DUAL-STAGE AIR BAG SYSTE
M
DTC
Possible Cause
B1400
Driver-side air bag first-stage short circuit
B1401
Driver-side air bag module first-stage open circuit
B1402
Driver-side air bag module first-stage short to voltage
B1403
Driver-side air bag module first-stage short to ground
B1404
Driver-air bag module first-stage activation circuit short
B1405
Driver-side air bag module first-stage activation circuit open
B1406
Front impact G sensor (RH) failure
B1407
Front impact sensor (RH) voltage error
B1408
Front impact sensor (RH) communication error
B1409
Front impact sensor (RH) communication impossible
B1410
Passenger-side air bag module first-stage short circuit
B1411
Passenger-air bag module first-stage open circuit
B1412
Passenger-air bag module first-stage short to voltage
B1413
Passenger-air bag module first-stage short to ground
B1414
Passenger-air bag module first-stage activation circuit short
B1415
Passenger-side air bag module first-stage activation circuit short
B1416
Front impact G sensor (LH) failure
B1417
Front impact sensor (LH) voltage error
B1418
Front impact sensor (LH) communication error
B1419
Front impact sensor (LH) communication impossible
B1420
Side impact air bag module (RH) short circuit
B1421
Side impact air bag module (RH) open circuit
B1422
Side impact air bag module (RH) short to voltage
B1423
Side impact air bag module (RH) power short to ground
B1424
Side impact air bag module (RH) drive circuit shorted
B1425
Side impact air bag module (RH) drive circuit open
B1426
Side impact sensor (RH) failure
B1427
Side impact sensor (RH) voltage error
B1428
Side impact sensor (RH) power supply circuit
B142
9
Side im
pact sensor
(RH
) communication im
possibl
e
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B1430
Side impact air bag module (LH) short circuit
B1431
Side impact air bag module (LH) open circuit
B1432
Side impact air bag module (LH) circuit short to voltage
B1433
Side impact air bag module (LH) circuit short to ground
B1434
Side impact air bag module (LH) drive circuit shorted
B1435
Side impact air bag module (LH) drive circuit open
B1436
Side impact sensor (LH) failure
B1437
Front impact sensor (LH) voltage error
B1438
Front impact sensor (LH) communication error
B1439
Front impact sensor (LH) communication impossible
B1460
Seat belt pretensioner (RH) short circuit
B1461
Seat belt pretensioner (RH) open circuit
B1462
Seat belt pretensioner (RH) circuit short to voltage
B1463
Seat belt pretensioner (RH) circuit short to ground
B1464
Seat belt pretensioner (RH) ignition drive circuit short detected
B1465
Seat belt pretensioner (RH) ignition drive circuit short detected
B1466
Analog G Sensor malfunction
B1467
Safing G sensor open circuit (frontal impact)
B1468
Safing G sensor short circuit (frontal impact)
B1469
Safing G sensor malfunction (side impact)
B1470
Seat belt pretensioner (LH) short circuit
B1471
Seat belt pretensioner (LH) open circuit
B1472
Seat belt pretensioner (LH) short to voltage
B1473
Seat belt pretensioner (LH) short to ground
B1474
Seat belt pretensioner (LH) ignition drive circuit short detected
B1475
Seat belt pretensioner (LH) ignition drive circuit open detected
B1476
Power supply voltage drops abnormally
B1477
Power supply voltage drops abnormally
B1478
SRS ECU capacitor circuit voltage high
B1479
SRS ECU capacitor circuit voltage low
B1480
Driver-side air bag module second-stage short circuit
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B1523
Seat belt switch (RH) power-side circuit shorted for N/C
terminal
B1524
Seat belt switch (RH) circuit open for N/O terminal
B1525
Seat belt switch (RH) ground-side circuit shorted for N/O
terminal
B1526
Seat belt switch (RH) power-side circuit shorted for N/O
terminal
B1527
Seat belt switch (RH) circuit open for COM terminal
B1528
Seat belt switch (RH) ground-side circuit shorted for COM
terminal
B1529
Seat belt switch (RH) power-side circuit shorted for COM
terminal
B1530
Seat belt switch (LH) malfunction
B1531
Seat belt switch (LH) ground-side circuit shorted for N/C
terminal
B1532
Seat belt switch (LH) ground-side circuit shorted
B1533
Seat belt switch (LH) power-side circuit shorted for N/C
terminal
B1534
Seat belt switch (LH) circuit open for N/O terminal
B1535
Seat belt switch (LH) ground-side circuit shorted for N/O
terminal
B1536
Seat belt switch (LH) power-side circuit shorted for N/O
terminal
B1537
Seat belt switch (RH) circuit open for COM terminal
B1538
Seat belt switch (LH) ground circuit shorted
B1539
Seat belt switch (LH) power circuit shorted
B1540
Occupant classification ECU malfunction
B1541
Occupant classification ECU calibration malfunction
B1542
Occupant classification sensor (S1) malfunction
B1543
Occupant classification sensor (S2) malfunction
B1545
Occupant classification ECU communication error
B1546
Occupant classification ECU communication impossible
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REMOVAL & INSTALLATION. Connect negative battery cable. Turn
ignition on. Measure voltage between ground and terminal No. 1 (White/Blue
wire) of connector A-27. See Fig. 34
. If voltage is less than 9 volts, go to next
step. If voltage is 9 volts or more, replace front impact sensor. Go to step 5 .
4. Inspect Black/Red wire between SRS ECU connector C-26, terminal No. 47
and front impact sensor connector A-27, terminal No. 2 for an open or short
circuit, including connector C-15. See Fig. 33
. Inspect White/Red wire
between SRS ECU connector C-26, terminal No. 48 and front impact sensor
connector A-27, terminal No. 1 for an open or short circuit, including
connector C-15. If an open or short circuit is found in either wire, replace wire
harness between SRS ECU and front impact sensor. Go to next step. If wires
are okay, reconnect SRS components. Erase, then retrieve DTCs. If DTC
B1407 is retrieved, replace SRS ECU. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. Go to next step.
5. Reconnect SRS components. Erase, then retrieve DTCs. If DTC B1407 is
retrieved, go to step 1 . If DTC B1407 is not retrieved, system is normal at this
time.
Fig. 34: Identifying Connector A
-21 & A
-24 Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC B1408: FRONT IMPACT SENSOR (RH) COMMUNICATION ERROR 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
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ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. If DTC B1416 is not retrieved, system is normal at this
time.
DTC B1417: FRONT IMPACT SENSOR (LH) VOLTAGE ERROR 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
diagnose CAN bus lines and CAN bus lines are satisfactory, go to next step. If
scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. If DTC B1417 is retrieved, go to next step. If DTC
B1417 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery terminal. Disconnect driver-side front impact
sensor connector A-21. See FRONT IMPACT SENSOR
under REMOVAL
& INSTALLATION. See Fig. 30
. Connect negative battery cable. Turn
ignition on. Measure voltage between ground and terminal No. 2 (Black/Blue
wire) of driver-side front impact sensor. See Fig. 34
. If voltage is 9 volts or
more, replace front impact sensor. Go to step 1 . If voltage is less than 9 volts,
go to next step.
4. Disconnect SRS ECU connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. Inspect
White/Blue wire between SRS ECU connector C-26, terminal No. 38 and front
impact sensor connector A-21, terminal No. 1 for an open or short circuit,
including connector C-31. Inspect Black/Blue wire between SRS ECU
connector C-26, terminal No. 39 and front impact sensor connector A-21,
terminal No. 2 for an open or short circuit, including connector C-31. If an
open or short circuit is found in either wire, replace wire harness between SRS
ECU and front impact sensor. Go to next step. If wires are okay, reconnect
SRS components. Erase, then retrieve DTCs. If DTC B1417 is retrieved,
replace SRS ECU. Go to next step.
5. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1417 is retrieved, go to step 1 . If DTC B1417 is not
retrieved, system is normal at this time.
DTC B1418: FRONT IMPACT SENSOR (LH) COMMUNICATION ERROR
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next step. If DTC B1437 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect passenger side impact sensor
connector D-23. See FRONT IMPACT SENSOR
under REMOVAL &
INSTALLATION. See Fig. 30
. Connect negative battery cable. Turn ignition
on. Measure voltage between ground and side impact sensor connector D-23,
terminal No. 2 (Black/Blue wire). See Fig. 37
. If voltage is 9 volts or more,
replace side impact sensor. Go to step 6 . If voltage is less than 9 volts, go to
next step.
4. Disconnect negative battery cable. Disconnect SRS ECU connector C-40. See
SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. Release SRS ECU connector shorting bar using a cable tie.
Inspect White/Blue wire between SRS ECU connector C-40, terminal No. 19
and side impact sensor connector D-23, terminal No. 1 for a short or open
circuit. See Fig. 33
. Inspect Black/Blue wire between SRS ECU connector C-
40, terminal No. 20 and side impact sensor connector D-21, terminal No. 2 for
a short or open circuit. If wires are not okay, go to next step. If wires are okay,
reconnect SRS components. Erase, then retrieve DTCs. If DTC 1437 is
retrieved, replace SRS ECU. Go to step 6 .
5. Replace wire harness between SRS ECU and driver side impact sensor. Go to
next step.
6. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1437 is retrieved, go to step 1 . If DTC B1437 is not
retrieved, system is normal at this time.
DTCB1438: FRONT IMPACT SENSOR (LH) COMMUNICATION ERROR 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
diagnose CAN bus lines and CAN bus lines are satisfactory, go to next step. If
scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. If DTC B1438 is retrieved, go to next step. If DTC
B1438 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery terminal. Replace driver-side impact sensor with
passen
ger-side im
pact sensor. See SIDE IMPACT SENSOR
under
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DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
diagnose CAN bus lines and CAN bus lines are satisfactory, go to next step. If
scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. If DTC B1541 is retrieved, replace front seat slide
adjuster. If DTC B1541 is not retrieved, an intermittent condition may exist.
DTC B1542: OCCUPANT CLASSIFICATION SENSOR S1 MALFUNCTION 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
diagnose CAN bus lines and CAN bus lines are satisfactory, go to next step. If
scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. If DTC B1542 is retrieved, replace front seat slide
adjuster. If DTC B1542 is not retrieved, an intermittent condition may exist.
DTC B1543: OCCUPANT CLASSIFICATION SENSOR S2 MALFUNCTION 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
diagnose CAN bus lines and CAN bus lines are satisfactory, go to next step. If
scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. If DTC B1543 is retrieved, replace front seat slide
adjuster. If DTC B1543 is not retrieved, an intermittent condition may exist.
DTC B1545: OCCUPANT CLASSIFICATION ECU COMMUNICATION ERROR 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
diagnose CAN bus lines and CAN bus lines are satisfactory, go to next step. If
scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. Turn ignition off. If DTC B1545 is retrieved, go to
next step. If DTC B1545 is not retrieved, an intermittent condition may exist.
3.
Disconnect occupant classification ECU connector D
-38, located under
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3.
STEP 3. Using scan tool MB991958, check for any diagnostic trouble code.Check if a DTC, which relates to CAN communication-linked systems below,
is set.
Combination meter
DTC indicating a time-out error related to the engine or automatic
transaxle control system ETACS-ECU
DTC indicating a time-out error related to the engine or automatic
transaxle control system
1. Turn the ignition switch to the "ON" position.
2. Check for a DTC related to the relevant system.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?
YES:
Go to Step 5 .
NO:
Go to Ste
p 4.
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