2000 MITSUBISHI MONTERO check engine

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer <4D56>54A-17
Inspection procedure 2
The engine does not start.
(The engine cranks but does not fire.)
Probable cause
If the fuel injection does not operate, the cause is probably a problem
with the immobilizer-ECU, or it could also be a problem with the
diesel fuel system. If an attempt has been made to start the engine
with a key that has not been properly registered, the above symptom
is a sign of normal operation.D
Malfunction of diesel fuel system
D
Malfunction of immobilizer-ECU
NGBattery check (P.54A-4)
YES
NOTo Chart Classified by Diagnosis Codes (Refer to P.54A-14.)Is a normal diagnosis code output from the immobilizer-ECU?
OK
Voltage check during cranking
OK:8V or higher
NG
Immobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
Check the trouble symptoms.
NG
To inspection procedures if the enginedoes not fire
(Refer to GROUP 13B, 13C - Troubleshooting.)
OK
Check the trouble symptoms.
NG
OK
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
OK
Check the trouble symptoms.
NG
Repair
Check the harness between the immobilizer-ECU and the fuel
cut valve controller.
Repair
Check the following connectors:D-133, D-13, B-03


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CHASSIS ELECTRICAL-Combination Meter CHASSIS ELECTRICAL-Combination Meter54A-25
CHART CLASSIFIED BY TROUBLE SYMPTOMS
Trouble SymptomInspection procedure
No.Reference page
Speedometer does not operate. (Other meters and gauges
operate.)154A-25
Tachometer does not operate. (Other meters and gauges
operate.)254A-26
Fuel gauge does not operate. (Other meters and gauges
operate.)354A-27
Engine coolant temperature gauge does not operate.
(Other meters and gauges operate.)454A-28
None of the meters and gauges operate.554A-29
INSPECTION PROCEDURES FOR EACH TROUBLE SYMPTOM
Inspection procedure 1
Speedometer does not operate. (Other meters and gauges
operate.)
Probable cause
The cause is probably a malfunction of the vehicle speed sensor
input system.D
Malfunction of vehicle speed sensor
D
Malfunction of harness or connector
D
Malfunction of speedometer
D
Malfunction of printed circuit board
NO
MUT-
IISelf-Diag Code
Is MPI, GDI or DIESEL diagnosis code No. 24 output?YESVehicle speed sensor circuit check (Refer to inspection
procedure 6 on P.54A-29.)
OK
Replace the combination meter case.
NG
Check the trouble symptoms.
NGCheck the following connectors:D-01, D-222, E-13, E-113,
C-09Repair
NG
Check the trouble symptoms.
Replace the speedometer.


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CHASSIS ELECTRICAL-Combination Meter54A-26
Inspection procedure 2
Tachometer does not operate.(Other meters and gauges
operate.)
Probable cause
The cause is probably that the ignition signal is not being input from
the engine, or that there is a malfunction of the meter power supply
or earth circuit.D
Malfunction of tachometer
D
Malfunction of harness or connector
D
Malfunction of printed circuit board
OK
NG
Replace the combination meter case.
OK
Check the trouble symptoms.
NO
MUT-
IISelf-Diag Code
Is MPI, GDI or DIESEL diagnosis code No. 44 output?YESCode No. 44 Ignition coil and power transistor unit system
(Refer to GROUP 13A - Troubleshooting.)
NG
Replace the tachometer.
NG
NG
Repair RepairCheck the harness between the combination meter and the
engine-ECU.
OK:Continuity
Check the trouble symptoms.
Check the following connectors:
<6G74-A/T>D-01, D-33, E-13, B-04, D-120,
<6G74-M/T>D-01, D-33, E-13, B-04, D-117,
<4M41>D-01, D-33, E-13, D-112,
<4D56>D-01, D-33, E-13, B-07, B-07-1


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CHASSIS ELECTRICAL-Combination Meter54A-29
Inspection procedure 5
None of the meters and gauges operate.
Probable cause
If the indicators and warning lamps are normal, then the harness
from the power supply (IG1) to the combination meter is normal.D
Malfunction of printed circuit board
D
Malfunction of harness or connector
NGRepair NG
OK
Check the trouble symptoms.Repair
OK
Check the harness between the combination meter and body
earth.
Check the following connectors:D-27, D-233, D-218, D-01,
D-03
NG
Check the harness between fusible link No. 2 and the
combination meter.
Replace the combination meter case.
Inspection procedure 6
Vehicle speed sensor check
The vehicle speed sensor is used by the speedometer, engine-ECU and A/T-ECU.
NG
Check the harness between the vehicle speed sensor and
body earth, and repair if necessary.
RepairNG
OK
Check the trouble symptoms.NG
Check the harness between the vehicle speed sensor and
multipurpose fuse No. 13, and repair if necessary.
RepairNG
OK
Check the trouble symptoms.
Check the following connectors:D-213, E-115, C-09
(3)NG
(2)NG
Check the following connectors:C-09
NG
Check the harness between the vehicle speed sensor and the
combination meter, and repair if necessary.
RepairNG
OK
Check the trouble symptoms.
OK
Measure at vehicle speed sensor connector C-09.
DDisconnect the connector and measure at the harness
side.
(1) Voltage between terminal 3 and earth
OK:4.5 V or higher
(2) Continuity between terminal 2 and earth
OK:Continuity
(3) Voltage between terminal 1 and earth
OK:System voltage(1)NGCheck the following connectors:D-01, D-222, E-13, E-113,
C-09
Vehicle speed sensor check (Refer to P.54A-33.)NG
Replace
NOTE
If the trouble symptoms cannot be eliminated by the above checks, there is probably a short-circuit at
the vehicle speed sensor output side (harness, speedometer, engine-ECU or A/T-ECU), and so this should
be checked.


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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-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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SWS -Troubleshooting54B-45
Inspection Procedure P-6
Rear fog lamp switch signal is not sent to the ETACS-ECU.Probable cause
The rear foglampswitch input signal is used to operate the rear fog lamp. If
the signal fails, rear foglampwill not work normally.DMalfunction of fog lampswitch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between foglampswitch and body earth.
OK
NG
Repair
NG
NG
Repair
OK
Replace the ETACS-ECU.
Check the harness wire between foglampswitch and ETACS-ECU.
OK
Check trouble symptoms.
Check the following connectors:
D-141, D-226
OK
Check trouble symptoms.
Check the following connectors:
D-141, D-30Measure at fog lampswitch connector D-141.
DDisconnect connector and measure at harness side.
DContinuity between terminal 6 and body earth.
OK:Continuity
Check the rear foglampswitch. (Refer to GROUP 54A – Fog
Lamp.)
Inspection Procedure P-7
Back-up lamp switch signal is not sent to the ETACS-ECU.
Probable cause
The back-uplampswitch input signal is used to operate the rear wiper. If the
signal is an error, the rear wiper will not operate consecutively twice when the
rear wiper is on and the shift lever is moved to R position.DMalfunction of back-uplampswitch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between back-uplampswitch and ignition
switch (IG1).
OK
NG
Repair
NG
NG
Repair
OK
Replace the ETACS-ECU.
OK
Check trouble symptoms.
Check the following connectors:
C-18, E-115, D-32, D-213, D-208
Check the harness wire between back-uplampswitch and ETACS-
ECU.
OK
Check trouble symptoms.
Check the following connectors:
C-18, E-113, D-128 , E-13, D-33 drive vehicles>, D-226
Measure at back-uplampswitch connector C-18.
DDisconnect connector and measure at harness side.
DTurn the ignition switch to ON position.
DVoltage between terminal 2 and body earth.
OK:System voltage
Check the back-uplampswitch.


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