2004 MITSUBISHI ENDEAVOR ECU

MODULE & CLOCKSPRIN
G under REMOVAL & INSTALLATION.
Disconnect driver-side air bag module connector C-305. See Fig. 30
. Connect
Load Resistor (MB991865) to upper clockspring connector using Load
Resistor Adapter (MB991866). Insert load resistor adapter leads into terminals
No. 3 (Yellow/Green wire) and No. 4 (Yellow/Black wire) of connector C-305.
See Fig. 31
. Connect negative battery cable. Erase, then retrieve DTCs. If
DTC B1481 is retrieved, go to next step. If DTC B1481 is not retrieved,
replace driver-side air bag module. Go to step 6 .
4. Disconnect negative battery cable. Disconnect lower clockspring connector C-
307. Connect load resistor and load resistor adapter to terminals No. 11
(Yellow/Blue wire) and No. 12 (Yellow/Violet wire) on harness-side of
connector C-307. See Fig. 32
. Reconnect negative battery cable. Erase, then
retrieve DTCs. If DTC B1481 is retrieved, replace clockspring. Go to step 6 . I
f
DTC B1481 is not retrieved, go to next step.
5. Disconnect negative battery cable. Disconnect clockspring connector C-307.
Disconnect SRS ECU connector C-26. Release SRS ECU shorting bar using a
cable tie. Measure resistance of Yellow/Blue wire between SRS ECU
connector terminals No. 33 and terminal No. 11 of lower clockspring connector
C307. See Fig. 33
. Measure resistance of Yellow/Violet wire between SRS
ECU connector terminal No. 34 and terminal No. 12 of lower clockspring
connector C307. If resistance is less than 2 ohms in both wires, reconnect
components. Erase, then retrieve DTCs. If DTC B1481 is retrieved, replace
SRS ECU. Go to next step. If resistance is 2 ohms or more in either wire,
replace wire harness between SRS ECU and clockspring. Go to next step.
6. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1481 is retrieved, go to step 1 . If DTC B1401 is not
retrieved, system is normal at this time.
DTC B1482: DRIVER-SIDE AIR BAG MODULE SECOND-STAGE CIRCUIT SHORT TO VOLTAGE1. 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
ste
p.

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

2. Erase, then retrieve DTCs. Turn ignition off. If DTC B1482 is retrieved, go to
next step. If DTC B1482 is not retrieved, an intermittent condition may exist.
3. Remove driver-side air bag module. See DRIVER
-SIDE AIR BAG
MODULE & CLOCKSPRING
under REMOVAL & INSTALLATION.
Disconnect driver-side air bag module connector C-305. See Fig. 30
. Connect
Load Resistor (MB991865) to upper clockspring connector using Load
Resistor Adapter (MB991866). Insert load resistor adapter leads into terminals
No. 3 (Yellow/Green wire) and No. 4 (Yellow/Black wire) of connector C-305.
See Fig. 31
. Connect negative battery cable. Erase, then retrieve DTCs. If
DTC B1482 is retrieved, go to next step. If DTC B1482 is not retrieved,
replace driver-side air bag module. Go to step 7 .
4. Disconnect negative battery cable. Disconnect lower clockspring connector C-
307. Connect load resistor and load resistor adapter to terminals No. 11
(Yellow/Blue wire) and No. 12 (Yellow/Violet wire) on harness-side of
connector C-307. See Fig. 32
. Reconnect negative battery cable. Erase, then
retrieve DTCs. If DTC B1482 is retrieved, replace clockspring. Go to step 7 . I
f
DTC B1482 is not retrieved, go to next step.
5. Disconnect negative battery cable. Disconnect clockspring connector C-307.
Disconnect SRS ECU connector. Release SRS ECU connector shorting bar
using a cable tie. Measure voltage between ground and SRS ECU terminal No.
33 (Yellow/Blue wire) and No. 34 (Yellow/Violet wire). If voltage is measured
at either terminal, go to next step. If zero volt is measured at both terminals,
reconnect components. Erase, then retrieve DTCs. If DTC B1482 is retrieved,
replace SRS ECU. Go to step 7 .
6. Replace wire harness between SRS ECU and clockspring. Go to next step.
7. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1482 is retrieved, go to step 1 . If DTC B1482 is not
retrieved, system is normal at this time.
DTCB1483: DRIVER-SIDE AIR BAG MODULE SECOND-STAGE SHORT TO GROUND 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 dia
gnose CAN bus lines, re
pair CAN bus lines. Go to next

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

step.
2. Erase, then retrieve DTCs. Turn ignition off. If DTC B1483 is retrieved, go to
next step. If DTC B1483 is not retrieved, an intermittent condition may exist.
3. Remove driver-side air bag module. See DRIVER
-SIDE AIR BAG
MODULE & CLOCKSPRING
under REMOVAL & INSTALLATION.
Disconnect driver-side air bag module connector C-305. See Fig. 30
. Connect
Load Resistor (MB991865) to upper clockspring connector using Load
Resistor Adapter (MB991866). Insert load resistor adapter leads into terminals
No. 3 (Yellow/Green wire) and No. 4 (Yellow/Black wire) of connector C-305.
See Fig. 31
. Connect negative battery cable. Erase, then retrieve DTCs. If
DTC B1483 is retrieved, go to next step. If DTC B1483 is not retrieved,
replace driver-side air bag module. Go to step 7 .
4. Disconnect negative battery cable. Disconnect lower clockspring connector C-
307. Connect load resistor and load resistor adapter to terminals No. 11
(Yellow/Blue wire) and No. 12 (Yellow/Violet wire) on harness-side of
connector C-307. See Fig. 32
. Reconnect negative battery cable. Erase, then
retrieve DTCs. If DTC B1483 is retrieved, replace clockspring. Go to step 7 . I
f
DTC B1483 is not retrieved, go to next step.
5. Disconnect negative battery cable. Disconnect clockspring connector C-307.
Disconnect SRS ECU connector. Release SRS ECU connector shorting bar
using a cable tie. Measure resistance between ground and SRS ECU terminal
No. 33 (Yellow/Blue wire) and No. 34 (Yellow/Violet wire). See Fig. 33
. If
resistance is not infinite at both terminals, go to next step. If resistance is
infinite at both terminals, reconnect components. Erase, then retrieve DTCs. If
DTC B1483 is retrieved, replace SRS ECU. Go to step 7 .
6. Replace wire harness between SRS ECU and clockspring. Go to next step.
7. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1483 is retrieved, go to step 1 . If DTC B1401 is not
retrieved, system is normal at this time.
DTC B1484: DRIVER-SIDE AIR BAG MODULE ACTIVATION CIRCUIT SHORT 1. Connect scan tool to Data Link Connector (DLC). See INITIAL SRS
DIAGNOSTIC PROCEDURE
under DIAGNOSTICS. If scan tool is able to
dia
gnose CAN bus lines and CAN bus lines are satis
factor
y, go to next ste
p. If

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

scan tool cannot diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. If DTC B1484 is retrieved, replace SRS ECU. See
SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. If DTC B1484 is not retrieved, an intermittent condition
may exist.
DTC B1485: DRIVER-SIDE AIR BAG MODULE ACTIVATION CIRCUIT OPEN 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 B1485 is retrieved, replace SRS ECU. See
SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. If DTC B1485 is not retrieved, an intermittent condition
may exist.
DTC B1486: PASSENGER SEAT BELT WARNING LIGHT 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. Turn ignition off. If DTC B1486 is retrieved, go to
DTC B1487: PASSENGER SEAT BELT WARNING LIGHT DOES NOT
ILLUMINATE
. If DTC B1486 is not retrieved, an intermittent condition may
exist.
DTC B1487: PASSENGER SEAT BELT WARNING LIGHT DOES NOT ILLUMINATE 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 dia
gnose CAN bus lines, re
pair CAN bus lines. Go to next

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

step.
2. Erase, then retrieve DTCs. Turn ignition off. If DTCs are retrieved, go to next
step. If DTCs are not retrieved, an intermittent condition may exist.
3. If DTC B1530, B1531, B1532, B1533, B1534, B1535, B1536, B1537, B1538,
B1539, B1540, B1541, B1542, B1543, B1545 or B1546 is retrieved, diagnose
appropriate DTC. See DIAGNOSTIC TROUBLE CODES (DTCS) IDENTIFICATION WITH SINGLE
-STAGE AIR BAG SYSTEM
table. If
DTC B1530, B1531, B1532, B1533, B1534, B1535, B1536, B1537, B1538,
B1539, B1540, B1541, B1542, B1543, B1545 or B1546 is not retrieved, go to
next step.
4. Visually inspect passenger seat belt warning light connector C-38. See Fig. 30
.
If connector C-38 is connected correctly, go to next step. If connector C-38 is
not connected correctly, properly connect connector. Go to step 10 .
5. Disconnect connector C-38. Measure voltage between ground and connector
C-38, terminal No. 1 (Black/White wire). See Fig. 40
. If voltage is not about
12 volts, go to next step. If voltage is about 12 volts, go to step 7 .
6. Inspect Black/White wire between terminal No. 1 of connector C-38 and
terminal No. 2 of ignition switch connector C-308, including junction block
connectors C-211 and C-215. See Fig. 22
. If wire is okay, go to next step. If
wire is not okay, repair as necessary. See WIRE REPAIR
. Go to step 10 .
7. Inspect SRS ECU connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. If SRS ECU
connector C-26 is connected correctly, go to next step. If SRS ECU connector
C-26 is not connected correctly, properly connect connector. Go to step 10 .
8. Check Pink wire between connector C-07, terminal No. 3 and SRS ECU
connector C-26, terminal No. 42, for damage, shorts or open circuits. See Fig.
33 . If wire is okay, go to next step. If wire is not okay, repair as necessary. See
WIRE REPAIR
. Go to step 10 .
9. Disconnect negative battery cable. Disconnect SRS ECU connector C-26.
Connect negative battery cable. Connect a jumper wire between ground and
SRS ECU connector C-26, terminal No. 42. If passenger seat belt warning light
does not illuminate, replace passenger seat belt warning light assembly. Go to
next step. If passenger seat belt warning light illuminates, erase, then retrieve
DTCs. If DTC B1487 is retrieved, re
place SRS ECU. Go to next ste
p.

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

BELT warning light comes on and goes off after 7 seconds, go to next step. If
PASSENGER SEAT BELT warning light does not come on and go off after 7
seconds, replace passenger seat belt warning light. Go to step 6 .
5. Inspect Pink wire between connector C-38, terminal No. 3 and SRS ECU
connector C-26, terminal No. 42, for an open circuit. See Fig. 30
. If an open
circuit is not found, reconnect SRS components. Erase, then retrieve DTCs. If
DTC B1487 is retrieved, replace SRS ECU. See SRS ELECTRONIC
CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION. Go
to next step. If an open circuit is found, repair wire as necessary. See WIRE
REPAIR
. Go to next step.
6. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1487 is retrieved, go to step 1 . If DTC B1487 is not
retrieved, system is normal at this time.
DTC B1488: PASSENGER AIR BAG OFF INDICATOR CIRCUIT 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 B1488 is retrieved, go to DTC B1489:
PASSENGER AIR BAG OFF INDICATOR LIGHT DOES NOT ILLUMINATE
. If DTC B1488 is not retrieved, an intermittent condition may
exist.
DTC B1489: PASSENGER AIR BAG OFF INDICATOR LIGHT DOES NOT ILLUMINATE 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 DTCs are retrieved, go to next
step. If DTCs are not retrieved, an intermittent condition may exist.
3. If DTC B1540, B1541, B1542, B1543, B1545 or B1546 is retrieved, dia
gnose

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

appropriate DTC. See DIAGNOSTIC TROUBLE CODES (DTCS) IDENTIFICATION WITH SINGLE
-STAGE AIR BAG SYSTEM
table. If
DTC B1540, B1541, B1542, B1543, B1545 or B1546 is not retrieved, go to
next step.
4. Visually inspect PASSENGER AIR BAG OFF indicator connector C-37. See
Fig. 30
. If connector C-37 is connected correctly, go to next step. If connector
C-37 is not connected correctly, properly connect connector. Go to step 10 .
5. Disconnect connector C-37. Measure voltage between ground and connector
C-37, terminal No. 1 (Black/White wire). See Fig. 41
. If voltage is not about
12 volts, go to next step. If voltage is about 12 volts, go to step 7 .
6. Inspect Black/White wire between terminal No. 1 of connector C-37 and
terminal No. 2 of ignition switch connector C-308, including junction block
connectors C-211 and C-215. See Fig. 22
. If wire is okay, go to next step. If
wire is not okay, repair as necessary. See WIRE REPAIR
. Go to step 10 .
7. Inspect SRS ECU connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. If SRS ECU
connector C-26 is connected correctly, go to next step. If SRS ECU connector
C-26 is not connected correctly, properly connect connector. Go to step 10 .
8. Check Blue/Yellow wire between connector C-37, terminal No. 3 and SRS
ECU connector C-26, terminal No. 21, for damage, shorts or open circuits. See
Fig. 33
. If wire is okay, go to next step. If wire is not okay, repair as
necessary. Go to step 10 .
9. Disconnect negative battery cable. Disconnect SRS ECU connector C-26.
Connect negative battery cable. Connect a jumper wire between ground and
SRS ECU connector C-26, terminal No. 21. If PASSENGER AIR BAG OFF
warning light does not illuminate, replace PASSENGER AIR BAG OFF
warning light assembly. Go to next step. If PASSENGER AIR BAG OFF
warning light illuminates, erase, then retrieve DTCs. If DTC B1489 is
retrieved, replace SRS ECU. Go to next step.
10. Reconnect all SRS components. Activate air bag system. Using scan tool,
retrieve DTCs. If DTC B1489 is retrieved, go to step 1 . If DTC B1489 is not
retrieved, s
ystem is normal at this time.

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

Fig. 41: Identifying Connector C
-37 Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC B1489: PASSENGER AIR BAG OFF INDICATOR LIGHT DOES NOT TURN OFF 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 DTCs are retrieved, go to next
step. If DTCs are not retrieved, an intermittent condition may exist.
3. If DTC B1540, B1541, B1542, B1543, B1545 or B1546 is retrieved, diagnose
appropriate DTC. See DIAGNOSTIC TROUBLE CODES (DTCS)
IDENTIFICATION WITH SINGLE
-STAGE AIR BAG SYSTEM
table. If
DTC B1540, B1541, B1542, B1543, B1545 or B1546 is not retrieved, go to
next step.
4. Using scan tool, request ACTUATOR TEST ITEM No. 03: PASSENGER AIR
BAG OFF WARNING LIGHT ILLUMINATION. If PASSENGER AIR BAG
OFF warning light comes on and goes off after 7 seconds, go to next step. If
PASSENGER AIR BAG OFF warning light does not come on and go off after
7 seconds, replace PASSENGER AIR BAG OFF warning light. Go to step 6 .
5. Check Blue/Yellow wire between connector C-37, terminal No. 3 and SRS
ECU connector C-26, terminal No. 21, for damage, shorts or open circuits. See

2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems