Gauge MITSUBISHI 380 2005 Workshop Manual

90-1
GROUP 90
CIRCUIT DIAGRAMS
CONTENTS
HOW TO READ CIRCUIT DIAGRAMS90-3
JUNCTION BLOCK . . . . . . . . . . . . . .90-9
JOINT CONNECTOR . . . . . . . . . . . . .90-11
CENTRALISED JUNCTION . . . . . . . .90-12
POWER DISTRIBUTION SYSTEM . .90-18
STARTING SYSTEM . . . . . . . . . . . . .90-21
IGNITION SYSTEM . . . . . . . . . . . . . .90-22
CHARGING SYSTEM . . . . . . . . . . . .90-23
MULTIPOINT FUEL INJECTION (MPI)
SYSTEM . . . . . . . . . . . . . . . . . . . . . . .90-24
COOLING SYSTEM . . . . . . . . . . . . . .90-29
INVECS-II 5A/T . . . . . . . . . . . . . . . . .90-30
HEADLAMPS . . . . . . . . . . . . . . . . . . .90-35
TAIL LAMP, POSITION LAMP, AND
LICENCE PLATE LAMP . . . . . . . . . .90-38
FOG LAMPS . . . . . . . . . . . . . . . . . . .90-41FRONT DOME LAMP, REAR DOME LAMP,
TRUNK LAMP AND IGNITION KEY HOLE
ILLUMINATION LAMP . . . . . . . . . . . .90-44
GLOVE BOX LAMP . . . . . . . . . . . . . .90-48
VANITY MIRROR LAMP. . . . . . . . . . .90-49
TURN-SIGNAL LAMP AND HAZARD
WARNING LAMP . . . . . . . . . . . . . . . .90-50
BACKUP LAMP . . . . . . . . . . . . . . . . .90-54
STOPLAMP. . . . . . . . . . . . . . . . . . . . .90-55
HORN . . . . . . . . . . . . . . . . . . . . . . . . .90-56
METER AND GAUGE . . . . . . . . . . . . .90-57
BRAKE WARNING LAMP, OIL
PRESSURE WARNING LAMP, FUEL
WARNING LAMP . . . . . . . . . . . . . . . .90-60
POWER WINDOWS . . . . . . . . . . . . . .90-62
CENTRAL DOOR LOCKING
SYSTEM . . . . . . . . . . . . . . . . . . . . . . .90-64
Continued on next page

METER AND GAUGE
CIRCUIT DIAGRAMS90-57
METER AND GAUGEM1901003501113

METER AND GAUGE
CIRCUIT DIAGRAMS90-58

METER AND GAUGE
CIRCUIT DIAGRAMS90-59
METER AND GAUGE (CONTINUED)

AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-88
STEP 21. Check the A/C pressure sensor operation.
(1) Assemble a gauge manifold on the high pressure service
valve.
(2) Disconnect the A/C pressure sensor connector and connect
special tool test harness MB991658 as shown in the
illustration.
(3) Turn ON the engine and then turn ON the air conditioner
switch.
(4) At this time, check to see that the voltage of A/C pressure
sensor terminal No. 2 reflects the specifications of the
figure.
NOTE: The allowance shall be defined as
5%.
Q: Is the A/C pressure sensor operating properly?
YES : Go to Step 22.
NO : Replace the A/C pressure sensor. Check that the air
conditioning works normally.
STEP 22. Check the refrigerant level.
Use the refrigerant recovery station to remove all of the refrig-
erant, and then calculate the amount of the refrigerant and
charge it.
Q: Is the refrigerant level correct?
YES : Go to Step 23.
NO : Correct the refrigerant level (Refer to On-vehicle
Service P.55-144). Check that the air conditioning
works normally.
STEP 23. Replace the A/C-ECU.
Q: Does the A/C operate normally?
YES : The procedure is complete.
NO : Replace the powertrain control module. Check that
the air conditioning works normally.

AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-105
STEP 2. Using scan tool , check data list item 61: A/C
pressure sensor.
To prevent damage to scan tool , always turn the ignition
switch to the "LOCK" (OFF) position before connecting or
disconnecting scan tool .
(1) Connect scan tool to the data link connector.
(2) Assemble a manifold gauge onto the high pressure service
valve.
(3) Turn ON the engine and then turn ON the air conditioner
switch.
(4) Set scan tool to the data reading mode for item 61: A/C
pressure sensor.
Check that the refrigerant pressure matches the dis-
played value on the scan tool.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor within the specified range?
YES : Go to Step 7.
NO : Go to Step 3.

AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-107
STEP 4. Check the A/C pressure sensor.
(1) Assemble a gauge manifold on the high pressure service
valve.
(2) Disconnect the A/C pressure sensor connector and connect
special tool test harness MB991658 as shown in the
illustration.
(3) Turn ON the engine and then turn ON the air conditioner
switch.
(4) At this time, check to see that the voltage of A/C pressure
sensor terminal No. 2 reflects the specifications of the
figure.
NOTE: The allowance shall be defined as
5%.
Q: Is the A/C pressure sensor in good condition?
YES : Go to Step 5.
NO : Replace the A/C pressure sensor. Check that the air
conditioning works normally.

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-141
ON-VEHICLE SERVICE
REFRIGERANT LEVEL TESTM1552008400408
Use the refrigerant recovery station to remove all of the refrig-
erant, and then calculate the amount of the refrigerant and
charge it.
A/C COMPRESSOR CLUTCH TESTM1552019900032
1. Disconnect the air conditioning compressor clutch connector
to the air conditioning compressor clutch.
2. Connect positive battery voltage directly to the connector for
the air conditioning compressor clutch.
3. If the air conditioning compressor clutch is normal, there will
be a "click." If the pulley and armature do not make contact
("no click"), there is a malfunction.
SIMPLE INSPECTION OF THE A/C PRESSURE
SENSOR
M1552014700118
1. Assemble a gauge manifold on the high pressure service
valve.
2. Disconnect the A/C pressure sensor connector and connect
special tool test harness MB991658 as shown in the illustra-
tion.
3. Turn ON the engine and then turn ON the air conditioner
switch.

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-143
PERFORMANCE TEST M1552001400526
The vehicles to be tested should be parked out of direct sun-
light.
1. Close the high and low-pressure valve of the gauge
manifold.
2. Connect the charging hose (blue) to the low-pressure valve
and connect the charging hose (red) to the high-pressure
valve of the gauge manifold.
3. Install the quick joint (for low-pressure) to the charging hose
(blue), and connect the quick joint (for high-pressure) to the
charging hose (red).
To connect the quick joint, press section A firmly
against the service valve until a click is heard.
When connecting, run your hand along the hose while
pressing to ensure that there are no bends in the hose.
4. Connect the quick joint (for low-pressure) to the
low-pressure service valve and connect the quick joint (for
high-pressure) to the high-pressure service valve.
NOTE: The high-pressure service valve is on the A/C pipe
and the low-pressure service valve is on the suction hose.
5. Start the engine.
6. Set the A/C controls as follows:
A/C switch: A/C ON position
Mode selection: FACE position
Temperature control: MAXIMUM COOLING position
Air selection: RECIRCULATION position
Blower switch: Maximum air volume
7. Adjust engine speed to 1,500 r/min with A/C clutch engaged.
8. Engine should be warmed up with doors and windows
closed.
9. Insert a thermometer in the center air outlet and operate the
engine for 20 minutes.
NOTE: If the A/C clutch cycles, take the reading before the
clutch disengages.
10.Note the discharge air temperature.
PERFORMANCE TEMPERATURE CHART
GARAGE AMBIENT AIR TEMPERATURE C
(
F)20 (68) 25 (77) 30 (86) 35 (95)
Discharge air temperature
C (F) 1 (34) 6 (43)
Compressor high pressure kPa (psi) 1275 (185)
1863 (270)
Compressor low pressure kPa (psi) 49 (7.1)
294 (42.7)

ENGINE COOLING DIAGNOSIS
ENGINE COOLING14-4
INSPECTION PROCEDURE 2: Engine Overheating
DIAGNOSIS
STEP 1. Remove the radiator cap and check for coolant
contamination.
Q: Is the coolant contaminated with rust and oil?
YES : Replace it. Refer to P.14-27.
NO : There is no action to be taken. Go to Step 2.
STEP 2. Check the radiator cap valve opening pressure.
NOTE: Be sure that the cap is clean before testing. Rust or
other foreign material on the cap seal will cause an improper
reading.
(1) Use a cap adapter to attach the cap to the tester.
(2) Increase the pressure until the gauge indicator stops
moving.
Minimum limit: 83 kPa (12 psi)
Standard value: 93
123 kPa (14 18 psi)
Q: Does the reading remain at or above the minimum limit?
YES : Go to Step 3.
NO : Replace the radiator cap. Then go to Step 5.
STEP 3. Check thermostat operation.
Refer to 38.
Q: Does the thermostat operate correctly?
YES : Go to Step 4.
NO : Replace the thermostat, then go to Step 5.
STEP 4. Check the drive belt for slippage or damage.
Refer to GROUP 00, Maintenance Service
Drive Belts
(Check Condition). <3.8L Engine>39 .
Q: Is the drive belt loose or damaged?
YES : Adjust or replace the drive belt, then go to Step 5.
NO : There is no action to be taken.
STEP 5. Retest the system.
Check the engine coolant temperature.
Q: Is the engine coolant temperature abnormally high?
YES : Return to Step 2.
NO : The procedure is complete.