2004 MITSUBISHI ENDEAVOR can bus

between SRS ECU and seat slide sensor. Go to next step.
5. Erase, then retrieve DTCs. If DTC B1506 is retrieved, go to step 1 . If DTC
B1506 is not retrieved, system is normal at this time.
Fig. 42: Identifying Connector D
-37 Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC B1507: SEAT SLIDE SENSOR CIRCUIT 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 diagnose CAN bus lines, repair CAN bus lines. Go to next
step.
2. Erase, then retrieve DTCs. Turn ignition off. If DTC B1507 is retrieved, go to
next step. If DTC B1507 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect seat slide sensor connector D-
37, located under passenger-side front seat. See SEAT SLIDE SENSOR

under REMOVAL & INSTALLATION. Connect Load Resistor (MB991865)
to Load Resistor Adapter (MB991866). Insert load resistor adapter leads into
harness-side terminals No. 1 (Brown wire) and No. 2 (Brown/White wire) of
connector D-37. See Fig. 42
. Connect negative battery cable. Using scan tool,
erase
, then retrieve DTCs. If DTC B1507 is retrieved
, go to next ste
p. If DTC

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

B1507 is not retrieved, replace seat slide sensor. Go to step 5 .
4. Disconnect SRS ECU connector C-40. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 30
.
Remove load resistor and load resistor adapter from connector D-37. Measure
resistance between ground and SRS ECU connector C-40, terminal No. 2
(Brown wire). See Fig. 33
. Measure resistance between ground and SRS ECU
connector C-40, terminal No. 1 (Brown/White wire). If resistance is infinite at
both terminals, reconnect SRS components. Erase, then retrieve DTCs. If DTC
B1507 is retrieved, replace SRS ECU. If resistance is not infinite at both
terminals, replace wire harness between SRS ECU and seat slide sensor. Go to
next step.
5. Erase, then retrieve DTCs. If DTC B1507 is retrieved, go to step 1 . If DTC
B1507 is not retrieved, system is normal at this time.
DTC B1508: SEAT SLIDE SENSOR CIRCUIT SHORT TO VOLTAGE 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 B1508 is retrieved, go to
next step. If DTC B1508 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect seat slide sensor connector D-
37, located under passenger-side front seat. See SEAT SLIDE SENSOR

under REMOVAL & INSTALLATION. Connect Load Resistor (MB991865)
to Load Resistor Adapter (MB991866). Insert load resistor adapter leads into
harness-side terminals No. 1 (Brown wire) and No. 2 (Brown/White wire) of
connector D-37. See Fig. 42
. Connect negative battery cable. Using scan tool,
erase, then retrieve DTCs. If DTC B1508 is retrieved, go to next step. If DTC
B1508 is not retrieved, replace seat slide sensor. Go to step 5 .
4. Disconnect SRS ECU connector C-40. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 30
.
Remove load resistor and load resistor adapter from connector D-37. Measure
volta
ge between
ground and SRS ECU connector
C-40, terminal No. 2
(Brown

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

wire). See Fig. 33
. Measure voltage between ground and SRS ECU connector
C-40, terminal No. 1 (Brown/White wire). If zero volt is measured at both
terminals, reconnect SRS components. Erase, then retrieve DTCs. If DTC
B1508 is retrieved, replace SRS ECU. If voltage is measured at either terminal,
replace wire harness between SRS ECU and seat slide sensor. Go to next step.
5. Erase, then retrieve DTCs. If DTC B1508 is retrieved, go to step 1 . If DTC
B1508 is not retrieved, system is normal at this time.
DTC B1509: INCORRECT SRS ECU 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 B1509 is retrieved, replace SRS ECU. See
SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. If DTC B1509 is not retrieved, an intermittent condition
may exist.
DTC B1519: SRS ECU CONNECTOR LOCK 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 B1519 is retrieved, go to
next step. If DTC B1519 is not retrieved, an intermittent condition may exist.
3. Inspect SRS ECU connectors C-25, C-26 and C-40. See SRS ELECTRONIC
CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See
Fig. 30
. If connectors are connected properly, go to next step. If connectors
are not connected properly, reconnect properly. Go to step 5 .
4. Inspect and ensure lock contacts on SRS ECU connectors C-25, C-26 and C-40
are functioning properly and are not damaged. If connectors are not okay,
re
place wirin
g harness. Go to next ste
p. If connec
tors are oka
y, erase, then

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

retrieve DTCs. If DTC B1519 is retrieved, replace SRS ECU. Go to next step.
5. Erase, then retrieve DTCs. If DTC B1519 is retrieved, replace SRS ECU. See
SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. If DTC B1519 is not retrieved, an intermittent condition
may exist.
DTC B1520: SEAT BELT SWITCH (RH) 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 B1520 is retrieved, go to
next step. If DTC B1520 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect passenger-side seat belt buckle
connector D-39. See Fig. 30
. Latch seat belt into seat belt buckle. Measure
resistance between connector D-39, terminals No. 1 and 3. See Fig. 43
.
Resistance should be 800-840 ohms. Resistance between ground and terminal
No. 1 and 3 should be infinite. Unlatch seat belt buckle. Measure resistance
between terminal No. 2 and 3 of connector D-39. Resistance should be 800-
840 ohms. Resistance between ground and terminal No. 2 and 3 should be
infinite. If resistance is as specified, go to next step. If resistance is not as
specified, replace front seat belt buckle. Go to step 6 .
4. Reconnect seat belt buckle connector D-39. Disconnect SRS ECU connector
C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under
REMOVAL & INSTALLATION. Measure resistance between SRS ECU
connector C-25, terminals No. 51 (Brown/Red wire) and No. 65 (Orange/Black
wire). See Fig. 33
. If resistance is 738-902 ohms, reconnect SRS components.
Erase, then retrieve DTCs. If DTC B1520 is retrieved, replace SRS ECU. Go to
step 6 . If DTC B1520 is not retrieved, go to next step.
5. Inspect wire harness between SRS ECU connector C-25 and passenger seat
belt buckle connector D-29 for damage. If wires are okay, go to next step. If
wires are not okay, replace wire harness. Go to next step.
6. Erase, then retrieve DTCs. If DTC B1520 is retrieved,
go to ste
p 1 . If DTC

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

B1520 is not retrieved, system is normal at this time.
Fig. 43: Identifying Connector D
-39 Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC B1521: SEAT BELT SWITCH (RH) CIRCUIT OPEN FOR N/C TERMINAL 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 B1521 is retrieved, go to
next step. If DTC B1521 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect passenger-side seat belt buckle
connector D-39. See Fig. 30
. Latch seat belt into seat belt buckle. Measure
resistance between connector D-39, terminals No. 1 and 3. See Fig. 43
.
Resistance should be 800-840 ohms. Resistance between ground and terminal
No. 1 and 3 should be infinite. Unlatch seat belt buckle. Measure resistance
between terminal No. 2 and 3 of connector D-39. Resistance should be 800-
840 ohms. Resistance between ground and terminal No. 2 and 3 should be
infinite. If resistance is as s
pecified
, go to nex
t ste
p. If resistance is not as

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

specified, replace front seat belt buckle. Go to step 6 .
4. Reconnect seat belt buckle connector D-39. Disconnect SRS ECU connector
C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under
REMOVAL & INSTALLATION. Measure resistance between SRS ECU
connector C-25, terminal No. 51 (Brown/Red wire) and No. 65 (Orange/Black
wire). See Fig. 33
. If resistance is 738-902 ohms, reconnect SRS components.
Erase, then retrieve DTCs. If DTC B1521 is retrieved, replace SRS ECU. Go to
step 6 . If DTC B1521 is not retrieved, go to next step.
5. Inspect wire harness between SRS ECU connector C-25 and passenger seat
belt buckle connector D-29 for damage. If wires are okay, go to next step. If
wires are not okay, replace wire harness. Go to next step.
6. Erase, then retrieve DTCs. If DTC B1521 is retrieved, go to step 1 . If DTC
B1521 is not retrieved, system is normal at this time.
DTC B1522: SEAT BELT SWITCH (RH) GROUND-SIDE CIRCUIT SHORTED FOR N/C
TERMINAL 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 B1522 is retrieved, go to
next step. If DTC B1522 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect passenger-side seat belt buckle
connector D-39. See Fig. 30
. Latch seat belt into seat belt buckle. Measure
resistance between connector D-39, terminals No. 1 and 3. See Fig. 43
.
Resistance should be 800-840 ohms. Resistance between ground and terminal
No. 1 and 3 should be infinite. Unlatch seat belt buckle. Measure resistance
between terminal No. 2 and 3 of connector D-39. Resistance should be 800-
840 ohms. Resistance between ground and terminal No. 2 and 3 should be
infinite. If resistance is as specified, go to next step. If resistance is not as
specified, replace front seat belt buckle. Go to step 6 .
4. Reconnect seat belt buckle connector D-39. Disconnect SRS ECU connector
C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
unde
r

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

REMOVAL & INSTALLATION. Measure resistance between SRS ECU
connector C-25, terminal No. 51 (Brown/Red wire) and No. 65 (Orange/Black
wire). See Fig. 33
. If resistance is 738-902 ohms, reconnect SRS components.
Erase, then retrieve DTCs. If DTC B1522 is retrieved, replace SRS ECU. Go to
step 6 . If DTC B1522 is not retrieved, go to next step.
5. Inspect wire harness between SRS ECU connector C-25 and passenger seat
belt buckle connector D-29 for damage. If wires are okay, go to next step. If
wires are not okay, replace wire harness. Go to next step.
6. Erase, then retrieve DTCs. If DTC B1522 is retrieved, go to step 1 . If DTC
B1522 is not retrieved, system is normal at this time.
DTC B1523: SEAT BELT SWITCH (RH) POWER-SIDE CIRCUIT SHORTED FOR N/C TERMINAL 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 B1523 is retrieved, go to
next step. If DTC B1523 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect passenger-side seat belt buckle
connector D-39. See Fig. 30
. Latch seat belt into seat belt buckle. Measure
resistance between connector D-39, terminals No. 1 and 3. See Fig. 43
.
Resistance should be 800-840 ohms. Resistance between ground and terminal
No. 1 and 3 should be infinite. Unlatch seat belt buckle. Measure resistance
between terminal No. 2 and 3 of connector D-39. Resistance should be 800-
840 ohms. Resistance between ground and terminal No. 2 and 3 should be
infinite. If resistance is as specified, go to next step. If resistance is not as
specified, replace front seat belt buckle. Go to step 6 .
4. Reconnect seat belt buckle connector D-39. Disconnect SRS ECU connector
C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under
REMOVAL & INSTALLATION. Measure resistance between SRS ECU
connector C-25, terminal No. 51 (Brown/Red wire) and No. 65 (Orange/Black
wire). See Fig. 33
. If resistance is 738-902 ohms, reconnect SRS components.
Erase, then retrieve DTCs. If DTC B1523 is retrieved, re
place SRS ECU. Go to

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

step 6 . If DTC B1523 is not retrieved, go to next step.
5. Inspect wire harness between SRS ECU connector C-25 and passenger seat
belt buckle connector D-29 for damage. If wires are okay, go to next step. If
wires are not okay, replace wire harness. Go to next step.
6. Erase, then retrieve DTCs. If DTC B1523 is retrieved, go to step 1 . If DTC
B1523 is not retrieved, system is normal at this time.
DTC B1524: SEAT BELT SWITCH (RH) CIRCUIT OPEN FOR N/O TERMINAL 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 B1524 is retrieved, go to
next step. If DTC B1524 is not retrieved, an intermittent condition may exist.
3. Disconnect negative battery cable. Disconnect passenger-side seat belt buckle
connector D-39. See Fig. 30
. Latch seat belt into seat belt buckle. Measure
resistance between connector D-39, terminals No. 1 and 3. See Fig. 43
.
Resistance should be 800-840 ohms. Resistance between ground and terminal
No. 1 and 3 should be infinite. Unlatch seat belt buckle. Measure resistance
between terminal No. 2 and 3 of connector D-39. Resistance should be 800-
840 ohms. Resistance between ground and terminal No. 2 and 3 should be
infinite. If resistance is as specified, go to next step. If resistance is not as
specified, replace front seat belt buckle. Go to step 6 .
4. Reconnect seat belt buckle connector D-39. Disconnect SRS ECU connector
C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under
REMOVAL & INSTALLATION. Measure resistance between SRS ECU
connector C-25, terminal No. 51 (Brown/Red wire) and No. 65 (Orange/Black
wire). See Fig. 33
. If resistance is 738-902 ohms, reconnect SRS components.
Erase, then retrieve DTCs. If DTC B1524 is retrieved, replace SRS ECU. Go to
step 6 . If DTC B1524 is not retrieved, go to next step.
5. Inspect wire harness between SRS ECU connector C-25 and passenger seat
belt buckle connector D-29 for damage. If wires are okay, go to next step. If
wires are not okay, re
place wire harness. Go to next ste
p.

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