ignition MITSUBISHI MONTERO 2000 Service Repair Manual

ABS <4WD> -Troubleshooting35B-25
Termi-
nal
No.Normal condition Inspection conditions Check item
37ABS valve relay outputIgnition
switch: ONWhen system abnormality is
detected and relay is offSystem voltage
When relay is on approx. 1
second after engine starts2 V or less
39Brake warning lamp outputIgnitionWhen lamp is switched off2 V or less
switch: ONWhen lamp is illuminatedSystem voltage
40Control solenoid valve OUT (RL)Ignition switch: ONSystem voltage
41Control solenoid valve OUT(FR)Ignition switch: ONSystem voltage
46Center differential lock switch
input Ignition
switch: ONTransfer selector lever position:
2H, 4HSystem voltage
Transfer selector lever position:
4HLc, 4LLc2 V or less
4WD detection switch input
Ignition
switch: ONTransfer selector lever position:
2HSystem voltage
Transfer selector lever position:
4H2 V or less
47Diagnosis select inputWhen the MUT-IIis connected1 V or less
When the MUT-IIis not connectedApprox. 12 V
48Valve relay monitorIgnition switch: ONSystem voltage
50ABS warning lamp outputIgnitionWhen lamp is switched offSystem voltage
switch: ONWhen lamp is illuminated2 V or less
51Control solenoid valve IN (RL)Ignition switch: ONSystem voltage
52Control solenoid valve IN (FR)Ignition switch: ONSystem voltage


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EXTERIOR -Outside Mirror51-2
Inspection Procedure 1
Both of the electric retractable mirrors do not work at all.
Probable cause
The Mirror control unit controls the electric retractable mirror based on input
signals from the following switches.
DIgnition switch (ACC)
DRemote control mirror switch (for retracting and returning the mirror)
If the electric retractable mirror does not operate normally, one of the above
input circuit systems, the mirror assembly, or the Mirror control unit may be
defective.DRemote control mirror switch fault
DMirror assembly fault
DMirror control unit fault
DHarness or connector fault
NG
Repair
NG
Check the harness between the Mirror control unit and the
battery, and repair if necessary.
OK
To the next page
OK
Check the trouble
symptoms.
OK
OK
Check the mirror assembly (retraction operation) (Refer to
51 - 4).NG
Replace
Check the remote control mirror switch (Refer to 51-4).NG
Replace
OK
NG
OKNG
Repair
Check the harness wire, and repair if necessary.
DBetween the Mirror control unit and earth
NG
Check the trouble
symptoms.
NG
OK
NG
Check the harness wire, and repair if necessary.
DBetween the Mirror control unit and Remote controlled
mirror switch
NG
Repair OK
Measure at the Mirror control unit connector D-147.
DDisconnect the connector and test on the harness side.
DContinuity between terminal 3 and body earth
OK :Continuity
Check the trouble
symptoms. (1) NG
Measure at the Mirror control unit connector D-147 and
Remote controlled mirror switch connector D-142
DContinuity between the following terminals:
Between terminals 4 (Mirror control unit side) and 4
(Remote controlled mirror switch side)
OK :Continuity
Check the harness between the Mirror control unit and the
battery, and repair if necessary.
Check the trouble
symptoms.
NG
OKNG
Repair
Measure at the Mirror control unit connector D-147.
DDisconnect the connector and test on the harness side.
DIgnition switch (ACC)
(1) Voltage between terminal 5 and the body earth.
OK :Battery voltage
(2) Continuity between terminal 6 and the body earth.
OK :Continuity confirmed.(2) NGCheck the following connectors:D-147, D-209 (RHD),
D-223, D-27, D - 31 (LHD)
Check the following connectors:D-147, D-142
Check the following connectors:D-147, D-30 (LHD)
Check the following connectors:D-147, D-31, D-27, D-223,
D-208,


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EXTERIOR -Outside Mirror51-3
OK
Replace Mirror control unit.
OK
From the previous page
NGMeasure at the Remote controlled mirror switch connector
D-142
DDisconnect the connector and test on the harness side.
DContinuity between terminal 1 and body earth
OK :Continuity
NG
Repair
Check the harness wire, and repair if necessary.
DBetween the Remote controlled mirror switch and earth
NG
OK
Check the trouble
symptoms.
Check the following connectors:D-142, D-30
Inspection Procedure 2
Either of the electric retractable mirrors does not work.
Probable cause
The Mirror control unit controls the electric retractable mirror based on input
signals from the following switches.
DIgnition switch (ACC)
DRemote control mirror switch (for retracting and returning the mirror)
If the electric retractable mirror does not operate normally, one of the above
input circuit systems, the mirror assembly, or the Mirror control unit may be
defective.DMirror assembly fault
DMirror control unit fault
DHarness or connector fault
OK
Check the mirror assembly (retraction operation) (Refer to
51 - 4).NG
Replace
NG
OK
NG
Check the harness wire, and repair if necessary.
DBetween the Mirror control unit and Remote controlled
mirror
NG
RepairCheck the trouble
symptoms.
OK
Replace Mirror control unit.
Measure at the mirror control unit connector D-147 and remote
controlled mirror connector H-07(LH) or H - 13(RH).
DContinuity between the following terminals:
Between terminals 1 (Mirror control unit side) and 2
(Remote controlled mirror side)
Between terminals 2 (Mirror control unit side) and 1
(Remote controlled mirror side)
OK :ContinuityCheck the following connectors:D-147, D-15, D-25


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SRS -Troubleshooting52B-8
Code No.Reference
page Diagnosis item
43*1SRS warning lamp drive circuit systemLamp does not illuminate.52B-14
Lamp does not go out off.52B-14
44*1SRS warning lamp drive circuit system52B-14
45Internal circuit system of non-volatile memory (EEPROM) inside SRS-ECU52B-9
51, 52Driver’s air bag module (squib) system52B-9
54, 55Passenger’s air bag module (squib) system52B-9
71*2,72*2, 75, 76Side air bag module (R.H.) (squib) system52B-15
73, 74Side air bag module (R.H.) (squib) system52B-9
79, 93Side impact sensor (L.H.) communication system52B-16
81*2,82*2, 85, 86Side air bag module (L.H.) (squib) system52B-16
83, 84Side air bag module (L.H.) (squib ignition drive circuit) system52B-9
89, 96Side impact sensor (R.H.) communication system52B-17
91*1Side impact sensor (L.H.) power supply circuit system52B-17
92Analog G-sensor system inside side impact sensor52B-17
94*1Side impact sensor (R.H.) power supply circuit52B-18
95Analog G-sensor system inside side impact sensor (R.H.)52B-17
NOTE
1. *1: If the trouble(s) are extinguished, the SRS warning lamp will go out with diagnosis code history
automatically erased.
2. *2: If the vehicle condition return to normal, the diagnosis code will be automatically erased, and
the SRS warning lamp will return to normal.
3. If the vehicle has a discharged battery, it will store the fault codes 41 or 42. When these diagnosis
codes are displayed, check the battery.
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No.11, 12 or 13 Front impact sensor systemProbable cause
These diagnosis codes are output if there is abnormal resistance between the
input terminals of the front impact sensors inside the SRS-ECU.
The trouble causes for each diagnosis code No. are as follow.DMalfunction of harness or connector
DMalfunction of front impact sensor
DMalfunction of SRS-ECU
Table 1
Code No.Trouble Symptom
11D
Short circuit in front impact sensor or harness
D
Short circuit in front impact sensor harness leading to the vehicle body ground
D
Short circuit in front impact sensor harness leading to the power supply
12D
Open circuit in either left or right front impact sensor or harness
D
Short circuit in front impact sensor harness leading to the power supply
13D
Open circuit in both left and right front impact sensor or harness
D
Short circuit in front impact sensor harness leading to the power supply


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SRS -Troubleshooting52B-9
OK
Check the trouble symptoms.
NG
Repair
OK
Replace the SRS-ECU.
Measure at SRS-ECU connector E-111.
DDisconnect the connector and measure at the harness
side.
DResistances between terminal 1 and 2, 3 and 4
NG:2
Wor less (short circuit)
NG:1M
Wor more (open circuit)
DContinuity between 1, 2, 3, 4 and body earth
OK: No continuityNGCheck the following connector:A-31, A-25, D-27, E-111
NG
Check the harness wire between the front impact sensor and
the SRS-ECU, and repair if necessary.
OK
Check the front impact sensor (Refer to P.52B-21.)
Code No.14, 15, 16, 17, 31, 32, 45, 51, 52, 54, 55, 73, 74, 83,
84 System inside SRS-ECUProbable cause
These diagnosis trouble codes are output when a fault is detected in the
SRS-ECU.
The trouble causes for each diagnosis code No. are as follows.Malfunction of SRS-ECU
Table 2
Code No.Defective partTrouble Symptom
14Front impact analog G-sensorD
When the analog G-sensor is not operating
D
When the characteristics of the analog G-sensor are
abnormal
D
When the output from the analog G-sensor is abnormal
15Front impact safing G-sensorShort circuit in the safing G-sensor
16Open circuit in the safing G-sensor
17Side impact safing G-sensorD
When the safing G-sensor is not operating
D
When the characteristics of the safing G-sensor are abnormal
D
When the output from the safing G-sensor is abnormal
31DC-DC converterVoltage at the DC-DC converter terminal is higher than the
specified value for five seconds or more.
32Voltage at the DC-DC converter terminal is lower than the
specified value for five seconds or more(this is not detected if
diagnosis code No.41 or 42 indicating battery voltage drop has
been output.)
45Non - volatile memory (EEPROM)When the non-volatile memory (EEPROM) is abnormal
51Driver’s side air bag moduleShort circuit in the squib ignition drive circuit
52(squib)Open circuit in the squib ignition drive circuit
54Passenger’s air bag moduleShort circuit in the squib ignition drive circuit
55(squib)Open circuit in the squib ignition drive circuit
73Side air bag module (R.H.) (squib)Short circuit in the squib ignition drive circuit
74Open circuit in the squib ignition drive circuit
83Side air bag module (L.H.) (squib)Short circuit in the squib ignition drive circuit
84Open circuit in the squib ignition drive circuit
Replace the SRS-ECU.


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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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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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SRS -Post-collision Diagnosis52B-23
POST-COLLISION DIAGNOSIS
Whether or not the air bags have deployed, check and service
the vehicle after collision as follows:
SRS-ECU MEMORY CHECK
1. Connect the MUT-
IIto the diagnosis connector. (Refer
to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.)
Caution
Refer to that the ignition switch is LOCK(OFF) when
connecting or disconnecting MUT-II
.
2. Read (and write down) all displayed diagnosis codes.
(Refer to P.52B-7.)
NOTE
If battery power supply has been shut down by the
collision, the MUT-
IIcannot communicate with the
SRS-ECU. Check and, repair if necessary, the instrument
panel wiring harness before the next job.
3. Use the the MUT-
IIto read the data list (how long trouble(s)
have continued and how often memory have been
erased).
Data list
NoService Data ItemApplicability
92Number indication how often the memory is cleared.Maximum time to be stored: 250
93How long problem have lasted (How long it takes
from the occurrence of the problem till the first air bag
squib igniting signal)Maximum time to be stored: 9999 minutes
(approximately 7 days)
94How long problem(s) have lasted (How long it takes
from the first air bag squib igniting signal till now.)
4. Erase the diagnosis codes and after waiting 5 seconds
or more read (and write down) all displayed diagnosis
codes. (Refer to P.52B-7.)
REPAIR PROCEDURE
DEPLOYED DRIVER’S AND FRONT PASSENGER’S AIR
BAGS
1. Replace the following parts with new ones.
DSRS-ECU (Refer to P.52B-30.)
DDriver’s air bag module (Refer to P.52B-32.)
DFront passenger’s air bag module (Refer to P.52B-32.)
2. Check the following parts and replace if malfunction is
found:
DClock spring (Refer to P.52B-32.)
DSteering wheel, steering column and intermediate
joint
(1) Check the wiring harness (built into steering
wheel) and connectors for damage, and terminals
for deformation.
(2) Check the driver’s air bag module for proper
installation to the steering wheel.


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