2000 MITSUBISHI MONTERO Service Repair Manual

SRS -Troubleshooting52B-13
Code No.34 Connector lock systemProbable cause
This diagnosis code is output when the SRS-ECU detects that the SRS-ECU
connector is improperly connected. However, when vehicle condition returns to
normal, this code will be automatically erased, and the SRS warninglampwill go
out.DMalfunction of connector
DMalfunction of SRS-ECU
NG YES
Are SRS-ECU connectors E-111, E-110 bags> connected properly.Check the following connectors: E-111,E-110 side air bags>
Repair
Replace the SRS-ECU.
RepairNOOK
Code No.35 SRS-ECU (deployed air bag) systemProbable cause
This code is displayed after deployment of air bags. If displayed before
deployment, the code indicates malfunction probably present in SRS-ECU.Malfunction of SRS-ECU
Replace the SRS-ECU.
Code No.41 Power circuit system (fuse No.6 circuit)
Code No.42 Power circuit system (fuse No.8 circuit)Probable cause
Code No.41 is displayed if voltage between IG1terminal (SRS-ECU, terminal 16)
and earth is lower than specified for fivesuccessive seconds ormore.
Code No.42 is displayed if voltage between IG
1terminal (SRS-ECU, terminal 13)
and earth is lower than specified for fivesuccessive seconds ormore.
However, when vehicle condition returns to normal, these codes will be
automatically erased, and the SRS warning lampwill go out. If codes No.41 and
42 are displayed together, check the battery first as vehicle may have
discharged battery.
DMalfunction of harness or connector
DMalfunction of SRS-ECU
NGOK
NG NG
OK
Replace the SRS-ECU.
Measure at SRS-ECU connector E-111.
DDisconnect the connector and measure at the harness
side.
DConnect the negative ( - ) battery terminal.
DIgnition switch: ON
DVoltage between terminal 16 and body earth (in case of
code No. 41)
OK: 9 V or more
DVoltage between terminal 13 and body earth (code No.42)
OK: 9 V or moreCheck the following connectors:D-208, D-209, D-210, E-111
Check the trouble symptoms.Repair
Check the harness wire between the SRS-ECU and the
ignition switch IG
1, and repair if necessary.


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SRS -Troubleshooting52B-14
Code No.43 SRS warning lamp drive circuit system (Lamp
does not come on.)Probable cause
This diagnosis code is output when aopencircuit is present for5 successive
seconds or more in SRS warninglampdrive circuit. However, the vehicle
condition return to normal condition, this code, if displayed due toopencircuit,
will be automatically erased.DMalfunction of harness or connector
DBlownbulb
DMalfunction of SRS-ECU
DMalfunction of combination meter
NGOK
NG
NGOK
Check the trouble
symptoms.
NG
Repair
Check the harness wires between the SRS-ECU, the
combination meter and the ignition switch IG
1.
OK
Replace the SRS-ECU.
Repair
Repair
OK
Check the following connectors:
L.H. drive vehicles: D-210, D-01, D-02, E-111
R.H. drive vehicles: D-213, D-01, D-02, E-111
SRS warning lampcheck
DConnect the negative ( - ) battery terminal.
DIgnition switch: ON
DDoeslampcome on when SRS-ECU connector E-111 is
disconnected?
OK: Lamp illuminatesNGCheck a burnt-out bulb.
Replace the combina-
tion meter.
Code No.43 SRS warning lamp drive circuit system (Lamp
does not go out.)Probable cause
This diagnosis code is output when a short to earth occurs in the harness
between the SRS warning lamp and theSRS-ECU. However, the vehicle
condition returns to normal condition, this code will be automatically erased, and
SRS warning lampwill go out.DMalfunction of harness or connector
DMalfunction of SRS-ECU
DMalfunction of combination meter
OKNG
NG
RepairNG
NO
Replace the combination meter.
SRS warning lampcheck
DConnect the negative ( - ) battery
terminal.
DIgnition switch: ON
DDoes thelamp go outwhen
combination meter connector
D-02 is disconnected?YESCheck the following connectors:
D-02, E-111Repair
Check the trouble symptoms.
OK
Replace the SRS-ECU.
Check the harness wires between
the SRS-ECU and the combination
meter.
Code No.44 SRS warning lamp drive circuit systemProbable cause
This diagnosis code is output when a short occurs in thelampdrive circuit or a
malfunction of the output transistor inside the SRS-ECU is detected while the
SRS-ECU is monitoring the SRS warninglampdrive circuit.
However, when vehicle condition returns to normal, these codes will be
automatically erased, and the SRS warning lampwill go out.DMalfunction of harness or connector
DMalfunction of SRS-ECU
Check the SRS warninglampdrive circuit system.
(Refer to P.52B-14.)OKReplace the SRS-ECU.


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P
ro bab le cau se T
ro uble Sym pto m 7
1 S
hort in sid e air bag module (R .H .) (s q uib ) or harn ess sh ort 7
2 7
5 S
hort in sid e air bag module (R .H .) (s q uib ) harn ess le adin g to th e pow er su pply 7
6 S
hort in sid e air bag module (R .H .) (s q uib ) harn ess le adin g to th e earth C
heck th e tr o uble sym pto m s. N
G C
heck wir in g harn ess betw een th e sid e air bag module (R .H .)
( s q uib ) and SR S-E C U. N
G
R ep air R
epla ce th e SR S-E C U. N
G
R ep air
N O R
epla ce th e driv e r’s fr o nt se at back asse m bly .
M UT-II Self -D ia g Code
D D
is co nnect th e sid e air bag module (R .H .) co nnecto r F-2 8
a nd co nnect th e harn ess sid e co nnecto r to th e SR S
c h eck harn ess (M B991606 or M B991613) No.4 co nnecto r.
D C
onnect th e negativ e (- ) batte ry te rm in al.
D E
ra se dia gnosis co de mem ory .
A re co de No.7 1, 72, 75 or 76 dis p la ye d? S
R S ch eck harn ess
( M B991606 or M B991613)
R esis ta nce (3
W)
4 S
id e air bag wir in g
h arn ess
S id e air bag module
c o nnecto r (R .H .)

P
ro bab le cau se O
K C
heck th e tr o uble sym pto m s. N
G
R ep air R
epla ce th e SR S-E C U. Y
ES R
epla ce th e sid e im pact se nso r (L .H .) m ounte d driv e r’s sid e. N
G C
heck th e harn ess wir e betw een th e le ft sid e im pact se nso r
a nd th e SR S-E C U.
C ode No.8 1, 82, 85, 86 Sid e air bag module (L .H .) (s q uib )
s yste m P
ro bab le cau se T
ro uble Sym pto m 8
1 S
hort in sid e air bag module (L .H .) (s q uib ) or harn ess sh ort 8
2 8
5 S
hort in sid e air bag module (L .H .) (s q uib ) harn ess le adin g to th e pow er su pply harn ess 8
6 S
hort in sid e air bag module (L .H .) (s q uib ) harn ess le adin g to th e earth O
K C
heck th e tr o uble sym pto m s. N
G C
heck wir in g harn ess betw een sid e air bag module (L .H .)
( s q uib ) and SR S-E C U. N
G
R ep air R
epla ce th e SR S-E C U. N
G
R ep air
N O
M UT-II Self -D ia g Code
D D
is co nnect sid e air bag module co nnecto r (L .H .) F-2 1
a nd co nnect th e harn ess sid e co nnecto r to SR S ch eck
h arn ess (M B991606 or M B991613) co nnecto r No.4 .
D C
onnect th e negativ e (- ) batte ry te rm in al.
D E
ra se dia gnosis co de mem ory .
I s co de No.8 1, 82, 85 or 86 dis p la ye d? S
R S ch eck harn ess
( M B991606 or M B991613)
R esis ta nce (3
W)
4 S
id e air bag wir in g
h arn ess
S id e air bag module (L .H .)
c o nnecto r R
epla ce th e passe nger’s fr o nt se at back asse m bly

SRS -Troubleshooting52B-17
Code No.89, 96 Side impact sensor (R.H.) communication
systemProbable cause
These diagnosis codes are output if communication between the side impact
sensor (R.H.) and the SRS-ECU is not possible (code No.96) or abnormal (code
No.89).DMalfunction of harness or connector
DMalfunction of side impact sensor (R.H.)
DMalfunction of SRS-ECU
OK
Check the trouble symptoms.
NG
Repair
NG
RepairOK
Replace the SRS-ECU.
YES
Replace the side impact sensor (R.H.) mounted passenger’s
side.
MUT-II Self-Diag Code
DSwitch over the right side impact sensor (R.H.) and the
side impact sensor (L.H.).
DConnect the negative ( - ) battery terminal.
DErase diagnosis code memory.
Are code Nos.89 and 96 erased and code Nos.79 and 93
output?NOCheck the following connectors:F-01, E-20, E-110
NG
Check the harness wire between the side impact sensor
(R.H.) and SRS-ECU.
Code No.91 Side impact sensor (L.H.) power supply circuit
systemProbable cause
Power supply voltage of side impact sensor (L.H.) is lower than specified for five
successive seconds ormore.
However, when vehicle condition returns to normal, this code will be
automatically erased, and the SRS warning lampwill go out.DMalfunction of harness or connector
DMalfunction of side impact sensor (L.H.)
DMalfunction of SRS-ECU
Measure at side impact sensor connector F-19.
DDisconnect the connector and measure at the harness
side.
DConnect the negative ( - ) battery terminal.
DIgnition switch: ON
DVoltage between terminal 1 and body earth
OK: 9 V or moreNGCheck the following connectors:F-19, E-21, E-110
OK
Check the trouble symptoms.
NG
Repair
NG
Check the harness wire between the left side impact sensor
and the SRS-ECU.
NG
RepairOK
Replace the SRS-ECU.
OK
Replace side impact sensor (L.H.).
Code No.92, 95 Side impact sensor systemProbable cause
Code No.92 is displayed when malfunction is present inside side impact sensor
(L.H.).
Code No.95 is displayed when malfunction is present inside side impact sensor
(R.H.).
The trouble causes for each diagnosis code No. are as follows.DMalfunction of side impact sensor (L.H.)
(in case of code No.92)
DMalfunction of side impact sensor (R.H.)
(in case of code No.95)
Table 7
Code No.Defective partTrouble Symptom
92Side impact analog G-sensorD
Not working
95D
Having abnormal characteristics
D
Having abnormal output
DReplace the side impact sensor (L.H.) (in case of code No.92)
DReplace the side impact sensor (R.H.) (in case of code No.95)


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SRS -Troubleshooting52B-18
Code No.94 Side impact sensor (R.H) power supply circuit
systemProbable cause
Power supply voltage of side impact sensor (R.H.) is lower than specified for
consecutive five seconds or more.
However, when vehicle condition returns to normal, this code will be
automatically erased, and the SRS warning lampwill go out.DMalfunction of harness or connector
DMalfunction of side impact sensor (R.H.)
DMalfunction of SRS-ECU
Measure at side impact sensor (R.H.) connector F-01.
DDisconnect the connector and measure at the harness
side.
DConnect the negative ( - ) battery terminal.
DIgnition switch: ON
DVoltage between terminal 1 and body earth
OK: 9 V or moreNGCheck the following connectors:F-01, E-20, E-110
OK
Check the trouble symptoms.
NG
Repair
NG
Check the harness wire between the side impact sensor
(R.H.) and SRS-ECU.
NG
RepairOK
Replace the SRS-ECU.
OK
Replace side impact sensor (R.H.).
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble SymptomInspection procedure No(s).Reference page
Communication with the MUT-II is not
possible.152B-18
SRS warning lamp does not come on.See diagnosis code No.43.52B-14
SRS warning lamp does not go out.See diagnosis code Nos.43, 44.52B-14
INSPECTION PROCEDURES FOR TROUBLE SYMPTOMS
Inspection procedure 1
Communication with the MUT-II is not possible.
Probable cause
If communication with all other systems is not possible, there is ahigh possibility
that there is a malfunction of the diagnosis line. When only communication with
SRS air bags is impossible,open in diagnosis outputcircuit or power supply
circuit including earth circuit may be present.DMalfunction of harness or connector
DMalfunction of SRS-ECU
NG
NG
NG
Check the harness wire between the SRS-ECU and the
ignition switch IG
1, and repair if necessary.
NOCheck the MUT-II diagnosis circuit, and repair if necessary.
OK
Check the trouble
symptoms.
NG
Repair
NG
Check the harness wire between SRS-ECU and earth, and
repair if necessary.
OK
Check the trouble
symptoms.
NG
RepairOK
OK
Check the trouble
symptoms.
Check the harness wire between SRS-ECU and diagnosis
connector.
OK
Replace the SRS-ECU.
YES
(1)NG
Check the following connector:E - 111
(2), (3)
NG
Check the following connectors:
D-208, D-209, D-210, E-111
Measure at SRS-ECU connector E-111.
DDisconnect the connector and measure at the harness
side.
(1) Continuity between terminal 7 and body earth
OK: Continuity
DConnect the negative ( - ) battery terminal.
DIgnition switch: ON
(2) Voltage between terminal 13 and body earth
OK:9 V or more
(3) Voltage between (16) and body earth
OK: 9 V or more
Repair
NG
Repair
Check the following connectors:D-23, D-33, E-111
Is communication between MUT-II and other system is
possible?


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S
R S MAIN TE N ANCE
T he SR S must b e in sp ecte d by an auth oriz e d deale r 10 ye ars
a fte r th e date of ve hic le re gis tr a tio n.
S R S WARNIN G LA M P CHEC K
T urn th e ig nit io n ke y to th e O N posit io n.D oes th e SR S warn in g
l a m p illu m in ate fo r about 7 se co nds, tu rn off and th en re m ain
e xtin guis h ed fo r at le ast 5 se co nds? If ye s, SR S syste m is
f u nctio nin g pro perly . If no, co nsu lt page 52B -7 .
S R S CO M PO NEN T VIS U AL CHEC K
T urn th e ig nit io n ke y to th e LO CK posit io n, dis co nnect th e
n egativ e batte ry ca ble and ta pe th e te rm in al.
C au tio n
W ait at le ast 60 seco nds afte r dis co nnectin g th e batte ry
c ab le befo re doin g an y fu rth er work . (R efe r to P.5 2B -4 .)
S R S CO NTR O L UNIT (S R S-E C U)
1 . Check SR S-E C U ca se and bra cke ts fo r dents , cra cks,
d efo rm atio n or ru st.
C au tio n
T he SR S may not activ ate if th e SR S-E C U is not
i n sta lle d pro perly , w hic h co uld re su lt in serio us in ju ry
o r death to th e veh ic le ’s driv er or fr o nt passen ger.
2 . Check co nnecto r fo r dam age, and te rm in als fo r
d efo rm atio n or ru st.
R epla ce SR S-E C U if it fa ils vis u al ch eck.
( R efe r to P.5 2B -3 0.)
F R O NT IM PA CT SEN SO RS
1 . Check th e headla m p su pport panel fo r defo rm atio n or
r u st.
2 . Check th e fr o nt im pact se nso r fo r dents , cra cks,
d efo rm atio n or ru st.
3 . Check th e se nso r harn esse s fo r bin din g, th e co nnecto rs
f o r dam age, and th e te rm in als fo r defo rm atio n. B
atte ry (- ) ca ble I
n su la tin g ta pe B
atte ry S
R S-E C U F
ro nt im pact se nso r H
eadla m psu pport p anel
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riv er’s sid e P
assen ger’s sid e C
onnecto r
I n fla to r C
onnecto r M
atin g mark
P
ro te ctiv e tu bes
C
ase
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