Mitsubishi 380. Manual — part 774
SRS AIR BAG DIAGNOSIS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-20
HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES
Required Special Tools:
• MB991958: diagnostic tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A (Vehicles with CAN
communication system)
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if diagnostic tool MB991958 does
not display.
1. Connect diagnostic tool MB991958 to the data link
connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
5. Choose "SRS-AIR BAG".
6. Select "Diagnostic Trouble Code."
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.
SRS WARNING LIGHT CHECK
M1524004300361
1. Check that the SRS warning light illuminates when the
ignition switch is in the "ON" position.
2. Check that it illuminates for approximately seven seconds
and then goes out.
3. If not, check for DTC.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
SRS AIR BAG DIAGNOSIS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-21
DIAGNOSTIC TROUBLE CODE CHART
M1524003300777
CAUTION
During diagnosis, a DTC code associated with
another system may be set when the ignition
switch is turned on with connector(s) discon-
nected. After completing the repair, confirm all
systems for DTC code(s). If DTC code(s) are set,
erase them all.
Inspect according to the inspection chart that is
appropriate for the DTC.
DIAGNOSTIC
TROUBLE CODE
NO.
INSPECTION ITEM
REFERENCE PAGE
B1400
*3
Driver's air bag short-circuited
B1401
*3
Driver's air bag open-circuited
B1402
*3
Driver's air bag drive circuit (ground side) short-circuited
B1403
*3
Driver's air bag drive circuit (power supply side)
short-circuited
B1404
*3
Driver's air bag activating circuit short-circuited
B1405
*5
Driver's air bag activating circuit open-circuited
B1406
*5
G-sensor of front impact sensor (RH) failure
B1407
*3
Front impact sensor (RH) voltage error
B1408
*3
Front impact sensor (RH) communication error
B1409
*3
Front impact sensor (RH) communication impossible
B1410
*3
Passenger's (front) air bag short-circuited
B1411
*3
Passenger's (front) air bag open-circuited
B1412
*3
Passenger's (front) air bag drive circuit (ground side)
short-circuited
B1413
*3
Passenger's (front) air bag drive circuit (power supply side)
short-circuited
B1414
*5
Passenger's (front) air bag activating circuit short-circuited
B1415
*5
Passenger's (front) air bag activating circuit open-circuited
B1416
*5
G-sensor of front impact sensor (LH) failure
B1417
*3
Front impact sensor (LH) voltage error
B1418
*3
Front impact sensor (LH) communication error
B1419
*3
Front impact sensor (LH) communication impossible
B1420
*3
Side-airbag squib (RH) short-circuited
B1421
*3
Side-airbag squib (RH) open-circuited
B1422
*3
Side-airbag squib (RH) drive circuit (ground side) shorted
B1423
*3
Side-airbag squib (RH) drive circuit (power supply side)
shorted
SRS AIR BAG DIAGNOSIS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-22
B1424
*5
Side-airbag squib (RH) drive circuit shorted
B1425
*5
Side-airbag squib (RH) drive circuit open
B1426
*5
G-sensor of side impact sensor (RH) failure
B1427
*3
Side impact sensor (RH) voltage error
B1428
*3
Side impact sensor (RH) communication error
B1429
*3
Side impact sensor (RH) communication impossible
B1430
*3
Side-airbag squib (LH) short-circuited
B1431
*3
Side-airbag squib (LH) open-circuited
B1432
*3
Side-airbag squib (LH) drive circuit (ground side) shorted
B1433
*3
Side-airbag squib (LH) drive circuit (power supply side)
shorted
B1434
*5
Side-airbag squib (LH) drive circuit shorted
B1435
*5
Side-airbag squib (LH) drive circuit open
B1436
*5
G-sensor of side impact sensor (LH) failure
B1437
*3
Side impact sensor (LH) voltage error
B1438
*3
Side impact sensor (LH) communication error
B1439
*3
Side impact sensor (LH) communication impossible
B1460
*3
Seat belt pre-tensioner
(RH) squib short-circuited
B1461
*3
Seat belt pre-tensioner
(RH) squib open-circuited
B1462
*3
Seat belt pre-tensioner
(RH) squib drive circuit (ground side) short-circuited
B1463
*3
Seat belt pre-tensioner
(RH) squib drive circuit (power supply side) short-circuited
B1464
*5
Seat belt pre-tensioner
(RH) (squib ignition drive circuit) system detected short
B1465
*5
Seat belt pre-tensioner
(RH) (squib ignition drive circuit) system detected open
B1466
*5
Analog G-sensor malfunction
B1467
*5
Safing G-sensor open-circuited (for frontal collision)
B1468
*5
Safing G-sensor short-circuited (for frontal collision)
B1469
*5
Safing G-sensor malfunction (for side collision)
B1470
*3
Seat belt pre-tensioner
(LH) squib short-circuited
B1471
*3
Seat belt pre-tensioner
(LH) squib open-circuited
DIAGNOSTIC
TROUBLE CODE
NO.
INSPECTION ITEM
REFERENCE PAGE
SRS AIR BAG DIAGNOSIS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-23
NOTE:
*1
: Electrically Erasable Programmable ROM
*2
: This DTC will remain in memory and the SRS warning light will be switched off when the system returns to
normal condition.
*3
: This DTC will remain in memory and the SRS warning light will be switched on even if the system returns
to normal condition.
*4
: This DTC will remain in memory when the front passenger's air bag is inactive condition in the event of an
impact.
*5
: This DTC cannot be erased by "Erase DTCs" function.
B1472
*3
Seat belt pre-tensioner
(LH) squib (ground side) short-circuited
B1473
*3
Seat belt pre-tensioner
(LH) squib (power supply side) short-circuited
B1474
*5
Seat belt pre-tensioner
(LH) (squib ignition drive circuit) system detected short
B1475
*5
Seat belt pre-tensioner
(LH) (squib ignition drive circuit) system detected open
B1476
*2
Power supply voltage (IG1 (A) voltage) drops abnormally.
B1477
*2
Power supply voltage (IG1 (B) voltage) drops abnormally.
B1478
*5
SRS-ECU capacitor circuit voltage too high
B1479
*5
SRS-ECU capacitor circuit voltage too low
B1496
*5
SRS-ECU non-volatile memory (EEPROM)
B1497
*5
SRS-ECU ASIC (for frontal activation)
B1498
*5
SRS-ECU ROM or RAM
B1499
*5
Collision decision
B1509
*2
Incorrect SRS-ECU
B1519
*3
SRS-ECU connector lock out of order
B1547
*4*5
Cut OFF for passenger’s front air bag
B1552
*5
Changing circuit shorted
B1553
*5
Changing circuit open
B1554
*5
SG BY-PASS circuit malfunction
B1555
*5
SG BY-PASS circuit (FET) open
B1557
*5
SRS-ECU ASIC
U1073
*2
Bus-off
DIAGNOSTIC
TROUBLE CODE
NO.
INSPECTION ITEM
REFERENCE PAGE
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