clock MITSUBISHI MONTERO 2000 Service Owner's Manual

CHASSIS ELECTRICAL -Clock or Center Display54A-54
BEFORE REMOVING THE BATTERY
The Center display has a large amount of data unique to the vehicle in its memory. When the battery
cable is disconnected, that memory is affected as shown in the table below. Accordingly, it is necessary
to make sure that you take notes of important information before disconnecting the battery cable.
FunctionInput function/memoryWhen battery cable is disconnected
Clock set on displayCurrent timeRetains data for approx. 1 hour
Vehicle model setShort (3-door models)/long (5-door
models)Retains data for approx. 1 hour
Brightness set for displayPosition set on displayRetains data for approx. 1 hour
Unit set for trip computerkm or mile, L/100km or mpg or km/L
Average vehicle speed after resetRetains data for approx. 1 hour
Average vehicle speed on displayAverage vehicle speed after resetRetains data for approx. 1 hour
Average fuel consumption on displayAverage fuel consumption after resetRetains data for approx. 1 hour
Cruising range on displayCruising range, fuel economyRetains data for approx. 1 hour
Outside temperature on displayOutside temperature after the ignition
switch is turned to the OFF(LOCK)
position.Retains data for approx. 1 hour
* The outside temperature sensor
is located near the engine.
Therefore, incorrectly high
temperature may be displayed
when the battery cable is
reconnected within one hour.
DIAGNOSIS FUNCTION FOR CENTER DISPLAY
Center display has the following diagnosis function:
FunctionContents
Service functionThere are the following 4 diagnosis modes available
1. Check of vehicle informationThe vehicle, short (3-door models)/long (5-door models) set
2. Check of LCD segmentsThe LCD segments for display available to light on or not
3. Check of sensorsOutside temperature, voltage of fuel gauge unit, system voltage, fuel amount
remains, fuel economy calculated after supply of fuel
4. Check of units connected into
the center displayThe units connected on display
Voltage (%) on terminal for MUT-II
Vehicle speed signal sent by engine-ECU
Oscillating signal


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CHASSIS ELECTRICAL -Clock or Center Display54A-60
Terminal
No.Input/
OutputSignal symbolTerminal
voltage (V)Wiring harness
problemTrouble symptom caused by wiring
harness problem
Open
circuitShort
circuit
15Input/
OutputKHi: System
voltage
Lo: 0-1ExistsExistsValues on trip information screen (average
vehicle speed, fuel consumption and
cruising distance) are abnormal. Commu-
nication is impossible between the
engine-ECU and the MUT-II.
16------
17Input/
OutputM-BUSY
(AUDIO)Hi: 4-5
Lo: 0-1ExistsExistsAudio display does not appear. Panel
switch cannot be operated for audio unit.
Nighttime illumination does not appear for
audio unit.
18-SHIELD-GND----
19Input/
OutputM-BUSY
(A/C)Hi: 4-5
Lo: 0-1ExistsExistsA/C display does not appear.
Outside air temperature does not appear
20-SHIELD-GND----
21, 22------
23InputEX-TEMPExistsExistsOutside air temperature does not appear.
24InputILL+Hi: System
voltageExists-Nighttime illumination does not appear for
audio units.
Lo: 0-1
-ExistsBlown multipurpose fuse.
25InputACC (ACCSystem volt-Exists-Screen display does not appear.
power supply)age
-ExistsBlown multipurpose fuse.
26Input+BSystem volt-Exists-Screen display does not appear.
age
-ExistsBlown multipurpose fuse.
27InputVSSHi: System
voltage
Lo: 0-1ExistsExistsAbnormal outside air temperature ap-
pears.
(only diesel-powered vehicles)
28-GND (earth)-Exists-Screen display does not appear.
29, 30------
31-GND-TEMPExistsExistsOutside air temperature does not appear.
32InputILL -ExistsExistsThe display screen can not be dimmed.
33InputFUEL GAUGE-ExistsAbnormal cruising distance appears.
34, 35------
36InputIG1Hi: System
voltageExists-Communication with engine-ECU is im-
possible. Abnormal driving data values
appear.
-ExistsCommunication with engine-ECU is im-
possible. Abnormal driving data values
appear. Blown multipurpose fuse.


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CHASSIS ELECTRICAL -Clock or Center Display54A-61
INSPECTION CHART CLASSIFIED BY TROUBLE SYMPTOMS
Related unitTrouble SymptomInspection pro-
cedure No.Reference
page
Malfunction of center
display, related sen-No display appears after the ignition key is turned to the
ACC position.154A-62
sors, and wiring har-
nesses
Outside air temperature does not appear or abnormal
outside air temperature appears.254A-62
Abnormal vehicle speed is displayed on the service
mode.354A-63
Abnormal driving data are displayed:
D
Abnormal average fuel consumption (momentary
fuel consumption) and average vehicle speed
D
Abnormal cruising distance454A-64
Clock runs fast or slow.554A-64
The display screen is dim.654A-65
Air conditioning display does not apper.754A-66


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CHASSIS ELECTRICAL -Clock or Center Display54A-62
INSPECTION PROCEDURE 1
No display appears after the ignition key is turn to the ACC position.
OK
Measure voltages between D-03 display connector terminal (25),
(26) voltage and earth.
DIgnition switch: ACC
OK:System voltageNGRepair the fuse and wiring harness.
OK
Measure resistance between D-03 display connector terminal (28)
and earth.
OK:approx. 0
WNGRepair the wiring harness.
OK
Repair the center display unit.
Check the following connector: D-03NGRepair
INSPECTION PROCEDURE 2
Outside air temperature does not appear or abnormal outside air temperature appears.

Check the following connector: D-03NGRepair.
NO
Go to inspection procedure 3.
Check the wiring harness between the
Center Display and the outside air tem-
perature sensor.OKReplace the center display unit.OKEnd
NG
Replace the outside air temperature
sensor.NG
Check the wiring harness between the
center display unit and the outside air
temperature sensor, and replace if nec-
essary.
OK
Is a correct outside air temperature dis-
played in the servicemode?YESIs a correct vehicle speed displayed in
the servicemode?YESEnd (no abnormality).
NO

Select “Check of units connected into
the center display” on the service mode.
Does the symbol “AU” appear?NOGo to inspection procedure 7.
YES
Replace the center display unit.
YES
MUT-
IISelf-Diag code
Is A/C diagnosis code No.13 or 14 set?YESCheck the outside air temperature sen-
sor. (Refer to GROUP 55B.)
NO
Is a correct vehicle speed displayed in
the servicemode?NOGo to inspection procedure 3.
NOTE: It is necessary to drive for a while and get accurate temperature in display if you pass a area
in which temperature is much different. It might show high temperature on display in case it is high
around sensor due to high temperature of engine after battery is exchanged, or a display unit is reinstalled.


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CHASSIS ELECTRICAL -Clock or Center Display54A-63
INSPECTION PROCEDURE 3
Abnormal vehicle speed is displayed on the service mode.

OK
NGRepair.
Measure at center display unit connec-
tor D-03.
DDisconnect the connector.
DVoltage between terminal 36 and
body earth.
OK:(Ignition switch: ON)
System voltage.
(Ignition switch: OFF)
0-1VNGCheck the wiring harness between the
center display unit and the junction
block, and repair if necessary.
NG
Check the wiring harness between the
center display unit and the engine-ECU,
and repair if necessary.
Select “Check of units connected into
the center display” on the service mode.
Does the symbol “MU” appear?YES NGDisconnect MUT-
II. Then check vehicle
wiring harnesses.Disconnect connector D-04.
Then check voltage at terminal 5 of that
connector.
DIgnition switch: ON
NG:More than 80% of system volt-
age
OK:Less than that
OK NO
OK
Check the connections between the
center display unit and the engine-ECU.OKReplace the center display unit.
Check the connector: D-04

Measure at center display unit connector D-03.
DDisconnect the connector.
DVoltage between terminal 36 and body earth.
OK:(Ignition switch: ON) System voltage.
(Ignition switch: OFF) 0 - 1 VNGCheck the wiring harness between the center display unit and
the junction block, and repair if necessary.
OK
Measure at center display unit connector D-03 .
DDisconnect the connector.
DVoltage between terminal 27 and body earth.
OK:HI: System voltage.
Lo: 0 - 1VNGCheck the wiring harness between the center display unit and
the vehicle speed sensor, and repair if necessary.
OK
Replace the center display unit.


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CHASSIS ELECTRICAL -Clock or Center Display54A-64
INSPECTION PROCEDURE 4
Abnormal driving data are displayed:
DAbnormal average fuel consumption (momentary fuel consumption) and average vehicle speed
DAbnormal cruising distance
Are the average fuel consumption and average vehicle speed dis-
play correctly?NOGo to inspection procedure 3.1.
YES
Does the vehicle information on displayed on the screen meet
with the actual vehicle?
Is the vehicle type (long or short body) recognized correctly?
(Select “Check of units connected into the center display” and
“Check of vehicle information” on the service mode.)NOReplace the center display unit.
YES
Is remained fuel amount displayed correctly on servicemode?YESEnd (no abnormality).
NO
Measure at center display unit connector D-03.
DDisconnect the connector.
DVoltage between terminal 33 and body earth.
OK:0.1 - 3 VNGCheck the wiring harness between center display unit and the
fuel gauge unit, and repair ifnecessary. (relevant units: Combination
meter, fuel gauge unit)
OK
Replace the center display unit.
NOTE
(1) If the remained fuel amount is so small that the fuel gauge unit can not detect a correct amount,
incorrect cruising range may be displayed.
(2) Fuel consumption is updated each time fuel is supplied. Furthermore, the cruising range depends
on road and driving conditions.
INSPECTION PROCEDURE 5
Clock runs fast or slow.
NGRepair the fuse and wiring harness.
OK
YES
Does it receive a radio station on differ-
ent region where has timelag?YESTurn off the CT function.
NO
Replace the center display unit.
Measure at center display unit connec-
tor D-03.
DIgnition switch: OFF
DVoltage between terminal 26 and
body earth.
OK:System voltage
Is the symbol “CT” displayed?
NO


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CHASSIS ELECTRICAL -Clock or Center Display54A-65
INSPECTION PROCEDURE 6
The display screen is dim.
NOMeasure at center display unit connec-
tor D-03.
DDisconnect the connector.
DVoltage between terminal 24 and
body earth.
OK:0 V (Lighting switch: off)
System voltage (Lighting
switch: ON)NGRepair the fuse and wiring harness.
Is the brightness of the center display
set correctly?NOAdjust the brightness of display on set-
ting mode.
OK
Replace the center display unit.
OK
Replace the center display unit.
YES
Measure at center display unit connec-
tor D-03.
DDisconnect the connector.
DRheostat: max
DVoltage between terminal 32 and
body earth.
OK:Low voltage (0 - 3 V)NGRepair the wiring harness.
Does the brightness of display change
when the lighting switch is on or off?
YES


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CHASSIS ELECTRICAL -Clock or Center Display54A-66
INSPECTION PROCEDURE 7
Air conditioning display is not available.
Measure at center display unit connec-
tor D-03.
DDisconnect the connector.
DVoltage between terminal 36 and
body earth.
OK:System voltage (Ignition
switch: ON)
0 - 1 V (Ignition switch:
OFF)NGCheck the wiring harness between the
center display unit and the junction
block, and repair if necessary.
OK
NO OK
Check theaudio unit.
NG
NG
Repair wiring harness.
OK
OK
Replace the center display unit.
YES
Replace the A/C-ECU.
YES
Refer to GROUP 55 - A/C troubleshoot-
ing.Check the reoccurrence of symptom.OKEND
NG
Replace the center display unit.
Measure at center display unit connec-
tor D-04.
DDisconnect the connector.
DVoltage between terminal 9 and
body earth.
DVoltage between terminal 10 and
body earth.
DVoltage between terminal 19 and
body earth.
OK:Hi:4–5V
Lo:0–1V
Check the the wiring harnesses:
DBetween the center display and
A/C-ECU D-04, D-49
DBetween the center display and
AUDIO D-04, D-49
Check the reoccurrence of symptom.Select “Check of units connected into
the center display” on the service mode.
Does the symbol “AU” appear?
MUT-
IISelf-Diag code
Is the diagnosis code for A/C set?NG
NO


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CHASSIS ELECTRICAL -RV Meter54A-17
Termi-Input/out-
t
Signal sym-
bl
Terminal
lt
Harness problemTrouble symptoms when there is a
hblnal No.
p
put
gy
bolvoltage
(V)Open
circuitshort-cir-
cuit
yp
harness problem
11 - 1 4––––––
15Input/out-
putK (engine
K-LINE
signal)Hi: Sys-
tem volt-
age
Lo:0 - 1ExistsExistsDWiring communication error
DCommunication between the
engine-A/T-ECU hicles> is not possible.
DAbnormal driving information
numerical display
16––––––
17Input/out-
putM-BUSY
(AUDIO)Hi:System
voltage
Lo:0 - 1ExistsExistsDAudio information does not
appear on the screen.
18–SHIELD-
EARTH
(AUDIO)––––
19Input/out-
putM-BUSY
(A/C)Hi:System
voltage
Lo:0 - 1ExistsExistsDAir conditioner information does
not appear on the screen.
DAmbient temperature is not
displayed.
20–SHIELD-
EARTH––––
22 - 21––––––
23InputAmbient
temperature
sensor–ExistsExistsDAmbient temperature is not
displayed.
24InputILL + (Light-
ing switch)Hi:System
voltage
Lo:0 - 1ExistsExistsDoes not illuminate.
25InputACC (ACC
power sup-
l)
System
voltageExists–Screen does not appear. No
operations are possible.
pp
ply)
g
–ExistsBlown multi-purpose fuse
26Input+BSystem
voltageExists–Screen does not appear. No
operations are possible.
g
–ExistsBlown multi-purpose fuse
27InputVSS (Vehicle
speed pulse
signal)Hi:System
voltage
Lo:0 - 1ExistsExistsDAbnormal “Distance km after
replacement” display in mainte-
nance screen
DSwitches which are not
supposed to operate during
driving do operate.
(Example:clock adjustment
screen, maintenance settings,
etc.)
DAmbient temperature display is
abnormally high.
28–Earth–Exists–Screen does not appear.


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