MITSUBISHI MONTERO 2000 Service Repair Manual

SWS -Troubleshooting54B-15
Trouble symptomInspection
procedureReference
page
Rear fog lampRear fog lamp do not illuminate when the rear fog lamp switch
is turned on.N-154B-40
Rear fog lamp do not go out when the headlamps and front fog
lamps are turned off while the rear fog lamp is on.N-254B-40
Room lampRoom lamp does not illuminate.O-154B-41
Room lamp dimming function does not work normally.O-254B-41
Center displayCenter display does not work normally.–GROUP 54A
– Center Dis-
play.
DEFECTS FOUND BY INPUT SIGNAL CHECK
If the input signal check finds a defect, follow the table below to check.
Trouble symptomInspection
procedureReference
page
Ignition switch (ACC) signal is not sent to the ETACS-ECU.P-154B-42
Ignition switch (IG1) signal is not sent to the ETACS-ECU.P-254B-42
Key reminder switch signal is not sent to the ETACS-ECU.P-354B-43
Hazard warning lamp switch signal is not sent to the ETACS-ECU.P-454B-43
Front fog lamp switch signal is not sent to the ETACS-ECU.P-554B-44
Rear fog lamp switch signal is not sent to the ETACS-ECU.P-654B-45
Back-up lamp switch signal is not sent to the ETACS-ECU.P-754B-45
Inhibitor switch (reverse) signal is not sent to the ETACS-ECU.P-854B-46
Rear wiper motor auto-stop signal is not sent to the ETACS-ECU.P-954B-46
Driver’s door switch signal is not sent to the ETACS-ECU.P-1054B-47
Door switches signal is not sent to the ETACS-ECU.
Front passenger’s or back door lock key cylinder switch signal is not sent to the
ETACS-ECU.P-1154B-48
Driver’s door lock actuator switch signal is not sent to the ETACS-ECU.P-1254B-48


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SWS -Troubleshooting54B-16
Trouble symptomInspection
procedureReference
page
Column switchTail lamp switch signal is not sent to the ETACS-ECU.P-1354B-49
Headlamp switch signal is not sent to the ETACS-ECU.
Dimmer switch signal is not sent to the ETACS-ECU.
Passing switch signal is not sent to the ETACS-ECU.
Turn-signal lamp switch signal is not sent to the ETACS-ECU.
Windshield mist wiper switch signal is not sent to the
ETACS-ECU.P-1454B-50
Windshield intermittent wiper switch signal is not sent to the
ETACS-ECU.
Windshield low-speed wiper switch signal is not sent to the
ETACS-ECU.
Windshield high-speed wiper switch signal is not sent to the
ETACS-ECU.
Windshield intermittent wiper interval adjusting knob signal is
not sent to the ETACS-ECU.P-1554B-50
Windshield washer switch signal is not sent to the
ETACS-ECU.P-1454B-50
Rear wiper switch signal is not sent to the ETACS-ECU.
Rear washer switch signal is not sent to the ETACS-ECU.
Headlamp washer switch signal is not sent to the ETACS-ECU.P-1354B-49
Power window
main switchAny switch signal is not sent to the ETACS-ECU.P-1654B-51
TransmitterAny switch signal is not sent to the ETACS-ECU.P-1754B-52
Sunroof switchAny switch signal is not sent to the ETACS-ECU.P-1854B-52
Center displayAny switch signal is not sent to the ETACS-ECU.P-1954B-53


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SWS -TroubleshootingSWS -Troubleshooting54B-17
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure A-1
Communication with the MUT-II
is impossible.Probable cause
The harness wires between the ETACS-ECU power supply line or the
ETACS-ECU and the diagnosis connector may be defective.DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
Ye s
Ye s
Check the ETACS-ECU battery circuit. (Refer to P.54B-53, Inspec-
tion Procedure Q-1.)
No
NG
NG
Repair
NG
Check the harness wire between ETACS-ECU and body earth.
OK
OK
Replace the ETACS-ECU.
NG
Repair
NG
Check the harness wire between ETACS-ECU and diagnosis con-
nector.NG
Repair
OK
Check trouble symptoms.
Check following connectors:
D-226, D-222, D-23
OK
Check trouble symptoms.
Check following connectors:
D-224, D-209Measure at ETACS-ECU connector D-224.
DDisconnect connector and measure at J/B side.
DContinuity between terminal 20 and body earth.
OK:Continuity
Is communication with the MUT-
IIpossible when the ignition
switch is at the ON position?
Can MUT-
IIcommunicate with other system?NoCheck and repair the self-diagnosis system with the MUT-
II.
Inspection Procedure B-1
Buzzer: Light reminder warning buzzer function does not
work normally.Probable cause
The ETACS-ECU operates the light reminder warning buzzer function, based on
input signals from the following switches:
DIgnition switch (IG1)
DDriver’s door switch
DTail lampswitch
DHeadlamp switch
If the function does not work normally, a defect on the relevant circuit or the
ETACS-ECU may be suspected.DMalfunction of driver’s door switch
DMalfunction of column switch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NoCheck the ETACS-ECU battery circuit. (Refer to P.54B-53, Inspec-
tion Procedure Q-1.)
Ye s
NG
Check the defective input circuit. (Refer to P.54B-15, Defects Found
by Input Signal Check.)
OK
Replace the ETACS-ECU.
Do all of the following functions operate when the ignition key
is at the LOCK (OFF) position?
DHazard warninglamp
DRoom lamp
MUT-
IIinput signal check
DIgnition switch (IG1)
DDriver’s door switch
DTail lampswitch
DHeadlamp switch


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SWS -Troubleshooting54B-18
Inspection Procedure B-2
Buzzer: Center display operation annunciation function
does not work normally.Probable cause
If the center display is operating normally, the cause is probably a malfunction in
the harness between the center display and the ETACS-ECU or in the
ETACS-ECU itself.DMalfunction of center display
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
Ye s
NG
Check the center display input circuit. (Refer to P.54B-53, Inspection
Procedure P-19.)
OK
Replace the ETACS-ECU.
MUT-
IIinput signal check
DCenter display
Is the center display operating normally?NoCarry out troubleshooting for the center display. (Refer to
GROUP 54A – Center Display.)
Inspection Procedure C-1
Central door locking system: Central door locking system
does not work normally.Probable cause
The power supply circuit, the circuit shared by door lock actuators, or the
ETACS-ECU may be defective.DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NG
NG
Repair
NG
Check the harness wire between ETACS-ECU and fusible link
(1).
OK
NG
Repair
NG
NG
Repair
OK
Replace the ETACS-ECU.
Check the harness wire between ETACS-ECU and door lock actua-
tor.
OK
Check trouble symptoms.
Check the following connectors:
D-224, D-209, D-218 , D-219 vehicles>
Measure at ETACS-ECU connector D-223.
DDisconnect connector and measure at J/B side.
DVoltage between terminal 12 and body earth.
OK:System voltage
OK
Check trouble symptoms.
Check the following connectors:
D-224, D-211, D-27


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SWS -Troubleshooting54B-19
Inspection Procedure C-2
Central door locking system: Some doors do not lock or
unlock.Probable cause
The door lock actuator, or the harness wire between ETACS-ECU and the door
lock actuator may be defective.DMalfunction of driver’s, front passenger’s, rear or
back door lock actuator
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NGReplace the defective door lock actuator.
OK
NG
Repair
OK
Check trouble symptoms.
OK
Replace the ETACS-ECU.
Check the harness wire between ETACS-ECU and defective door
lock actuator.Repair NG NG
Check the following connectors :
Front L.H. door: D-224, D-209, D-25, H-03
Front R.H. door: D-224, D-209, D-15, H-18
Rear L.H. door: D-224, D-218, D-26, F-18, H-12
Rear R.H. door:D-224, D-218, D-124, F-04, H-21
Back door: D-224, D-218, D-124, G-06, I-06
Check the following connectors :
Front L.H. door: D-224, D-209, D-31, D-15, H-03
Front R.H. door: D-224, D-209, D-31, D-25, H-18
Rear L.H. door: D-224, D-209, D-31, D-26, F-18, H-12
Rear R.H. door: D-223, D-219, F-04, H-21
Back door: D-224, D-219, G-06, I-06
Check the defective door lock actuator. (Refer to GROUP 42 –
Door or GROUP 42 - Back Door.)
Inspection Procedure C-3
Central door locking system:Some functions of central
locking system do not work.Probable cause
The ETACS-ECU operates the central door locking system, based on input
signals from the following switches:
DFront passenger’s or back door lock key cylinder switch
DDriver’s door lock actuator switch
If the system does not work normally, a defect on the relevant circuit or the
ETACS-ECU may be suspected.DMalfunction of front passenger’s or back door lock
key cylinder switch
DMalfunction of driver’s door lock actuator switch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NGCheck the defective input circuit. (Refer to P.54B-15, Defects Found
by Input Signal Check.)
OK
Replace the ETACS-ECU.
MUT-
IIinput signal check
DFront passenger’s or back door lock key cylinder switch
DDriver’s door lock actuator switch


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SWS -Troubleshooting54B-20
Inspection Procedure C-4
Central door locking system: Forgotten key prevention
function does not work.Probable cause
The ETACS-ECU operates the forgotten key prevention function, based on the
input signals from the following switches:
DKey reminder switch
DDriver’s door switch
DDriver’s door lock actuator switch
If the function does not work normally, a defect on the relevant circuit or the
ETACS-ECU may be suspected.DMalfunction of key reminder switch
DMalfunction of driver’s door switch
DMalfunction of driver’s door lock actuator
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NGCheck the defective input circuit. (Refer to P.54B-15, Defects Found
by Input Signal Check.)
OK
Replace the ETACS-ECU.
MUT-
IIinput signal check
DKey reminder switch
DDriver’s door switch
DDriver’s door lock actuator switch
Inspection Procedure D-1
Power window: Power window do not work at all.Probable cause
The power window relay or the ETACS-ECU may be defective.DMalfunction of power window relay
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
OK
NG
NG
Repair
NG
Check the harness wire between power window relay and fusible
link (4).OK
NG
Repair
OK
Replace the ETACS-ECU.
NG
Check the harness wire between power window relay and power
window mainswitch, power window relay and ETACS-ECU.NG
Repair
OK
Check trouble symptoms.
Check the following connectors:
D-221, D-208, D-25, H-05, D-224
Check the power window relay. (Refer to GROUP 42 – Door.)NG
Replace
OK
Check trouble symptoms.
Measure at power window relay connector D-221.
DDisconnect connector and measure at J/B side.
DVoltage between terminal 5 and body earth.
OK:System voltage
DVoltage between terminal 3 and body earth.
OK:System voltageCheck the following connectors:
D-221 D-223, D-27


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SWS -Troubleshooting54B-21
Inspection Procedure D-2
Power window: Power window main switch can not
operate driver’s window.Probable cause
The cause is probably a malfunction of the power windowmainswitch or
driver’s side power window motor, or an abnormality in the power supply circuit.DMalfunction of power windowmainswitch
DMalfunction of driver’s power window motor
DMalfunction of harness wire or connector
NG
Repair
NG
Check the harness wire between driver’s power window motor
and power window relay.
NG
Repair
NG
Check the harness wire between driver’s power window motor
and body earth.
NG
OK
Check trouble symptoms. NG
Repair
OK
Replace the driver’s pow-
er window motor or power
window mainswitch.
NG
Repair
NG
Check the harness wire between driver’s power window motor
and power windowmainswitch.
OK
Check trouble symptoms.
OK
Check the following connectors:
H-04 , H-16 , H-05
(2) NG
Check the following connectors:
H-04 , H-16 , D-25
OK
Check trouble symptoms.
OK
Measure at driver’s power window motor connector H-04 drive vehicles> or H-16 .
DDisconnect connector and measure at harness side.
DTurn the ignition switch to ON position.
(1) Voltage between terminal 3 and body earth.
OK:System voltage
(2) Continuity between terminal 1 and body earth.
OK:Continuity(1) NGCheck the following connectors:
H-04 , H-16 , D-25,
D-208, D-221
MUT-
IIinput signal check
DPower windowmainswitchCheck the power windowmainswitch input circuit. (P.54B-51, In-
spection Procedure P-16.)


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SWS -Troubleshooting54B-22
Inspection Procedure D-3
Power window: Power window sub switch can not operate
front passenger’s or rear window.Probable cause
The cause is probably a malfunction of the power window sub switch or front
passenger’s or rear power window motor, or an abnormality in the power supply
circuit.DMalfunction of power window sub switch
DMalfunction of front passenger’s or rear power
window motor
DMalfunction of harness wire or connector
NG
Repair
OK
NG
Check the harness wire between power window sub switch and
body earth.
NG
Repair
NG
Repair
NG
Repair
NG
Check the harness wire between power window motor and body
earth.
NG
Check the harness wire between power window motor and power
window relay.
OK
Replace the power win-
dow motor.
NG
Repair
NG
Check the harness wire between power window sub switch and
passenger’s power window motor.
OK
Check trouble symptoms.
Check the following connectors:
Front L.H. door: H-04, H-26
Front R.H. door: H-16, H-15
Rear L.H. door: H-10, H-02
Rear R.H. door: H-23, H-19
OK
Check trouble symptom
(2) NG
Check the following connectors:
Front L.H. door: H-04, D-15
Front R.H. door: H-16, D-15
Rear L.H. door: H-10, F-18
Rear R.H. door: H-23, F-04
OK
Check trouble symptom
NG
(1) NG
Check the following connectors:
Front L.H. door: H-04, D-15, D-208, D-221
Front R.H. door: H-16, D-15, D-208, D-221
Rear L.H. door: H-10, F-18, D-26, D-208, D-221
Rear R.H. door: H-23, F-04, D-124, D-208, D-221Measure at power window motor connector H-04 ,
H-16 , H-10 or H-23 R.H. door>.
DDisconnect connector and measure at harness side.
DTurn the ignition switch to ON position.
(1) Voltage between terminal 3 and body earth.
OK:System voltage
(2) Continuity between terminal 1 and body earth.
OK:Continuity
OK
Check trouble symptoms.
OK
Measure at power window sub switch connector H-26 door>, H-15 , H-02 or H-19
.
DDisconnect connector and measure at harness side.
DContinuity between terminal 4 and body earth.
OK:ContinuityNGCheck the following connectors:
Front L.H. door: H-26, D-15
Front R.H. door: H-15, D-15
Rear L.H. door: H-02, F-18
Rear R.H. door: H-19, F-04
Check the power window sub switch. (Refer to GROUP 42 - Door.)NG
Replace


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SWS -Troubleshooting54B-23
Inspection Procedure D-4
Power window: Power window main switch can not
operate front passenger’s or rear window.Probable cause
The cause is probably a malfunction of the power windowmainswitch or front
passenger’s or rear power window motor, or an abnormality in the power supply
circuit.DMalfunction of power windowmainswitch
DMalfunction of front passenger’s or rear power
window motor
DMalfunction of harness wire or connector
NG
Replace the power windowmainswitch.
OK
Replace the power window motor.Check trouble symptoms.
NG
Check the harness wire between power windowmainswitch and
power window motor.NG
Repair
OK
Check trouble symptoms.
Ye s
NG
Check the power windowmainswitch input circuit. (P.54B-51, In-
spection Procedure P-16.)
OK
Check the following connectors:
Front L.H. door: H-05, D-25, D-31, D-15, H-04
Front R.H. door: H-05, D-25, D-31, D-15, H-16
Rear L.H. door: H-05, D-25, D-31, D-26, F-18, H-10
Rear R.H. door: H-05, D-25, D-31, D-124 F-04, H-23NG
Repair
MUT-
IIinput signal check
DPower windowmainswitch
Can the passenger’s side power window be operated by the
power window sub switch?NoCheck the power window sub switch circuit. (Refer to P.54B-22,
Inspection Procedure D-3.)
Inspection Procedure D-5
Power window: Power window timer function does not
work normally.Probable cause
The ETACS-ECU operates the power window timer function, based on the input
signals from the following switches:
DIgnition switch (IG1)
DDriver’s door switch
If the function does not work normally, a defect on the relevant circuit, power
window mainswitch or the ETACS-ECU may be suspected.DMalfunction of driver’s door switch
DMalfunction of power windowmainswitch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
OK
NoNGCheck the defective input circuit. (Refer to P.54B-15, Defects Found
by input Signal Check.)
NG
Replace the power windowmainswitch.
Check trouble symptoms.Replace the ETACS-ECU.
MUT-
IIinput signal check
DIgnition switch (IG1)
DDriver’s door switch
DPower windowmainswitch
Is a diagnosis code output when the ignition switch is at the
OFF (LOCK) position?Ye sCarry out troubleshooting while referring to the Diagnosis Code
Chart on P.54B-9.


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SWS -TroubleshootingSWS -Troubleshooting54B-24
Inspection Procedure D-6
Power window: When the glass is raised, it then lowers
automatically.Probable cause
If the sliding resistance is too large when the glass isbeing raised, it is judged
that something is jammed in the window, and the window is lowered by
approximately 150 mm.DIncorrect window glass adjustment
DGlass slider is incorrectly installed or warped
DMalfunction of power window motor
OK
Replace the power window motor.NG
Replace the window regulator assembly.
Check trouble symptoms.
Check the power window operating currant. (Refer to GROUP
42 – Door.)NGAdjust the window glass. (Refer to GROUP 42 – Door.)
Inspection Procedure D-7
Power window: The glass is jammed in the window.Probable cause
The cause may be a malfunction of the revolution detection sensor in the power
window motor.DMalfunction of power window motor
Replace the power window motor.
Inspection Procedure D-8
Power window: When the glass is fully raised, it then
lowers automatically.Probable cause
The cause may be a malfunction of the revolution detection sensor in the power
window motor.DMalfunction of power window motor
NG
Replace the power window motor.
Check trouble symptoms.
After disconnecting the battery terminals, set the limit switch.
(Refer to GROUP 42 - Door.)
Inspection Procedure E-1
Keyless entry system: Keyless entry system does not
operate.Probable cause
The ETACS-ECU operates the keyless entry system, based on the input signals
from the following switches:
DKey reminder switch
DDoor switches
DDriver’s door lock actuator switch
DTransmitter
If the function does not work normally, a defect on the relevant circuit or the
ETACS-ECU may be suspected.DMalfunction of key reminder switch
DMalfunction of door switches
DMalfunction of driver’s door lock actuator switch
DMalfunction of transmitter
DMalfunction of ETACS-ECU


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