relay MITSUBISHI MONTERO 2000 Service Repair Manual

SWS -General InformationSWS -General Information54B-2
GENERAL INFORMATION
COMMUNICATION LINE
Data lines for multiplex communication are connected between the front-ECU, ETACS-ECU, column switch
assembly, sunroof motor assembly, center display, power window main switch, and power window motors
as illustrated below.
ETACS-ECUMUT-II
Column switch
assembly
Front-ECU
Power window
main switch
Power window motor
(front-right)
Center display*1
Sunroof motor
assembly*2Power window motor
(front-left)
Power window motor
(rear-right)
Power window motor
(rear-left)

NOTE
: Uni-directional communication line
: Bi-directional communication line
*
1: Vehicles with center display
*2: Vehicles with sunroof
OPERATION
BUZZER
Light Reminder Warning Buzzer Function
When the driver’s door is opened with lighting switch
in the ON (tail lamp switch or headlamp switch)
position and ignition switch in the LOCK (OFF) or
ACC position, the buzzer will sound continuously to
remind the driver that the lamps (tail lamps or
headlamps) are ON.
This function does not work if the lighting switched
off through the headlamp automatic shutdownfunction. In addition, the ignition key reminder
warning buzzer function has a priority over this
function.
Center Display Operation Annunciation
Function
On vehicles with center display, the buzzer (peeps)
sounds when the operation switch of the audio
and navigation system is pressed.
CENTRAL DOOR LOCKING SYSTEM
Central Door Locking System Operation
When the lock switch is turned ON after the unlock
switch on the driver’s door lock actuator switch
is OFF, the ETACS-ECU gives a lock output for
0.5 second. When the unlock switch is turned ON
after the lock switch on the driver’s door lock
actuator switch is OFF, the ETACS-ECU gives an
unlock output for 0.5 second.
When the front passenger’s door key or back door
key is operated, the ETACS-ECU gives a lock or
unlock output for 0.5 second.Forgotten Key Prevention Function
If, with the key reminder switch OFF and the driver’s
door switch ON, the driver’s door lock switch is
turned ON after the door unlock switch in the front
door lock actuator is turned OFF, the ETACS-ECU
waits 0.3 second then give an unlock relay output
for 0.5 second, there by preventing the doors from
being locked. This operation prevents the ignition
key from being locked inside the vehicle. This
function takes precedence over the central door
locking control function.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

SWS -General Information54B-3
POWER WINDOWS
Power Windows Operation
A signal line dedicated for transmission of multiplex
communication data is connected between the
power window main switches and the power window
motor-ECU.
Communication is uni-directional. The power
window main switches have a transmitting circuit
only, whereas the power window sub switches have
a receiving circuit only.
Power Window Timer Function
With the ignition switch in the ON position, the power
window relay and power window switch receipt
permission signal (a SWS signal transmitted from
the ETACS-ECU) are turned ON [the power windowswitch receipt permission signal remains ON for 30
seconds after the ignition switch is turned LOCK
(OFF)], enabling opening and closing of the
windows. The power window relay goes ON for
additional 30 seconds. If the driver’s door is
subsequently closed during this period, the receipt
permission signal goes OFF. The power window
relay goes OFF 10 seconds after the receipt
permission signal goes OFF.
If the driver’s door is opened during timer operation,
the receipt permission signal goes ON for additional
30 seconds. If the driver’s door is subsequently
closed during this period, the receipt permission
signal goes OFF ten seconds after the receipt
permission signal goes OFF.
KEYLESS ENTRY SYSTEM
Keyless Entry System Operation
If the transmitter LOCK or UNLOCK switch is
pressed while the ignition key is removed and all
of the doors are closed, the doors can be locked
or unlocked.
Keyless Entry Answerback Function
The keyless entry hazard answerable function
facilitates confirmation of door locking and unlock-
ing operations even in daylight. When a LOCKsignal from the keyless entry transmitter is applied
to the ETACS-ECU, all of the turn-signal lamps flash
twice. When an UNLOCK signal from the keyless
entry transmitter is applied to the ETACS-ECU, all of
the turn-signal lamps flash four times. Note that an
unlock switch has change from OFF to ON.
NOTE
The hazard answer back is enabled or disabled
by the configuration function.
SUNROOF
Sunroof Operation
All of the slide open/close, tilt up/down, and stop
operations can be performed by a single switch.
When the roof lid glass is tilted up, the sunshade
opens approximately 98 mm in combined operation
with the roof lid glass for better ventilation.
A jam preventing mechanism has been adopted.
When a slide-close or tilt-down operation is blocked
by an external force, the roof lid glass moves back
and stops.Sunroof Timer Function
When the ignition switch is turned from ON position
to LOCK (OFF) or ACC position, the sunroof will
be ready to work for 30 seconds.
If the driver’s door is opened during the timer
operation, the timer operates for another
30
seconds starting from that point. However, the
timer operation discontinues if the door is closed
during that period.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

SWS -General Information54B-4
WINDSHIELD WIPER AND WASHER
Windshield Low-speed/High-speed Wiper
Operation
DIf the windshield low-speed wiper switch is
turned to the ON position with the ignition switch
at the ACC or ON position, the column switch
sends a low-speed wiper ON and high-speed
wiper OFF signals to the front-ECU.
This turns the wiper signal on and the wiper
speed switching relay off (low-speed), causing
the wipers to operate at low-speed.
DIf the windshield high-speed wiper switch is
turned to the ON position, the column switch
sends a low-speed wiper OFF and high-speed
wiper ON signals to the front-ECU.
This turns both the wiper signal and the wiper
speed switching relay on (high-speed), causing
the wipers to operate at high-speed.
Windshield Intermittent Wiper Operation
The ETACS-ECU calculates the wiper operation
interval according to the voltage signal sent from the
column switch. Then the ETACS-ECU sends a
signal to the front-ECU. The front-ECU determines
the wiper operation interval and turns on the wiper
signal relay. This causes the wiper auto stop relay to
turn on. Then the wiper auto stop relay will turn off
after the wipers reach the park position. This causes
the wiper signal relay and then the wipers to turn off.
If the wiper signal relay remains off for the wiper
operation interval, the relay turns on again, causing
the wipers to operate in intermittent mode.Windshield Mist Wiper Operation
DIf the windshield mist wiper switch of the column
switch is turned to the ON position with the
ignition switch at ACC or ON position, the mist
wiper high-speed operation signal is sent to
the front-ECU. This signal turns on the wiper
speed switching relay, causing the wipers to
work at high-speed while the mist switch is
on.
DWhile the windshield mist wiper switch remains
turned on when the intermittent mode is still
working, the wipers work as the mist wiper.
However, the wipers return to the intermittent
mode again when the wiper auto stop signal
turns on after the mist wiper switch is turned
off.
Windshield Washer Operation
If the windshield washer switch of the column switch
is turned to the ON position with the ignition switch
at ACC or ON position, the windshield washer ON
signal is sent to the front-ECU, causing the
windshield wiper signal to turn on after 0.3 seconds.
After the windshield washer switch signal turns off,
the windshield wiper signal turns off in three
seconds.
If the windshield wiper switch is turned to the ON
position while the windshield wiper is at intermittent
mode, the windshield washer works for that period
when the windshield washer switch remains on.
Then the wipers return to the intermittent mode.
REAR WIPER AND WASHER
Rear Wiper Operation
If the rear wiper switch is turned to the ON position
with the ignition switch at ACC or ON position,
the ETACS-ECU turns ON the rear wiper drive signal
for three seconds (approx. two operations). 7.4
seconds later, the wiper begins the intermittent
operation with 8 seconds’ cycle.
If the shift lever or selector lever is
moved to the R position when the rear wiper switch
is turned to the ON position and the ignition switch
at ACC or ON position, back-up lamp switch
or inhibitor switch R turns ON. One second
later, the ETACS-ECU turns ON the rear wiper drive
signal for three seconds (approx. two operations)
to clear the rear field of view. 7.4 seconds later,
the wiper returns to the intermittent operation with
8 seconds’ cycle.Rear Washer Operation
If the rear washer switch is turned to the ON position
with the ignition switch at ACC or ON position,
the rear washer ON signal is sent to the
ETACS-ECU, causing the rear wiper signal to turn
on after 0.3 seconds. After the rear washer switch
signal turns off, the rear wiper signal turns off in
three seconds.
If the rear wiper is in intermittent operation when
the rear washer switch is turned ON, the rear wiper
again continues the intermittent operation with 8
seconds’ cycle from 7.4 seconds later since the
rear drive signal is turned OFF.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

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


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

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.)


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

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


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

SWS -Troubleshooting54B-28
Inspection Procedure G-1
Windshield wiper and washer: Windshield wiper does not
operate.Probable cause
If the windshield wiper does not work at all, 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
OK
NG
Replace
NG
Repair
NG
Repair
NG
Check the harness wire between windshield wiper motor and body
earth.
NG
Repair
NG
Check the harness wire between front-ECU and ignition switch
(ACC).
OK
Check trouble symptoms.
OK
Check trouble symptoms.
OK
Replace the front-ECU.
NG
NG
Repair
Check the harness wire between front-ECU and windshield wiper
motor.
OK
Check trouble symptoms.
OK
Check the following connectors:
B-12, A-05, A-08X
OK
Measure at front-ECU connector A-08X.
DDisconnect connector and measure at relay box side.
DTurn the ignition switch to ACC position.
DVoltage between terminal 24 and body earth.
OK:System voltageNGCheck the following connectors:
A-08X, D-27, D-223, D-208
OK
Measure at windshield wiper motor connector B-12.
DDisconnect connector and measure at harness side.
DContinuity between terminal 5 and body earth.
OK:ContinuityNGCheck the following connector:
B-12
Check the windshield wiper motor. (Refer to GROUP 51 – Wind-
shield Wiper and Washer.)
MUT-
IIinput signal check
DWindshield mist wiper switch
DWindshield intermittent wiper switch
DWindshield low-speed wiper switch
DWindshield high-speed wiper switchNGCheck the defective input circuit. (Refer to P.54B-15, Defects Found
by Input Signal Check.)


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

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?


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

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


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

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.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk