2004 MITSUBISHI ENDEAVOR ECU

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

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

DIAGNOSTIC TESTS INSPECTION PROCEDURE 1 No communication between scan tool and all systems is most likely in power
supply or ground circuits to Data Link Connector (DLC). Check wire harness and
connectors for damage and loose connections. See WIRING DIAGRAMS
.
INSPECTION PROCEDURE 2 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disconnect
SRS ECU connector C-26. See SRS ELECTRONIC CONTROL UNIT
(SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
. Measure
resistance between SRS ECU connector C-26, terminal No. 20 (Orange/Blue
wire) and Data Link Connector (DLC), terminal No. 7 (Orange/Blue wire). See
Fig. 20
& Fig. 21
. If resistance is more than 2 ohms, go to next step. If
resistance is 2 ohms or less, go to step 4 .
2. Measure resistance between SRS ECU connector C-26, terminal No. 15 (Black
wire) and ground. If resistance is less than 2 ohms, go to next step. If resistance
is 2 ohms or more, go to step 5 .
3. Connect negative battery cable. Turn ignition on. Measure voltage between
ground and SRS ECU connector C-26, terminals No. 13 (Black/White wire)
and No. 16 (Black/Yellow wire). If voltage is less than 9 volts at either
terminal, go to step 6 . If voltage at both terminals is 9 volts or more, recheck
trouble s
ymptom. If s
ymptom still exists, re
place SRS ECU. Go to ste
p 7 .
B1547

Cut off for passenger-side air bag module
B1552

Changing circuit short
B1553

Changing circuit open
B1554

SG by-pass circuit malfunction
B1555

SG by-pass circuit (FET) open
B1556

Seat slide sensor malfunction
B1557

SRS ECU ASIC
B1558

Occupant classification ECU ID cord malfunction
U1073

BUS of
f

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

4. Inspect wire harness between SRS ECU connector C-26, terminal No. 20
(Orange/Blue wire) and Data Link Connector C-23, terminal No. 7
(Orange/Blue wire), including connector C-104, for damage, loose connectors
or poor connections. If wire harness is okay, go to step 7 . If wire harness is not
okay, replace wire harness. Go to step 7 .
5. Inspect wire harness between SRS ECU connector C-26, terminals No. 15
(Black wire) and ground. If wire harness is okay, go to step 7 . If wire harness
is not okay, replace wire harness. Go to step 7 .
6. Inspect wire harness between SRS ECU connector C-26, terminals No. 13
(Black/White wire) and No. 16 (Black/Yellow wire) and ignition switch
connector C-308, including connectors C-211 and C-215. See Fig. 22
. If wire
harness is okay, go to next step. If wire harness is not okay, replace wire
harness. Go to step 7 .
7. Connect all SRS connectors. If scan tool communicates normally with SRS,
repair is complete. If communication is not normal, intermittent condition may
exist.

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

Fig. 20: Identifying Data Link Connector (DLC) Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig. 21: Identifying SRS ECU Connector C
-25 & C
-26 Terminals (Single
-stage
Air Bag System)

Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

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

Fig. 22: Identifying Connector C
-211 & C
-215 Locations

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC 1A, 1B, 1C, 1D: DRIVER-SIDE FRONT IMPACT SENSOR MALFUNCTION 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
Remove driver-side front impact sensor. See FRONT IMPACT SENSOR

under REMOVAL & INSTALLATION. Go to next step.
2. Inspect driver-side front impact sensor. See FRONT IMPACT SENSOR
under COMPONENT TESTING. If front impact sensor is okay, go to next
step. If front impact sensor is not okay, replace front impact sensor. Go to step
7 .
3. Disconnect SRS connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
.
Disconnect driver-side front impact sensor connector A-21. Measure resistance
between SRS ECU connector C-26, terminal No. 3 (Black/Blue wire) and
terminal No. 4 (White/Blue wire) See Fig. 21
. Resistance should be infinite.
Measure resistance between
passen
ger-side front im
pact connector
A-21,

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

terminal No. 1 (Black/Red wire) and terminal No. 2 (White/Red wire).
Resistance should be infinite. See Fig. 23
. Go to next step.
4. Measure resistance between ground and SRS ECU connector C-26, terminals
No. 3 and 4. Resistance should be infinite. Measure resistance between ground
and front impact sensor connector A-21, terminal No. 1 and 2. Resistance
should be infinite.
5. Connect negative battery cable. Measure voltage between ground and SRS
ECU connector C-26, terminals No. 1 and 2. Voltage should not be present.
Measure voltage between ground and front impact sensor connector A-21,
terminal No. 1 and 2. Voltage should not be present. If resistance and voltage
checks are not as specified, go to next step. If resistance and voltage checks are
as specified, go to step 7 .
6. Visually inspect wire harness between SRS ECU connector C-26 and driver-
side front impact sensor connector A-21, including connector C-31. If wire
harness and connectors are okay, go to next step. If wire harness and
connectors are damaged, replace wire harness. Go to next step.
7. Reconnect all SRS components. Using scan tool, check for DTCs. If DTC 1A,
1B, 1C or 1D is retrieved, replace SRS ECU. If DTC 1A, 1B, 1C or 1D is not
retrieved, system is normal at this time. Intermittent condition may exist.
Fig. 23: Identifying Connector A
-21 & A
-24 Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC 2A, 2B, 2C, 2D: PASSENGER-SIDE FRONT IMPACT SENSOR MALFUNCTION
2004 Mitsubishi Endeavor Limited
2004 ACCESSORIES/SAFETY EQUIPMENT Mitsubishi - Air Bag Restraint Systems

1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
Remove passenger-side front impact sensor. See FRONT IMPACT SENSOR
under REMOVAL & INSTALLATION. Go to next step.
2. Inspect passenger-side front impact sensor. See FRONT IMPACT SENSOR

under COMPONENT TESTING. If front impact sensor is okay, go to next
step. If front impact sensor is not okay, replace front impact sensor. Go to step
7 .
3. Disconnect SRS connector C-24. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
.
Disconnect passenger-side front impact sensor connector A-24. Measure
resistance between SRS ECU connector C-24, terminal No. 1 (White/Red wire)
and No. 2 (Black/Red wire) See Fig. 21
. Resistance should be infinite.
Measure resistance between passenger-side front impact connector A-24,
terminal No. 1 (Black/Red wire) and No. 2 (White/Red wire). Resistance
should be infinite. See Fig. 23
. Go to next step.
4. Measure resistance between ground and SRS ECU connector C-24, terminals
No. 1 and 2. Resistance should be infinite. Measure resistance between ground
and front impact sensor connector A-24, terminal No. 1 and 2. Resistance
should be infinite.
5. Connect negative battery cable. Measure voltage between ground and SRS
ECU connector C-24, terminals No. 1 and 2. Voltage should not be present.
Measure voltage between ground and front impact sensor connector A-24,
terminal No. 1 and 2. Voltage should not be present. If resistance and voltage
checks are not as specified, go to next step. If resistance and voltage checks are
as specified, go to step 7 .
6. Visually inspect wire harness between SRS ECU connector C-24 and
passenger-side front impact sensor connector A-24. If wire harness and
connectors are okay, go to next step. If wire harness and connectors are
damaged, replace wire harness. Go to next step.
7. Reconnect all SRS components. Using scan tool, check for DTCs. If DTC 2A,
2B, 2C or 2D is retrieved, replace SRS ECU. If DTC 2A, 2B, 2C or 2D is not
retrieved, system is normal at this time. Intermittent condition may exist.
DTC 11
, 12 & 13: FRONT IMPACT SENSOR CIRCUIT

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

1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Go
to next step.
2. Remove front impact sensors. See FRONT IMPACT SENSOR
under
REMOVAL & INSTALLATION. Inspect front impact sensors. See FRONT
IMPACT SENSOR
under COMPONENT TESTING. If front impact sensors
are okay, go to next step. If front impact sensors are not okay, replace front
impact sensors. Go to step 6 .
3. Install front impact sensors. Connect front impact sensor connectors.
Disconnect SRS ECU connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
.
Measure resistance between SRS connector C-26, terminals No. 3 (Black/Blue
wire) and No. 4 (White/Blue wire). See Fig. 21
. If resistance is 738-902 ohms,
go to next step. If resistance is not 738-902 ohms, check wire harness between
SRS ECU connector C-26 and left front impact sensor connector A-21.
Replace wire harness, if damaged. Go to step 6 .
4. Measure resistance between SRS connector C-26, terminals No. 1 (White/Red
wire) and No. 2 (Black/Red wire). If resistance is not 738-902 ohms, go to next
step. If resistance is 738-902 ohms, replace SRS ECU. Go to step 6
.
5. Inspect wire harness between SRS ECU connector C-26 and right front impact
sensor connector A-27. If wire harness is okay, go to next step. Replace wire
harness, if damaged. Go to next step.
6. Reconnect SRS components. Activate air bag system. Using scan tool, check
for DTCs. If DTCs 11, 12 or 13 are retrieved by scan tool, go to step 1 . If
DTCs 11, 12 or 13 are not retrieved by scan tool, system is normal at this time.
Intermittent condition may exist.
DTC 14: ANALOG "G" SENSOR SYSTEM If DTC 14 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION.
DTC 15, 16, 17: SAFING SENSOR CIRCUIT If DTC 15, 16 or 17 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT
(SRS ECU
)under REMOVAL & INSTALLATION.

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