control module MITSUBISHI ENDEAVOR 2004 Service Repair Manual

2004 ACCESSORIES/SAFETY EQUIPMENT
Mitsubishi - Air Bag Restraint Systems
DESCRIPTION & OPERATION Supplemental Restraint System (SRS) components on vehicles with single-stage air
bag systems include single-stage driver-side and passenger-side air bag modules,
side impact air bag modules, seat belt pretensioners, front impact sensors, side
impact sensors, SRS Electronic Control Unit (SRS ECU) and an AIR BAG warning
light or SRS warning light.
SRS components on vehicles with dual-stage air bag systems include dual-stage
driver-side and passenger-side air bag modules, side impact air bag modules, seat
belt pretensioners, front impact sensors, side impact sensors, SRS Electronic
Control Unit (SRS ECU), occupant classification sensor, occupant classification
sensor ECU, seat belt switches, AIR BAG warning light or SRS warning light,
PASSENGER AIR BAG OFF warning light and a PASSENGER SEAT BELT
warning light. COMPONENT LOCATIONS Refer to illustration for SRS com
ponent locations. See
Fig. 1
&
Fig. 2
.
WARNING:Accidental air bag deployment is possible. Personal
injury may result. Read and follow all WARNINGS
and AIR BAG SAFETY PRECAUTIONS
before
working on air bag system or related components.

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


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

CONSOLE ASSEMBL
Y . Remove left and right A-pillar trim panels.
Remove hood lock release handle.
3. Remove end panel. See Fig. 8
. Remove driver-side knee bolster. Remove fog
light switch. Remove steering column upper and lower covers. Remove
combination meter assembly. Remove center panel assembly. Remove air
vents. Remove radio panel. Remove AC-heater control assembly.
4. Remove hazard warning switch. Remove console meter hood. Remove multi-
center display unit. Remove audio components. Remove glove box assembly.
Remove left and right speaker covers. Remove speakers. Disconnect
clockspring and steering column switch connectors. Remove photo sensor and
photo sensor clamp.
5. Remove interior temperature sensor. Disconnect passenger-side air bag module
connector. Remove left and right center instrument panel brackets. Disconnect
remaining electrical connectors. Remove instrument panel nuts and bolts.
Remove instrument panel.
6. To install, reverse removal procedure. Tighten NEW steering wheel nut and
drive
r-side air ba
g module bolts to s
pecification. Activate air ba
g system.

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

DTC 21: DRIVE
R-SIDE AIR BAG MODULE SHORT CIRCUIT
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. If DTC 34 is
retrieved, go to next step. If DTC 34 is not retrieved, go to step 3 .
2. Inspect SRS ECU connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
. If
SRS ECU connector C-26 is connected correctly, go to next step. If SRS ECU
connector is not connected properly, install connector correctly. Go to step 8 .
3. Disconnect negative battery cable. Disconnect, then reconnect SRS ECU
connector C-26, lower clockspring connector C-307 and driver-side air bag
module connector C-305. See DRIVER
-SIDE AIR BAG MODULE &
CLOCKSPRING
under REMOVAL & INSTALLATION. Connect negative
battery cable. Using scan tool, erase then retrieve DTCs. If DTC 21 is
retrieved, go to next step. If DTC 21 is not retrieved, system is normal at this
time.
4. Disconnect negative battery cable. Connect Resistor Harness (MB991866) to
terminals of upper clockspring connector C-306 by backprobing connector.
Connect Load Resistor (MB991865) to resistor harness. Connect negative
battery cable. Using scan tool, erase then retrieve DTCs. If DTC 21 is
retrieved, go to next step. If DTC 21 is not retrieved, replace driver-side air bag
module. Go to step 8 .
5. Disconnect negative battery cable. Connect resistor harness and load resistor to
terminals No. 3 and 4 of clockspring connector C-307 by backprobing
connector. See Fig. 24
. Connect negative battery cable. Using scan tool, erase
then retrieve DTCs. If DTC 21 is retrieved, go to next step. If DTC 21 is not
retrieved, replace clockspring. Go to step 8 .
6. Disconnect SRS ECU connector C-26 and clockspring connector C-307. Insert
a cable tie or similar insulator between terminals No. 11 (Yellow/Black wire)
and No. 12 (Yellow wire) of SRS ECU connector to release shorting bar. See
Fig. 21
. Check for continuity between terminals No. 11 and 12. If continuity
exists, go to next step. If continuity does not exist, erase, then retrieve DTCs
using scan tool. If DTC 21 is retrieved, replace SRS ECU. Go to step 8 .
7. Check wire harness between SRS ECU connector C-26 and lower clockspring
connector C-307 for a short circuit. If wire harness is okay, go to next step. If
wire harness has a short circuit, replace wire harness. Go to next step

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

go to next step. If DTC 22 is not retrieved, replace driver-side air bag module.
Go to step 4 .
2. Disconnect negative battery cable. Disconnect clockspring connector C-307.
Connect resistor harness to clockspring connector C-307 by backprobing
connector terminals No. 3 and 4. See Fig. 24
. Connect negative battery cable.
Using scan tool, erase then retrieve DTCs. If DTC 22 is retrieved, go to next
step. If DTC 22 is not retrieved, replace clockspring. Go to step 4 .
3. Disconnect SRS ECU connector C-26 and clockspring connector C-307. See
SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL &
INSTALLATION. Measure resistance between connector C-26, terminal No.
11 (Yellow/Black wire) and clockspring connector C-307, terminal No. 3.
Measure resistance between connector C-26, terminal No. 12 (Yellow wire)
and clockspring connector C-307, terminal No. 4. If resistance is less than 2
ohms in each circuit, recheck for DTCs. If DTC 22 is retrieved, replace SRS
ECU. Go to next step. If resistance is more than 2 ohms in either wire, replace
wire harness between SRS ECU and clockspring. Go to next step.
4. Reconnect all SRS components. Activate air bag system. Using scan tool, erase
then retrieve DTCs. If DTC 22 is retrieved, go to step 1 . If DTC 22 is not
retrieved, system is normal at this time. Intermittent condition may exist.
DTC 24: PASSENGER-SIDE AIR BAG MODULE SHORT CIRCUIT 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. If
DTC 34 is retrieved, go to next step. If DTC 34 is not retrieved, go to step 3 .
2. Inspect SRS ECU connector C-26. See SRS ELECTRONIC CONTROL
UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
. If
connector is not connected properly, connect properly. Go to step 7 . If
connector is connected properly, go to next step.
3. Disconnect negative battery cable. Disconnect, then reconnect passenger-side
air bag module connector C-09 and SRS ECU connector C-26. See
PASSENGER
-SIDE AIR BAG MODULE
under REMOVAL &
INSTALLATION. Connect negative battery cable. Using scan tool, erase then
retrieve DTCs. If DTC 24 is retrieved, go to next step. If DTC 24 is not
retrieved, s
ystem is normal at this time.

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

then retrieve DTCs. If DTC 43 is retrieved, replace SRS ECU. If DTC 43 is not
retrieved, system is normal at this time. Intermittent condition may exist.
DTC 43: AIR BAG WARNING LIGHT STAYS ILLUMINATED 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
Inspect Green/Yellow wire between SRS ECU connector C-26, terminal No. 8
and combination meter assembly connector C-102, terminal No. 10 for an open
circuit. See Fig. 21
& Fig. 27
. If an open circuit is not found, go to next step.
If an open circuit is found, repair wire harness. Go to step 3 .
2. Reconnect SRS components. Using scan tool, erase, then retrieve DTCs. If
DTC 43 is retrieved, replace combination meter assembly. If DTC 43 is not
retrieved, system is normal at this time. Intermittent condition may exist.
3. Reconnect all SRS components. Activate air bag system. Using scan tool, erase
then retrieve DTCs. If DTC 43 is retrieved, go to step 1 . If DTC 43 is not
retrieved, system is normal at this time. Intermittent condition may exist.
DTC 44: AIR BAG WARNING LIGHT CIRCUIT 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. If AIR BAG
warning light is working normally, use scan tool to retrieve SRS DTCs. If DTC
43 is retrieved, diagnose appropriate malfunction.
2. If DTC 44 is retrieved, no further action is necessary. DTC 44 will be
automatically erased when vehicle condition returns to normal.
DTC 46: IMPROPER SRS ECU INSTALLATION If DTC 46 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION.
DTC 51 & 52: DRIVER-SIDE AIR BAG MODULE If DTC 51 or 52 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION.
DTC 54 & 55: PASSENGE
R-SIDE AIR BAG MODULE

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

If DTC 54 or 55 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION.
DTC 56 & 57: DRIVER-SIDE SEAT BELT PRETENSIONER If DTC 56 or 57 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION.
DTC 58 & 59: PASSENGER-SIDE SEAT BELT PRETENSIONER If DTC 58 or 59 is present, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION.
DTC 61: DRIVER-SIDE AIR BAG MODULE SHORT TO VOLTAGE 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Go
to next step.
2. Disconnect clockspring connector C-305. See DRIVER
-SIDE AIR BAG
MODULE & CLOCKSPRING
under REMOVAL & INSTALLATION. See
Fig. 19
. Connect Load Resistor (MB991865) to Load Resistor Harness
(MB991866). Connect load resistor harness to clockspring connector C-305 by
backprobing connector. Connect negative battery cable. Using scan tool, check
for DTCs. If DTC 61 is retrieved, go to next step. If DTC 61 is not retrieved,
replace driver-side air bag module. Go to step 5 .
3. Disconnect negative battery cable. Disconnect clockspring connector C-307.
Connect load resistor and load resistor harness to clockspring connector C-307,
terminals No. 3 and 4 by backprobing connector. See Fig. 24
. Connect
negative battery cable. Using scan tool check for DTCs. If DTC 61 is retrieved,
go to next step. If DTC 61 is not retrieved, replace clockspring. Go to step 5 .
4. Disconnect SRS ECU connector C-26. Disconnect clockspring connector C-
307. Turn ignition on. Measure voltage between ground and SRS ECU
connector C-26, terminal No. 11 (Yellow/Black wire) and No. 12 (Yellow
wire). If voltage is measured at either terminal, replace wire harness. Go to
next step. If voltage is not measured, reconnect SRS components. Using scan
tool, erase then retrieve DTCs. If DTC 61 is retrieved, replace SRS ECU. Go to
next ste
p. If DTC 61 is not retrieved,
go to next ste
p.

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

19 . Connect Load Resistor (MB991865) to Load Resistor Harness
(MB991866). Connect load resistor harness to connector C-09 by backprobing
connector. Connect negative battery cable. Using scan tool, erase then retrieve
DTCs. If DTC 64 is retrieved, go to next step. If DTC 64 is not retrieved,
replace passenger-side impact air bag module. Go to step 3 .
2. Disconnect SRS ECU connector C-26 and passenger-side air bag module
connector C-09. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)

under REMOVAL & INSTALLATION. Turn ignition on. Check for voltage
between ground and connector C-26, terminal No. 9 (Yellow/Green wire) and
No. 10 (Yellow/Red wire). If voltage is measured in either wire, replace wire
harness. Go to next step. If voltage is not measured in either wire, erase, then
retrieve DTCs. If DTC 64 is retrieved, replace SRS ECU. Go to next step.
3. Reconnect all SRS components. Activate air bag system. Using scan tool, erase
then retrieve DTCs. If DTC 64 is retrieved, go to step 1 . If DTC 64 is not
retrieved, system is normal at this time. Intermittent condition may exist.
DTC 65: PASSENGER-SIDE AIR BAG MODULE SHORT TO GROUND 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
Disconnect passenger-side air bag module connector C-09. See PASSENGER
-
SIDE AIR BAG MODULE
under REMOVAL & INSTALLATION. See Fi
g.
19 . Connect Load Resistor (MB991865) to Load Resistor Harness
(MB991866). Connect load resistor harness to connector C-09 by backprobing
connector. Connect negative battery cable. Using scan tool, erase then retrieve
DTCs. If DTC 65 is retrieved, go to next step. If DTC 65 is not retrieved,
replace passenger-side impact air bag module. Go to step 3 .
2. Disconnect SRS ECU connector C-26 and passenger-side air bag module
connector C-09. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)

under REMOVAL & INSTALLATION. Check for continuity between ground
and connector C-26, terminal No. 9 (Yellow/Green wire) and No. 10
(Yellow/Red wire). If continuity exists, replace wire harness between SRS
ECU and passenger-side air bag module. Go to next step. If continuity does not
exist, erase then retrieve DTCs. If DTC 65 is retrieved, replace SRS ECU. Go
to next ste
p.

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

and No. 28 (Red/White wire). If voltage is measured at one or both terminals,
replace wire harness between SRS ECU and passenger-side seat belt
pretensioner. Go to next step. If voltage not measured at both terminals,
reconnect SRS components. Using scan tool, erase then retrieve DTCs. If DTC
68 is retrieved, replace SRS ECU. Go to next step.
4. Reconnect all SRS components. Using scan tool, check for DTCs. If DTC 68 is
retrieved, go to step 1 . If DTC 68 is not retrieved, system is normal at this
time. Intermittent condition may exist.
DTC 69: PASSENGER-SIDE SEAT BELT PRETENSIONER SHORT TO GROUND 1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS
. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Go
to next step.
2. Disconnect passenger-side seat belt pretensioner connector D-32. See SEAT
BELT PRETENSIONER
under REMOVAL & INSTALLATION. See Fig.
19 . Connect Load Resistor (MB991865) to Load Resistor Harness
(MB991884). Connect load resistor harness to connector D-32. Connect
negative battery cable. Using scan tool, erase then retrieve DTCs. If DTC 69 is
retrieved, go to next step. If DTC 69 is not retrieved, replace passenger-side
seat belt pretensioner. Go to step 4 .
3. Disconnect SRS ECU connector C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION. Remove load
resistor harness from connector D-32. Check for continuity between ground
and SRS ECU connector C-25, terminal No. 27 (Red wire) and No. 28
(Red/White wire). If continuity does not exist in either circuit, erase, then
retrieve DTCs. If DTC 69 is retrieved, replace SRS ECU. Go to step 4 . If
continuity exists in one or both circuits, replace wire harness between SRS
ECU and passenger-side seat belt pretensioner. Go to next step.
4. Reconnect all SRS components. Using scan tool, check for DTCs. If DTC 69 is
retrieved, go to step 1 . If DTC 69 is not retrieved, system is normal at this
time. Intermittent condition may exist.
DTC 71: PASSENGER SIDE IMPACT AIR BAG MODULE SHORT CIRCUIT 1. Before
proceedin
g, see AIR BAG SAFETY PRECAUTIONS
. If DTC 34 is

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

retrieved, go to next step. If DTC 34 is not retrieved, go to step 3 .
2. Inspect ECU SRS connector C-25. See SRS ELECTRONIC CONTROL UNIT (SRS ECU)
under REMOVAL & INSTALLATION. See Fig. 19
. If
connector is not connected properly, connect properly and go to step 7 . If
connector is connected properly, go to next step.
3. Disconnect negative battery cable. Disconnect SRS ECU connector C-25 and
passenger side impact air bag module connector D-31. See SIDE IMPACT
AIR BAG MODULE
under REMOVAL & INSTALLATION. Reconnect
both connectors. Connect negative battery cable. Using scan tool, erase then
retrieve DTCs. If DTC 71 is retrieved, go to next step. If DTC 71 is not
retrieved, system is normal at this time.
4. Disconnect passenger side impact air bag module connector D-31. Connect
Load Resistor (MB991865) to Load Resistor Harness (MB991866). Connect
Load Resistor Harness to connector D-31 by backprobing connector. Connect
negative battery cable. Using scan tool, erase then retrieve DTCs. If DTC 71 is
retrieved, go to next step. If DTC 71 is not retrieved, replace passenger side
impact air bag module. Go to step 7 .
5. Disconnect SRS ECU connector C-25 and passenger side impact air bag
module connector D-31. Insert a cable tie or similar insulator between terminal
No. 23 (Yellow/Black wire) and No. 24 (Yellow wire) of SRS ECU connector
to release shorting bar. See Fig. 21
. Check for continuity between terminal No.
23 and 24. If continuity exists between terminals, replace wire harness between
SRS ECU and passenger side impact air bag module. Go to next step. If
continuity does not exist, erase, then retrieve DTCs. If DTC 71 is retrieved,
replace SRS ECU. Go to step 7 .
6. Check continuity of Yellow/Black wire between SRS ECU connector C-25,
terminal No. 23 and passenger side impact air bag module connector D-31,
terminal No. 1. See Fig. 28
. Check continuity of Yellow wire between SRS
ECU connector C-25, terminal No. 24 and passenger side impact air bag
module connector D-31, terminal No. 2. If continuity exists in both wires, go to
next step. If continuity does not exist in both wires, replace wire harness
between SRS ECU and passenger side impact air bag module. Go to next step.
7. Reconnect all SRS components. Activate air bag system. Using scan tool, erase
then retrieve DTCs. If DTC 71 is retrieved,
go to ste
p 1 . If DTC 71 is not

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