2000 MITSUBISHI MONTERO ECU

SWS -Troubleshooting54B-29
Inspection Procedure G-2
Windshield wiper and washer: Any of the windshield
wiper switch positions is defective.Probable cause
The windshield wiper motor, column switch or the front-ECU may be defective.DMalfunction of windshield wiper motor
DMalfunction of column switch
DMalfunction of front-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 front-ECU.
OK
NG
Repair
NG
Check the harness wire between windshield wiper motor and front-
ECU.NG
Repair
OK
Check trouble symptoms.
Check the following connectors:
B-12, A-05, A-08X
OK
Check the windshield wiper motor. (Refer to GROUP 51 – Wind-
shield Wiper and Washer.)NG
Replace
MUT-
IIinput signal check
DWindshield mist wiper switch
DWindshield intermittent wiper switch
DWindshield low-speed wiper switch
DWindshield high-speed wiper switch
Inspection Procedure G-3
Windshield wiper and washer: Windshield wiper does not
stop at the predetermined park position.Probable cause
The windshield wiper motor or the front-ECU may be defective.DMalfunction of windshield wiper motor
DMalfunction of front-ECU
DMalfunction of harness wire or connector
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between windshield wiper motor and ignition
switch (ACC).
NG
Repair
OK
Replace the front-ECU.
OK
NG
Check the harness wire between windshield wiper motor and front-
ECU.NG
Repair
OK
Check trouble symptoms.
Check the following connectors:
B-12, A-05, A-08X
OK
Check trouble symptoms.
Check the following connectors:
B-12, A-05, D-27, D-223, D-208Measure at windshield wiper motor connector B-12.
DDisconnect connector and measure at harness side.
DTurn the ignition switch to ACC position.
DVoltage between terminal 2 and body earth.
OK:System voltage
Check the windshield wiper motor. (Refer to GROUP 51 – Wind-
shield Wiper and Washer.)


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SWS -TroubleshootingSWS -Troubleshooting54B-30
Inspection Procedure G-4
Windshield wiper and washer: Windshield intermittent
wiper interval cannot be adjusted.Probable cause
The ETACS-ECU calculates the intermittent wiper interval, and sends a signal to
the front-ECU through the SWS communication line. If the signal is defective, the
front-ECU will ignore the signal and set the intermittent wiper interval to 4
seconds.DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NGCheck the windshield intermittent wiper interval adjusting knob sig-
nal input circuit. (Refer to P.54B-50, Inspection Procedure P-15.)
NG
Replace the ETACS-ECU.
OK
Replace the front-ECU.Check trouble symptoms.
MUT-
IIinput signal check
DWindshield intermittent wiper interval adjusting knob
Inspection Procedure G-5
Windshield wiper and washer: Windshield washer does
not work.Probable cause
The windshield washer motor, the column switch or the front-ECU may be
defective.DMalfunction of windshield washer motor
DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
NoCheck the windshield wiper. (Refer to P.54B-13, Trouble Symptom
Chart.)
Ye s
NG
Check the windshield washer switch circuit. (Refer to P.54B-50,
Inspection Procedure P-14.)
OK
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between windshield washer motor and
body earth.
OK
OK
Check trouble symptoms.
NG
Repair
NG
NG
Repair
OK
Replace the front-ECU.
Check the harness wire between windshield washer motor and
front-ECU.
Check the following connectors:
A-35, A-08X
OK
Check trouble symptoms.
Check the following connector:
A-35Measure at windshield washer motor connector A-35.
DDisconnect connector and measure at harness side.
DContinuity between terminal 2 and body earth.
OK:Continuity
Check the windshield washer motor. (Refer to GROUP 51 – Wind-
shield Wiper and Washer.)
MUT-
IIinput signal check
DWindshield washer switch
Is the windshield wiper operated normally?


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SWS -Troubleshooting54B-31
Inspection Procedure H-1
Rear wiper and washer: Rear wiper does not work
normally.Probable cause
The ETACS-ECU operates the rear wiper according to the input signals from the
following switches:
DIgnition switch (ACC)
DRear wiper switch
If the rear wiper does not work normally, the relevant input signal circuit, the
rear wiper motor, the column switch or the ETACS-ECU may be defective.DMalfunction of rear wiper motor
DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
NGCheck the defective input circuit. (Refer to P.54B-15, Defects Found
by Input Signal Check.)
OK
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between rear wiper motor and body earth.
NG
Repair
OK
Replace the ETACS-ECU.
OK
NG
Check the harness wire between rear wiper motor and ETACS-ECU.NG
Replace
OK
Check trouble symptoms.
Check the following connectors:
I-07, G-06, D-124, D-218, D-224
I-07, G-06, D-219, D-224
OK
Check trouble symptoms.
Check the following connector:
I-08Measure at rear wiper motor connector I-07
DDisconnect connector and measure at harness side.
DContinuity between terminal 1 and body earth.
OK:Continuity
Check the rear wiper motor. (Refer to GROUP 51 – Rear Wiper
and Washer.)
MUT-
IIinput signal check
DIgnition switch (ACC)
DRear wiper switch
Inspection Procedure H-2
Rear wiper and washer: Rear wiper does not stop at the
predetermined park position.Probable cause
The rear wiper motor or the ETACS-ECU may be defective.DMalfunction of rear wiper motor
DMalfunction of front-ECU
DMalfunction of harness wire or connector
NGCheck the rear wiper auto-stop signal input circuit. (Refer to
P.54B-46, Inspection Procedure P-9.)
OK
Replace the ETACS-ECU.
MUT-
IIinput signal check
DRear wiper motor auto-stop signal


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SWS -Troubleshooting54B-32
Inspection Procedure H-3
Rear wiper and washer: When the shift lever or
selector lever is moved to R position during the rear
wiper operation, the rear wiper does not operate at the
continuous mode.Probable cause
The ETACS-ECU operates the rear wiper consecutively twice when the shift
lever or selector lever is moved to R position while the rear wiper
is turned on. If the rear wiper does not work consecutively twice, the back-up
lampswitch or the inhibitor switch (reverse) may be defective.DMalfunction of back-uplampswitch
DMalfunction of inhibitor 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
DBack-uplampswitch
DInhibitor switch (reverse)
Inspection Procedure H-4
Rear wiper and washer: Rear washer does not work.Probable cause
The rear washer motor, the column switch or the ETACS-ECU may be defective.DMalfunction of rear washer motor
DMalfunction of column switch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NoCheck the rear wiper. (Refer to P.54B-13, Trouble Symptom Chart.)
Ye s
NG
Check the rear washer switch circuit. (Refer to P.54B-50, Inspection
Procedure P-14.)
OK
NG
NG
Repair
NG
Check the harness wire between windshield washer motor and
body earth.
OK
NG
Repair
OK
Replace the ETACS-ECU.
NG
Check the harness wire between rear washer motor and ETACS-
ECU.NG
Repair
OK
Check trouble symptoms.
Check the following connectors:
I-08, G-06, D-124, D-223, D-224
OK
Check trouble symptoms.
Check the following connector:
I-08Measure at rear washer motor connector I-08.
DDisconnect connector and measure at harness side.
DContinuity between terminal 1 and body earth.
OK:Continuity
OK
Check the rear washer motor. (Refer to GROUP 51 – Rear Wiper
and Washer.)NG
Replace
MUT-
IIinput signal check
DRear washer switch
Is the rear wiper operated normally?


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SWS -Troubleshooting54B-33
Inspection Procedure I-1
Headlamp washer: Headlamp washer does not work.Probable cause
The front-ECU operates theheadlampwashers if theheadlampwasher switch is
turned to ON while the headlamprelays (low and high) are ON and the ignition
switch is at the ACC or ON position.
If the headlampwasher does not work normally, theheadlampwasher motor, the
column switch or the front-ECU may be defective.DMalfunction of headlampwasher motor
DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
NoCheck the defective operation. (Refer to P.54B-13, Trouble Symp-
tom Chart.)
Ye s
NG
Check theheadlampwasher switch circuit. (Refer to P.54B-49,
Inspection Procedure P-13.)
OK
NG
NG
Repair
NG
Check the harness wire betweenheadlampwasher motor and
body earth.
OK
NG
NG
Repair
NG
Check the harness wire between front-ECU and fusible link (4).NG
Repair
OK
Replace the front-ECU.
OK
NG
Check the harness wire betweenheadlampwasher motor and
front-ECU.NG
Repair
OK
Check trouble symptoms.
Check the following connectors:
A-36, A-07X
OK
Check trouble symptoms.
Check the following connector:
A-07XMeasure at front-ECU connector A-07X.
DDisconnect connector and measure at relay box side.
DVoltage between terminal 9 and body earth.
OK:System voltage
OK
Check trouble symptoms.
Check the following connector:
A-36Measure at headlampwasher motor connector A-36.
DDisconnect connector and measure at harness side.
DContinuity between terminal 2 and body earth.
OK:Continuity
OK
Check theheadlampwasher motor. (Refer to GROUP 51 – Head-
lamp Washer.)NG
Replace
MUT-
IIinput signal check
DHeadlamp washer switch
Is the windshield wiper andheadlamp operated normally?


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SWS -TroubleshootingSWS -Troubleshooting54B-34
Inspection Procedure J-1
Ignition key hole illumination lamp: Ignition key hole
illumination lamp does not work normally.Probable cause
The ETACS-ECU operates the ignition keyhole illumination lamp operation,
based on input signals from the following switches:
DIgnition switch (IG1)
DKey reminder switch
DDriver’s door switch
If the ignition key hole illumination lampdoes not work normally, the relevant
input signal circuit, the combination meter or the ETACS-ECU may be defective.DMalfunction of key reminder switch keyless entry system>
DMalfunction of driver’s door switch
DMalfunction of combination meter
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
NG
NG
Repair
OK
NG
Repair
NG
NG
Repair
OK
Replace the ETACS-
ECU.
NG
Repair
NG
Check the harness wire between key reminder switch and fusible
link (2).
OK
Check trouble symptoms.
NG
Check the following connectors:
D-202, D-223 , D-27
OK
Check trouble symptoms.
Check the harness wire between key reminder switch and ETACS-
ECU.
OK
Check trouble symptoms.
Check the following connectors:
D-202, D-226
Check the ignition keyhole illumination lamp bulb.Measure at ETACS-ECU connector D-226.
DDisconnect connector and measure at harness side.
DConnect between terminal 36 and body earth.
OK:Ignition key hole illumination lamp illuminate
MUT-
IIinput signal check
DIgnition switch (IG1)
DKey reminder switch
DDriver’s door switch
Inspection Procedure K-1
Headlamp, tail lamp: Tail lamp do not illuminate.Probable cause
The column switch or the front-ECU may be defective.DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
OK
Replace the front-ECU.
Ye sCarry out troubleshooting while referring to the Diagnosis Code
Chart on P.54B-9.
No
NG
Check the taillampswitch input circuit. (Refer to P.54B-49, Inspec-
tion Procedure P-13.)
NG
Repair
NG
Check the harness wire between front-ECU and battery.
OK
Check trouble symptoms.
OK
NG
Check the following connector:
A-07XMeasure at front-ECU connector A-07X.
DDisconnect connector and measure at relay box side.
DVoltage between terminal 5 and body earth.
OK:System voltage
MUT-
IIinput signal check
DTail lampswitch
Is a diagnosis code output when the ignition switch is at the
OFF (LOCK) position?
NOTE
If only one lamp does not illuminate, the harness wire between the lamp and front-ECU may be defective
or the light bulb may be burned out. In this case, check the tail lamp circuit


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SWS -Troubleshooting54B-35
Inspection Procedure K-2
Headlamp, tail lamp: Headlamps (low-beam) do not
illuminate.Probable cause
The column switch or the front-ECU may be defective.DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
OK
Replace the front-ECU.
No
NG
Check theheadlampswitch input circuit. (Refer to P.54B-49, Inspec-
tion Procedure P-13.)
Ye sCarry out troubleshooting while referring to the Diagnosis Code
Chart on P.54B-9.
NG
Repair
NG
Check the harness wire between front-ECU and battery.
OK
Check trouble symptoms.
OK
NG
Check the following connector:
A-07XMeasure at front-ECU connector A-07X.
DDisconnect connector and measure at relay box side.
DVoltage between terminal 3 and body earth.
OK:System voltage
DVoltage between terminal 4 and body earth.
OK:System voltage
MUT-
IIinput signal check
DHeadlamp switch
Is a diagnosis code output when the ignition switch is at the
OFF (LOCK) position?
NOTE
If only one of the headlamps (low-beam) does not illuminate, the harness wire between the headlamp
and front-ECU may be defective or the headlamp bulb may be burned out. In this case, check the headlamp
circuit.
Inspection Procedure K-3
Headlamp, tail lamp: Headlamps (high-beam) do not
illuminate.Probable cause
The column switch or the front-ECU is suspected to be defective.DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
OK
Replace the front-ECU.
Is the headlamps (low-beam) operated normally?NoCheck theheadlamp (low-beam)circuit. (Refer to P.54B-35, Inspec-
tion Procedure K-2.)
Ye s
MUT-
IIinput signal check
DDimmer switchNGCheck the dimmer switch input circuit. (Refer to P.54B-49, Inspection
Procedure P-13.)
NOTE
If only one of the headlamps (high-beam) does not illuminate, the harness wire between the headlamp
and front-ECU may be defective or the headlamp bulb may be burned out. In this case, check the headlamp
circuit.


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SWS -Troubleshooting54B-36
Inspection Procedure K-4
Headlamp, tail lamp: Headlamps do not illuminate when
the passing switch is operated.Probable cause
If the headlamps (low-beam and high-beam) are defective, the column switch or
the front-ECU is suspected to be defective.DMalfunction of column switch
DMalfunction of front-ECU
DMalfunction of harness wire or connector
OK
Replace the front-ECU.
Is the headlamps (low-beam and high-beam) operated normally?NoCheck the defective circuit. (Refer to P.54B-13, Trouble Symptom
Chart.)
Ye s
MUT-
IIinput signal check
DPassing switchNGCheck the passing switch input circuit. (Refer to P.54B-49, Inspec-
tion Procedure P-13.)
Inspection Procedure K-5
Headlamp, tail lamp: The headlamp automatic shutdown
function does not work normally.Probable cause
The ETACS-ECU operates theheadlamp automatic shutdown function,based on
the signals from the following switches
DIgnition switch (IG1)
DDriver’s door switch
DHeadlamp switch
If the head lamp automatic shutdown functiondoes work normally, a defect on
relevant input circuits, the ETACS-ECU or the front-ECU is suspected.DMalfunction of driver’s door switch
DMalfunction of column switch.
DMalfunction of front-ECU
DMalfunction of harness wire or connector
No
NG
Check the defective input circuit. (Refer to P.54B-15, Defects Found
by Input Signal Check.)
Ye sCarry out troubleshooting while referring to the Diagnosis Code
Chart on P.54B-9.
NG
Replace the front-ECU.
OK
Replace the ETACS-ECU.Check trouble symptoms.
MUT-
IIinput signal check
DIgnition switch (IG1)
DDriver’s door
DHeadlamp switch
Is a diagnosis code output when the ignition switch is at the
OFF (LOCK) position?


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