ignition MITSUBISHI MONTERO 2000 Service Repair Manual

SWS -Troubleshooting54B-49
Inspection Procedure P-13
Column switch:
D
Tail lamp switch signal is not sent to the ETACS-ECU.
D
Headlamp switch signal is not sent to the ETACS-ECU.
D
Dimmer switch signal is not sent to the ETACS-ECU.
D
Passing switch signal is not sent to the ETACS-ECU.
D
Turn-signal lamp switch signal is not sent to the
ETACS-ECU.
D
Headlamp washer switch is not sent to the ETACS-ECU.
Probable cause
The column switch (lighting switch) is used to operate the following systems or
functions. If the signal fails, these systems or function will not work normally.
DHeadlamp washer
DHeadlamp, tail lamp
DTurn-signal lamp
DFront fog lamp
DRear foglampDMalfunction of column switch
DMalfunction of ETACS-ECU
NG
Replace the ETACS-ECU.
Ye sCarry out troubleshooting while referring to the Diagnosis Code
Chart on P.54B-9.
Check trouble symptoms.
No
Replace the column switch (lighting switch).
OK
Replace the column switch (wiper and washer switch).
No
Check the column switch (lighting switch and switch body). (Refer
to GROUP 54A - Column Switch.)NG
Replace
Is a diagnosis code output when the ignition switch is at the
OFF (LOCK) position?


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SWS -Troubleshooting54B-50
Inspection Procedure P-14
Column switch:
D
Windshield mist wiper switch signal is not sent to the
ETACS-ECU.
D
Windshield intermittent wiper switch signal is not sent to
the ETACS-ECU.
D
Windshield low-speed wiper switch signal is not sent to the
ETACS-ECU.
D
Windshield high-speed wiper switch signal is not sent to
the ETACS-ECU.
D
Windshield washer switch is not sent to the ETACS-ECU.
D
Rear wiper switch is not sent to the ETACS-ECU.
D
Rear washer is not sent to the ETACS-ECU.
Probable cause
The column switch (wiper and washer switch) is used to operate the following
systems or functions. If the signal fails, these systems or function will not work
normally.
DWindshield wiper and washer
DRear wiper and washerDMalfunction of column switch
DMalfunction of ETACS-ECU
NG
Replace the ETACS-ECU.
Ye sCarry out troubleshooting while referring to the Diagnosis Code
Chart on P.54B-9.
Check trouble symptoms.
No
Replace the column switch (wiper and washer switch).
OK
Replace the column switch (lighting switch).
No
Check the column switch (wiper and washer switch and switch
body). (Refer to GROUP 51 - Windshield Wiper and Washer and
GROUP 54A - Column Switch.)NG
Replace
Is a diagnosis code output when the ignition switch is at the
OFF (LOCK) position?
Inspection Procedure P-15
Column switch: Windshield intermittent wiper interval
adjusting knob signal is not sent to the ETACS-ECU.Probable cause
If the windshield intermittent wiper interval adjusting knob is defective the
windshield intermittent wiper interval can not be adjusted.DMalfunction of column switch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
OK
Replace the ETACS-ECU.
NG
Check the harness wire between column switch and ETACS-ECU.NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
D-203, D-226NG
Repair
Check the windshield intermittent wiper interval adjusting knob.
(Refer to GROUP 51 - Windshield Wiper and Washer.)NG
Replace


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SWS -Troubleshooting54B-51
Inspection Procedure P-16
Power window main switch: Any switch signal is not sent
to the ETACS-ECU.Probable cause
If there is a problem with communication between the power windowmainswitch
and the ETACS-ECU, the input signal check for the power windowmainswitch
can no longer be carried out. In addition, the power window timer function will
also stop working.DMalfunction of power windowmainswitch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
Ye s
NG
Repair
NG
No
(1) NG
NG
Repair
NG
Check the harness wire between power windowmainswitch and
power window relay.
OK
Replace the power windowmainswitch.
NG
Repair
NG
Check the harness wire between power windowmainswitch and
body earth.
NG
Repair
Check trouble symptoms.NGReplace the ETACS-
ECU.
OK
Check trouble symptoms.
(2) NG
Check the following connectors:
H-05, D-25
OK
Check trouble symptoms.
Check the following connectors:
H-05, H-25, D-208, D-221Measure at power windowmainswitch connector H-05.
DDisconnect connector and measure at harness side.
DTurn the ignition switch to ON position.
(1) Voltage between terminal 1 or
5 and body earth.
OK:System voltage
(2) Continuity between terminal 5
or 3 and body earth.
OK:Continuity
OK
Replace the power win-
dow mainswitch
Check the harness wire between power windowmainswitch and
ETACS-ECU.
OK
Check trouble symptoms.
Check the following connectors:
H-05, D-25, D-31, D-226Can the driver’s side power window be operated by the power
window mainswitch?


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SWS -Troubleshooting54B-53
Inspection Procedure P-19
Center display: Any switch signal is not sent to the
ETACS-ECU.Probable cause
The cause is probably a malfunction of the center display or the ETACS-ECU.DMalfunction of center display
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector.
Ye s
NG
Repair
NG
Replace the ETACS-ECU.
OK
Replace the center display.Check trouble symptoms.
NG
Check the harness wire between center display and ETACS-ECU.NG
Repair
OK
Check trouble symptoms.
Check the following connectors:
D-06, D-31, D-226
Is the center display operated normally?NoCarry out troubleshooting for the center display. (Refer to
GROUP 54A – Center Display.)
Inspection Procedure Q-1
Check the circuit (power supply line) from the battery to
the ETACS-ECU.Probable cause
If that power supply circuit is defective, the circuit flowing through the ignition
switch (IG1) will function as a back-up circuit. In this case, the following
functions will not work when the ignition switch is at LOCK (OFF) position.
DIgnition key reminder warning buzzer function
DCentral door lock ing system
DIgnition key hole illumination lamp
DHazard warninglamp
DRoom lampDMalfunction of ETACS-ECU
DMalfunction of harness wire or connector.
NG
NG
Repair
NG
Check the harness wire between ETACS-ECU and fusible link
(2).
OK
Replace the ETACS-ECU.
OK
Check trouble symptoms.
Check the following connectors:
D-224, D-223, D-27Measure at ETACS-ECU connector D-224.
DDisconnect connector and measure at J/B side.
DVoltage between terminal 6 and body earth.
OK:System voltage


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SWS -Troubleshooting54B-55
Terminal
No.Normal condition Checking requirements Check items
26Key reminder switch signal inputKey reminder switch: ON (Ignition key
removed)0V
27Hazard warning lamp switch signal
inputHazard warning lamp switch: ON0V
29Recognition line of daytime running
lamp (DRL) Always0V
31Data request signal outputAlways0 - 5 V (pulse
signal)
34Windshield intermittent wiper interval
adjusting knob signal inputIgnition switch: ACC,
Windshield intermittent wiper interval
adjusting knob: FAST®SLOW0®2.5 V
35Back-up lamp switch signal input
Ignition switch: ON,
Shift lever: RSystem voltage
Inhibitor switch (reverse) signal input
Ignition switch: ON,
Selector lever: RSystem voltage
36Ignition key hole illumination lamp
outputWhen ignition key hole illumination
lamp is lighted2 V or less
37Diagnosis code or input signal check
outputWhen diagnosis code is output0 - 12 V (pulse
signal)
When input signal check is output0, 12 V (When input
pulse signal is
changed)
40Rear fog lamp relay outputWhen rear fog lamp is lighted2 V or less
53Front passenger’s and back door lock
key cylinder switch (LOCK) signal inputFront passenger’s or back door lock key
cylinder switch: LOCK0V
54Front passenger’s and back door lock
key cylinder switch (UNLOCK) signal
inputFront passenger’s or back door lock
switch: UNLOCK0V
55Driver’s door lock actuator switch
(LOCK) signal inputDriver’s door lock actuator switch:
LOCK0V
56Driver’s door lock actuator switch
(UNLOCK) signal inputDriver’s door lock actuator switch:
UNLCOK0V


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SWS -On-vehicle Service54B-60
ON-VEHICLE SERVICE
ADJUSTMENT PROCEDURES OF SWS FUNCTION
Through special operation of input switches, it is possible to disable and enable the functions listed below.
Settings are retained even if the battery is disconnected.
DKeyless entry hazard answerback function
DInitialization of above mentioned functions
Configuration Mode Entry Conditions
1. Set each switch at the following condition.
DHazard warning lamp switch: OFF
DDiagnosis control: ON (MUT-II
connected or terminal 1 of diagnosis connector connected to earth)
DKey reminder switch: OFF (ignition key inserted)
DIgnition switch: LOCK (OFF)
DDriver’s door switch: OFF (driver’s door closed)
2. When the windshield washer switch is continuously turned ON for more than 10 seconds, the buzzer
integrated in the ETACS-ECU sounds once and the mode is switched to the configuration mode.
Configuration Mode Cancellation Conditions
The ETACS-ECU cancels the configuration mode when any of the conditions listed below is satisfied.
DDiagnosis control: OFF (MUT-II
disconnected or terminal 1 of diagnosis connector disconnected from
earth)
DKey reminder switch: ON (ignition key removed)
DIgnition switch: any position other than LOCK (OFF)
DDriver’s door switch: ON (driver’s door open)
DNo configuration performed within three minutes of entry to configuration mode (If configuration is
performed within first three minutes, monitoring continues for three minutes from that point.)
Configuration of Functions
FunctionConfiguration procedure
Keyless entry hazard
answerbackIf the transmitter’s LOCK switch is turned ON twice within two seconds, the lock answerback
function’s enabled/disabled status is inverted.
D
When function is enabled, buzzer sounds once (initial status).
D
When function is disabled, buzzer sounds twice.
If the transmitter’s UNLOCK switch is turned ON twice within two seconds, the unlock
answerback function’s enabled/disabled status is inverted.
D
When function is enabled, buzzer sounds once (initial status).
D
When function is disabled, buzzer sounds twice.
Initialization of above
mentioned functionsIf the windshield washer switch is turned ON for more than 20 seconds, the buzzer sounds
twice and all functions are initialized. (The configuration mode entry buzzer sounds after 10
seconds, but the switch must be kept ON for 20 seconds to achieve initialization.)
IF the windshield washer switch ins kept ON for more than 20 seconds without prior entry
of the configuration mode, the configuration mode is entered after 10 seconds and
initialization does not take place.


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HEATER, AIR CONDITIONER AND VENTILATION -Troubleshooting 55B-6
Code No.31 Potentiometer system for the air mix
damperProbable cause
This diagnosis code is set when the potentiometer for the air mix damper does
not send any signal to the A/C-ECU due to short oropencircuit.DMalfunction of the potentiometer system for the air
mix damper
DMalfunction of connector or harness
DMalfunction of the A/C-ECU
NG
Repair
NG
Repair
NG
Check the harness wire between the air mix damper motor
and the A/C-ECU, and repair if necessary.
OK
Replace the automatic A/C control panelassembly (A/C-ECU).
NG
Repair
OK
Replace the automatic
A/C control panel
assembly (A/C-ECU).
OK
Check the trouble
symptoms.
OK
Measure at A/C-ECU connector D-132.
DConnect the connector.
DIgnition switch: ON
DAir mix damper: MAX HOT position
DVoltage between terminal 24 and body earth
OK:0.7 - 1.3 VNGCheck the following connectors:D-130, D-132
NG
Check the harness wire between the air mix damper motor
and the A/C-ECU.
OK
Check the trouble
symptoms.
OK
Measure at air mix damper motor connector D-130.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 7 and body earth
OK:5V
DContinuity between terminal 5 and body earth
OK:ContinuityNGCheck the following connectors:D-130, D-132
Check the potentiometer system for the air mix damper
(Refer to P.55B-27).NG
Replace


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HEATER, AIR CONDITIONER AND VENTILATION -Troubleshooting 55B-7
Code No.32 Potentiometer system for the air outlet
changeover damperProbable cause
This diagnosis code is set when the potentiometer for the air outlet changeover
damper does not send any signal to the A/C-ECU due toopen orshort circuit.DMalfunction of the potentiometer for the air outlet
changeover damper
DMalfunction of connector or harness
DMalfunction of the A/C-ECU
NG
Repair
NG
Repair
NG
Check the harness wire between the air outlet changeover
damper motor and the A/C-ECU, and repair if necessary.OK
Replace the automatic A/C control panelassembly (A/C-ECU).
NG
Repair
OK
Replace the automatic
A/C control panel
assembly (A/C-ECU).
OK
Check the trouble
symptoms.
OK
Measure at A/C-ECU connector D-132.
DConnect the connector.
DIgnition switch: ON
DAir outlet changeover damper: DEF position
DVoltage between terminal 32 and body earth
OK:0.7 - 1.3 VNGCheck the following connectors:D-24, D-132
NG
Check the harness wire between the air outlet changeover
damper motor and the A/C-ECU.
OK
Check the trouble
symptoms.
OK
Measure at air outlet changeover damper motor connector
D-24.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 7 and body earth
OK:5V
DContinuity between terminal 5 and body earth
OK:ContinuityNGCheck the following connectors:D-24, D-132
Check the potentiometer for the air outlet changeover damper
(Refer to P.55B-27).NG
Replace
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspection pro-
cedure No.Reference
page
Communication with MUT-IIis impossible.155B-8
The air conditioner does not operate at all.255B-9
The air conditioner display does not appear on the center display screen.355B-9
A/C outlet air temperature can not be set.455B-10
The blower does not operate.555B-11
The blower air volume can not be changed.655B-12
Air outlet vent cannot be changed.755B-12
Inside/outside air changeover is not possible.855B-13
The rear defogger does not operate.955B-14
The condenser fan does not operate .1055B-15
The condenser fan does not operate <4D56>.1155B-16


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HEATER, AIR CONDITIONER AND VENTILATION -Troubleshooting 55B-9
Inspection procedure 2
The air conditioner does not operate at all.
Probable cause
The power supply system (including earth) for the A/C-ECU may be defective. In
addition, the A/C-ECU may be inoperative due to a defective harness (such as
short).DMalfunction of harness or connector
DMalfunction of the A/C-ECU
NG
Repair
NG
Check the harness wire between the A/C-ECU and the ignition
switch (IG2), and repair if necessary.
NG
Repair
NG
Check the harness wire between the A/C-ECU and the ignition
switch (ACC), and repair if necessary.
NG
Repair
NG
Check the harness wire between the A/C-ECU and fusible link
(2), and repair if necessary.
NG
Repair
NG
Check the harness wire between the A/C-ECU and body
earth, and repair if necessary.
OK
Replace the automatic
A/C control panel
assembly (A/C-ECU).
NG
Repair
Check circuit, where the A/C-ECU terminal voltage is
abnormal.
OK
Check at the A/C-ECU terminals (Refer to P.55B-18).
OK
Check the trouble symptoms.
Check the following connectors:D-132, D-30
(4) NG
OK
Check the trouble
symptoms.
Check the following connectors:
D-131, D-31, D-223, D-27
D-131, D-33, D-27
(3) NGOK
Check the trouble
symptoms.
Check the following connectors:D-132, D-33, D-210, D-208(2) NG
OK
Check the trouble
symptoms.
Measure at A/C-ECU connector D-132.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
(1) Voltage between terminal 26 and body earth
OK:System voltage
(2) Voltage between terminal 27 and body earth
OK:System voltage
(3) Voltage between terminal 28 and body earth
OK:System voltage
(4) Continuity between terminal 36 and body earth
OK:Continuity(1) NGCheck the following connectors:D-132, D-32, D-210, D-208
Inspection procedure 3
The air conditioner display does not appear on the
center display screen.
Probable cause
Check the harness wires between the A/C-ECU and the center display, and
repair if necessary.DMalfunction of harness or connector
DMalfunction of the A/C-ECU
OK
Replace the automatic A/C control panelassembly (A/C-ECU).
NG
Check the harness wires between the A/C-ECU and the
center display.NG
Repair
OK
Check the trouble symptoms.
Check the following connectors:D-131, D-06NG
Repair


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HEATER, AIR CONDITIONER AND VENTILATION -Troubleshooting 55B-11
Inspection procedure 5
The blower does not operate.
Probable cause
If no air comes out of the blower even though the blower switch is on, the
cause is probably a malfunction of the front blower relay circuit.DMalfunction of the front blower relay
DMalfunction of the blower linear controller
DMalfunction of the blower motor
DMalfunction of harness or connector
DMalfunction of the A/C-ECU
NG
Repair
NG
Repair
NG
Repair
NG
Check the harness wire between the front blower relay and
the ignition switch (IG2), and repair if necessary.
NG
Check the harness wire between the front blower relay and
the battery, and repair if necessary.
NG
Repair
NG
Check the harness wire between the blower linear controller
and body earth, and repair if necessary.
OK
Replace the automatic A/C control panelassembly (A/C-ECU).
NG
Check the harness wires between the front blower relay and
the blower linear controller, between the front blower relay and
the blower motor, between the blower motor and the blower
linear controller and between the front blower relay and the
A/C-ECU.NG
Repair
OK
Check the trouble symptoms.
OK
Check the following connectors:D-220, D-208, D-126, D-17,
D-131,D-209
OK
Check the trouble symptoms.
OK
Measure at blower linear controller connector D-126.
DDisconnect the connector and measure at the harness
side.
DContinuity between terminal 4 and body earth
OK:ContinuityNGCheck the following connector:D-126
OK
Check the trouble symptoms.
Check the following connectors:D-220, D-208
(2) NG
OK
Check the trouble symptoms.
NG
Measure at front blower relay connector D-220.
DDisconnect the connector, and measure at the J/B side.
DIgnition switch: ON
(1) Voltage between terminal 2 and body earth
OK:System voltage
(2) Voltage between terminal 3 and body earth
OK:System voltage(1) NGCheck the following connectors:D-220, D-211, D-27
OK
Check the blower linear controller (Refer to P.55B-26).NG
Replace
OK
Check the blower motor (Refer to GROUP 55A - Front A/C).NG
Replace
OK
Check the front blower relay
(Refer to GROUP 55A - On-vehicle Service).NG
Replace
MUT-
IIActuator Test
01, 02, 03, 04 Blower motorOKReplace the automatic A/C control panelassembly (A/C-ECU).


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