1998 MITSUBISHI MONTERO battery

INCH Lbs. (N.m)
Air Bag Module Bolt/Nut
Driver-Side ........................................ ( 1)
Passenger-Side ..................................... ( 1)
Clockspring Screw .................................... ( 1)
SRS-ECU (Air Bag Control Unit) Bolt ............. 43 (4.9)
( 1) - Information is not available from manufacturer.









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DIAGNOSIS & TESTING
INITIAL SRS DIAGNOSTIC PROCEDURE
WARNING: Follow air bag service precautions to prevent accidental air
bag deployment and personal injury. See SERVICE PRECAUTIONS.
NOTE: Ensure battery is fully charged. If battery voltage is too
low, SRS warning light will come on. When battery voltage is
restored to normal, light will go out. Codes remain stored
for no more than about 7 days. Codes can be stored no more
than 250 times. After servicing, reconnect negative battery
cable. Erase codes using Multi-Use Tester II (MUT-II,
MB991502). Check SRS warning light to verify system
operation. See SYSTEM OPERATION CHECK.
CAUTION: Ensure ignition is off before connecting or disconnecting
scan tool at DLC.
1) Before proceeding, follow service precautions. See
SERVICE PRECAUTIONS . Turn ignition on. If SRS warning light comes on
for about 7 seconds and turns off, SRS is functioning properly at this
time.
2) If SRS warning light does not come on, or comes on and
stays on, turn ignition switch to LOCK position. Connect scan tool to
Data Link Connector (DLC). See Fig. 9. Turn ignition on. Use scan tool
to retrieve code(s).
Fig. 9: Connecting Scan Tool To Data Link Connector (DLC)
Courtesy of Mitsubishi Motor Sales of America.
TROUBLE SYMPTOMS TABLE









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Symptom Inspection Procedure
Communication With All Systems Not Possible ............ 1
Communication With SRS Only Not Possible ............... 2
Ignition Switch On (Engine Stopped)
SRS Warning Light Does Not Come On ............... DTC 43
SRS Warning Light Stays On After 7 Seconds ...... DTC 43









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INSPECTION PROCEDURE 1
The cause is probably in power supply system (including
ground circuit of diagnostic line). Check connectors and harness, and
repair if necessary.
INSPECTION PROCEDURE 2
NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Measure SRS Check Harness (MB991613) connector No. 5.
Disconnect SRS-ECU connector C-122 and connect SRS check harness
connector No. 3 to C-122. Check continuity between terminal No. 20, 21
and ground. If there is no continuity, go to next step. If there is
continuity, go to step 4).
3) Check connector C-122, and repair if necessary. If
connector is okay, check for trouble symptoms. If fault exists, check
harness between SRS-ECU and ground, and repair if necessary.
4) Measure SRS check harness connector No. 5. Disconnect SRS-
ECU connector C-122 and connect SRS harness check connector No. 3 to
C-122. Connect negative battery cable. Measure voltage between
terminal No. 13 and 14, and body ground. If voltage at terminals is 9
volts or more, check harness wire between SRS-ECU and Data Link
Connector (DLC), and repair if necessary. If harness wire is okay,
replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL &
INSTALLATION. If voltage is not as specified, check connector C-80, C-
93, C-101, and C-132, and repair if necessary. If connectors are okay,
check for trouble symptoms. If fault exists, check harness between
SRS-ECU and IG1 A or B (ignition switch), and repair if necessary.
Fig. 10: Identifying SRS Check Harness (MB991613) Connectors
Courtesy of Mitsubishi Motor Sales of America.
DTC 11, 12 & 13: FRONT IMPACT SENSOR SYSTEM

NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Check front impact sensor, and replace if necessary. See
FRONT IMPACT SENSORS under REMOVAL & INSTALLATION. Measure SRS Check
Harness (MB991613) connector No. 5. Disconnect SRS-ECU connector C-122\
and connect SRS check harness connector No. 3 to C-122. Measure
resistance between terminals for normal value of 1,900-2,100 ohms. If
resistance is not as specified, go to next step. If resistance is as
specified, check for trouble symptoms. If fault exists, replace SRS-
ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
3) Check connector A-71, A-75, C-113, and C-122, and repair
if necessary. If connectors are okay, check for trouble symptoms. If
fault exists, inspect harness between SRS-ECU and front impact sensor,
and replace harness if necessary.
DTC 14: ANALOG "G" SENSOR SYSTEM
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 15 & 16: SAFING "G" SENSOR SYSTEM
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 21, 22 & 61: DRIVER-SIDE AIR BAG MODULE (SQUIB) SYSTEM
WARNING: During the following procedure, never measure circuit
resistance of air bag module (squib), even when using
specified DVOM. If circuit resistance is measured, it may
cause accidental air bag deployment and personal injury.
NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Perform clockspring test, and repair as necessary. See
CLOCKSPRING TEST under COMPONENT TESTING. Disconnect clockspring
connector C-129. Connect SRS Check Harness (MB991613) connector No. 1
to clockspring connector. Connect negative battery cable. Erase DTC
memory and check if DTCs 21, 22, or 61 are set. If any of these DTCs
are output, go to next step. If DTCs are not output, go to step 4).
3) Check SRS-ECU connector C-122 and clockspring connector C-
129, and repair as necessary. If connectors are okay, check for
trouble symptoms. If fault exists, check harness between SRS-ECU and
clockspring. Disconnect connector C-122 and C-129. Connect SRS Check
Harness connector No. 1 to C-129 and No. 3 to C-122. Check resistance
between terminals No. 5 and 6. If resistance is approximately 3 ohms,
replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL &
INSTALLATION. If resistance is not as specified, repair as necessary.
4) Check connector C-129 and 1 (air bag module connector),
and repair if necessary. If connectors are okay, check trouble
symptoms. If fault exists, replace driver-side air bag module. See
DRIVER-SIDE AIR BAG MODULE under REMOVAL & INSTALLATION.
DTC 24, 25 & 64: PASSENGER-SIDE AIR BAG MODULE (SQUIB) SYSTEM
WARNING: During the following procedure, never measure circuit
resistance of air bag module (squib), even when using
specified DVOM. If circuit resistance is measured, it may

cause accidental air bag deployment and personal injury.
NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Disconnect passenger-side air bag connector C-107. Connect
SRS Check Harness (MB991613) connector No. 1 to passenger-side air bag\
connector. Erase DTC memory and check if DTCs 24, 25, or 64 are set.
If any of these DTCs are output, go to next step. If DTCs are not
output, replace passenger-side air bag module. See
PASSENGER-SIDE AIR BAG MODULE under REMOVAL & INSTALLATION.
3) Check connectors C-107 and C-122, and repair if necessary.
If connectors are okay, check trouble symptoms. If fault is still
present, check harness wire between passenger-side air bag module and
SRS-ECU, and repair if necessary. If harness wire is okay, replace
SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL &
INSTALLATION.
DTC 31 & 32: SRS-ECU CAPACITOR SYSTEM
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 34: CONNECTOR LOCK SYSTEM
NOTE: If vehicle condition returns to normal, DTC will be erased
and SRS warning light will return to normal.
NOTE: Refer to WIRING DIAGRAMS for connector identification.
Before proceeding, see SERVICE PRECAUTIONS. Check connector
C-122 and repair if necessary. If connector is okay, check for trouble
symptom. If fault exists, replace SRS-ECU. See
SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 35: SRS-ECU SYSTEM (AFTER AIR BAG DEPLOYMENT)
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 41: IG1 (A) POWER CIRCUIT SYSTEM
NOTE: If vehicle condition returns to normal, DTC will be erased
and SRS warning light will return to normal.
NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Measure SRS Check Harness (MB991613) connector No. 5.
Disconnect SRS-ECU connector C-122 and connect SRS check harness
connector No. 3 to C-122. Check terminal No. 20 and 21 for continuity
to ground. If there is no continuity, go to next step. If there is
continuity, go to step 4).
3) Check connector C-122 and repair if necessary. If
connector is okay, check for trouble symptom. If fault exists, check
harness wire between SRS-ECU and ground, and repair if necessary.
4) Measure SRS check harness connector No. 5. Disconnect SRS-
ECU connector C-122 and connect SRS harness check connector No. 3 to
C-122. Connect negative battery cable and turn ignition switch to ON
position. If voltage between terminal No. 14 and body ground is 9

volts or more, replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU)
under REMOVAL & INSTALLATION. If voltage is not as specified, check
connector C-93, C-101, and C-132, and repair if necessary. If
connectors are okay, check for trouble symptoms. If fault still
exists, check harness wire between SRS-ECU and ignition switch IG1
(A), and repair if necessary.
DTC 42: IG1 (B) POWER CIRCUIT SYSTEM
NOTE: If vehicle condition returns to normal, DTC will be erased
and SRS warning light will return to normal.
NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Measure SRS Check Harness (MB991613) connector No. 5.
Disconnect SRS-ECU connector C-122 and connect SRS check harness
connector No. 3 to C-122. Check terminal No. 20 and 21 for continuity
to ground. If there is no continuity, go to next step. If there is
continuity, go to step 4).
3) Check connector C-122 and repair if necessary. If
connector is okay, check for trouble symptoms. If fault still exists,
check harness wire between SRS-ECU and ground, and repair if
necessary.
4) Measure SRS check harness connector No. 5. Disconnect SRS-
ECU connector C-122 and connect SRS harness check connector No. 3 to
C-122. Connect negative battery cable and turn ignition switch to ON
position. If voltage between terminal No. 13 and body ground is 9
volts or more, replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU)
under REMOVAL & INSTALLATION. If voltage is not as specified, check
connector C-80, C-93, and C-101, and repair if necessary. If
connectors are okay, check for trouble symptoms. If fault still
exists, check harness wire between SRS-ECU and ignition switch IG1
(B), and repair if necessary.
DTC 43: SRS WARNING LIGHT CIRCUIT
NOTE: Refer to WIRING DIAGRAMS for connector identification.
Light Does Not Come On
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Measure SRS Check Harness (MB991613) connector No. 5.
Disconnect SRS-ECU connector C-122 and connect SRS check harness
connector No. 3 to C-122. Check terminal No. 20 and 21 for continuity
to ground. If there is no continuity, go to next step. If there is
continuity, go to step 4).
3) Check connector C-122 and repair if necessary. If
connector is okay, check for trouble symptoms. If fault still exists,
check harness wire between SRS-ECU and ground, and repair if
necessary.
4) Measure SRS check harness connector No. 5. Disconnect SRS-
ECU connector C-122 and connect SRS harness check connector No. 3 to
C-122. Connect negative battery cable and turn ignition switch to ON
position. Connect terminal No. 15 to body ground. If SRS warning light
comes on, replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU) under
REMOVAL & INSTALLATION. If SRS warning light does not come on, inspect
for blown bulb and repair if necessary. If bulb is okay, check
connector C-04, C-11, C-96, and C-101, and repair if necessary. If
connectors are okay, check for trouble symptoms. If fault still
exists, check harness wire between SRS-ECU and ignition switch IG1,
and repair if necessary. If harness wire is okay, replace combination

meter.
Light Does Not Turn Off
1) Before proceeding, see SERVICE PRECAUTIONS. Connect
negative battery cable and turn ignition switch to ON position. If SRS
warning light stays on when C-122 is disconnected, go to next step. If
SRS warning light turns off when C-122 is disconnected, replace SRS-
ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
2) Check connector C-122, and repair if necessary. If
connector is okay, check trouble symptoms. If fault still exists,
check wire harness between SRS-ECU and combination meter, and repair
if necessary.
DTC 44: SRS WARNING LIGHT DRIVE CIRCUIT SYSTEM
NOTE: If vehicle condition returns to normal, DTC will be erased
and SRS warning light will return to normal.
Before proceeding, see SERVICE PRECAUTIONS. Check SRS warning
light drive circuit system. If warning light drive system is okay,
replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL &
INSTALLATION. Check for DTCs. See SYSTEM OPERATION CHECK.
DTC 45: SRS-ECU EEPROM & A/D CONVERTER SYSTEM
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 51 & 52: DRIVER-SIDE AIR BAG MODULE (SQUIB IGNITION
DRIVE CIRCUIT) SYSTEM
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
DTC 54 & 55: PASSENGER-SIDE AIR BAG MODULE (SQUIB
IGNITION DRIVE CIRCUIT) SYSTEM
Before proceeding, see SERVICE PRECAUTIONS. Replace SRS-ECU.
See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL & INSTALLATION.
COMPONENT TESTING
CLOCKSPRING TEST
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
system. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Remove driver-side air bag module and clockspring. See
DRIVER-SIDE AIR BAG MODULE & CLOCKSPRING under REMOVAL & INSTALLATION.
Check connectors, protective tubing, and case for damage, and
terminals for deformities. Check for continuity between No. 1
connector of clockspring and connectors No. 3 and 4. See Figs. 12 and
13.
3) Align paint mark of SRS Check Harness (MB991613) connecto\
r
No. 4 with notch in clockspring connector No. 2 and connect. See
Fig. 14 . Check continuity between terminals No. 22 and 23 of SRS check
harness connector No. 5. See Fig. 13.
4) Replace clockspring if any damage was found or continuity
does not exist between specified terminals. See
DRIVER-SIDE AIR BAG MODULE & CLOCKSPRING under REMOVAL & INSTALLATION.

1) Inspect ABS relay box. See Fig. 3. Replace ABS relay box
if needed. If ABS relay box is okay, go to next step.
2) Disconnect ECU 22-pin connector and ABS relay box 8-pin
connector. Turn ignition on. Using a DVOM, check voltage between ABS
relay box 8-pin harness connector terminal No. 5 and ground. See
Fig. 4 . If battery voltage does not exist, go to next step. If battery
voltage exists, check and repair connectors and related wiring harness
between ABS valve relay and ground. See WIRING DIAGRAMS.
3) Check and repair connectors and related wiring harness
between instrument cluster and ABS valve relay. See WIRING DIAGRAMS.
Fig. 4: Identifying ABS Relay Box Connector Terminals
Courtesy of Mitsubishi Motor Sales of America.
Ignition Switch In ON Position, ANTI-LOCK Warning Light
Blinks Twice. In START Position, Light Stays On. When
Ignition Switch Is Cycled From START To ON Position, Light
Blinks Once
1) Disconnect ABS relay box connectors. See Fig. 3.
Disconnect ECU 22-pin connector. Turn ignition on. Check voltage
between ECU connector terminal No. 50 and ground. See Figs. 5-6. If
battery voltage is not present, check and repair connectors and
related wiring harness between instrument cluster and ECU. See
WIRING DIAGRAMS . If battery voltage is present, go to next step.
2) Check and repair ECU 22-pin connector. If connector is
okay, replace ECU.

Fig. 8: Identifying Data Link Connector Terminals
Courtesy of Mitsubishi Motor Sales of America.
CLEARING DTCs
To clear DTCs using scan tool, follow scan tool
manufacturer's instructions. To clear DTCs without scan tool,
disconnect negative battery cable for at least 10 seconds. Reconnect
battery cable and repeat RETRIEVING DTCs to confirm that malfunction
has been corrected.
DTC DEFINITION









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DTC ( 1) System Affected
11 ..................... Right Front Wheel Speed Sensor (Open/Short)\
12 ...................... Left Front Wheel Speed Sensor (Open/Short)\
13 ...................... Right Rear Wheel Speed Sensor (Open/Short)\
14 ....................... Left Rear Wheel Speed Sensor (Open/Short)\
15 ..................... Wheel Speed Sensor Output Signal (Abnormal)\
16 ................................................ ECU Power Supply
21 ....................... Right Front Wheel Speed Sensor (Abnormal)\
22 .............................. Left Front Wheel Sensor (Abnormal)\
23 ........................ Right Rear Wheel Speed Sensor (Abnormal)\
24 ......................... Left Rear Wheel Speed Sensor (Abnormal)\
25 ........................................ Free Wheel Engage Switch
26 ....................... Center Differential Lock Detection Switch
27 ..................... ( 2) Rear Differential Lock Detection Switch