILLAR
HARNESS SIDE
CONNECTOR
(FRONT VIEW)
2 1
AC103556AU
LOCKING BUTTON
FLAT-TIP SCREW
DRIVER
D-33 HARNESS
SIDE CONNECTOR
D-33 PASSENGER'S
SEAT BELT
PRE-TENSIONER
CONNECTOR
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-188
STEP 6. Check the passenger's seat belt pre-tensioner.
(Using scan tool MB991958, read the diagnostic trouble
code.)
(1) Disconnect the negative battery terminal.
(2) Disconnect passenger's seat belt pre-tensioner connector
D-33. 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.
(3) Connect special tool MB991865 to special tool MB991884.
(4) Connect special tool MB991884 to the D-33 harness side
connector.
(5) Connect the negative battery terminal.
(6) Erase diagnostic trouble code memory, and then check the
diagnostic trouble code.
Q: Is DTC B1460 set?
YES : Go to Step 7.
NO : Replace the passenger's seat belt pre-tensioner
(Refer to
AC307915 AC
CONNECTOR: D-33
D-33 (B)
FORWARD
CENTER
PILLAR
HARNESS SIDE
CONNECTOR
(FRONT VIEW)
2 1
AC103556AU
LOCKING BUTTON
FLAT-TIP SCREW
DRIVER
D-33 HARNESS
SIDE CONNECTOR
D-33 PASSENGER'S
SEAT BELT
PRE-TENSIONER
CONNECTOR
MB991884
MB991885
AC103283AP
MB991865
(DUMMY RESISTOR : 3
Ω)
MB991884
(RESISTOR
HARNESS)
D-33 HARNESS SIDE
CONNECTOR
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст