Mitsubishi Grandis. Manual — part 644

ON-VEHICLE SERVICE

ENGINE LUBRICATION

12-5

CAUTION

Since sealant is applied to the thread of oil
pressure switch, take care not to damage the oil
pressure switch when removing it.
2. Use the special tool Oil pressure switch wrench

(MD998054) to remove the oil pressure switch.
NOTE: Remove the terminal of oil pressure switch
where the special tool Oil pressure switch wrench
(MD998054) is not fitted.

3. Install the oil pressure gauge.

NOTE: Use an adapter of PT 1/8 thread.

4. Run the engine to warm it.
5. After the engine has been warmed up, check that

oil pressure is within the standard value.

Standard value:

At idle: 29 kPa or more
At 3,500 r/min: 294

− 686 kPa

6. Remove the oil pressure gauge.

7. Apply the specified sealant to the thread of oil

pressure switch.

Specified sealant: 3M ATD Part No. 8660 or
equivalent

CAUTION

Do not start the engine within one hour after the
oil pressure switch has been installed.
8. Use the special tool Oil pressure switch wrench

(MD998054) to tighten the oil pressure switch to
the specified torque.

Tightening torque: 19

± 3 N⋅m

AK300026AC

Oil pressure switch

AKX00294

MD998054

AD

AKX00295AD

AKX00294

MD998054

AD

16-1

GROUP 16

ENGINE

ELECTRICAL

CONTENTS

CHARGING SYSTEM . . . . . . . . . . . .

16-2

GENERAL INFORMATION. . . . . . . . . . . . .

16-2

SERVICE SPECIFICATIONS . . . . . . . . . . .

16-3

SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . .

16-4

ON-VEHICLE SERVICE . . . . . . . . . . . . . . .

16-5

ALTERNATOR OUTPUT LINE VOLTAGE DROP
TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16-5

OUTPUT CURRENT TEST. . . . . . . . . . . . .

16-6

REGULATED VOLTAGE TEST . . . . . . . . .

16-8

WAVEFORM CHECK USING AN OSCILLOSCOPE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16-9

ALTERNATOR ASSEMBLY . . . . . . . . . . . .

16-12

REMOVAL AND INSTALLATION . . . . . . . .

16-12

DISASSEMBLY AND REASSEMBLY . . . .

16-13

INSPECTION . . . . . . . . . . . . . . . . . . . . . . .

16-15

STARTING SYSTEM . . . . . . . . . . . . .

16-16

GENERAL INFORMATION. . . . . . . . . . . . .

16-16

SERVICE SPECIFICATIONS . . . . . . . . . . .

16-17

STARTER MOTOR ASSEMBLY. . . . . . . . .

16-18

REMOVAL AND INSTALLATION . . . . . . . .

16-18

STARTER MOTOR ASSEMBLY INSPECTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16-19

DISASSEMBLY AND REASSEMBLY . . . . .

16-21

INSPECTION . . . . . . . . . . . . . . . . . . . . . . .

16-22

IGNITION SYSTEM. . . . . . . . . . . . . . .

16-24

GENERAL INFORMATION . . . . . . . . . . . . .

16-24

SERVICE SPECIFICATIONS . . . . . . . . . . .

16-26

SPECIAL TOOL. . . . . . . . . . . . . . . . . . . . . .

16-26

ON-VEHICLE SERVICE . . . . . . . . . . . . . . .

16-26

IGNITION COIL (WITH BUILT-IN POWER

TRANSISTOR) CHECK. . . . . . . . . . . . . . . .

16-26

SPARK PLUG CHECK AND CLEANING . .

16-26

CAMSHAFT POSITION SENSOR CHECK .

16-27

CRANK ANGLE SENSOR CHECK . . . . . . .

16-27

DETONATION SENSOR CHECK . . . . . . . .

16-27

IGNITION COIL . . . . . . . . . . . . . . . . . . . . . .

16-27

REMOVAL AND INSTALLATION . . . . . . . .

16-27

CAMSHAFT POSITION SENSOR . . . . . . .

16-28

REMOVAL AND INSTALLATION . . . . . . . .

16-28

CRANKSHAFT POSITION SENSOR . . . . .

16-28

REMOVAL AND INSTALLATION . . . . . . . .

16-28

DETONATION SENSOR . . . . . . . . . . . . . . .

16-29

REMOVAL AND INSTALLATION . . . . . . . .

16-29

CHARGING SYSTEM

ENGINE ELECTRICAL

16-2

CHARGING SYSTEM

GENERAL INFORMATION

M1161000100425

The charging system uses the alternator output to
keep the battery charged at a constant level under
various electrical loads.

OPERATION

Rotation of the excited field coil generates AC
voltage in the stator.
This alternating current is rectified through diodes to
DC voltage having a waveform shown in the
illustration.

The average output voltage fluctuates slightly with
the alternator load condition.
When the ignition switch is turned on, current flows in
the field coil and initial excitation of the field coil
occurs.
When the stator coil begins to generate power after
the engine is started, the field coil is excited by the
output current of the stator coil.
The alternator output voltage rises as the field
current increases and it falls as the field current
decreases. When the battery voltage (alternator "S"
terminal voltage) reaches a regulated voltage of
approximately 14.4 V, the field current is cut off.
When the battery voltage drops below the regulated
voltage, the voltage regulator regulates the output
voltage to a constant level by controlling the field
current.
In addition, when the field current is constant, the
alternator output voltage rises as the engine speed
increases.

SYSTEM DIAGRAM

AKX00183

Voltage

Time

Approximately
14.4 V

AC

AK304842

Alternator

B

Stator
coil

Engine-ECU

<M/T> or

Engine-A/T-ECU

<A/T>

G
S
L
FR

Voltage
regulator

Ignition
switch-IG

Battery

Field coil

+

-

AB

Charging
warning lamp

Combination meter

CHARGING SYSTEM

ENGINE ELECTRICAL

16-3

ALTERNATOR SPECIFICATIONS

SERVICE SPECIFICATIONS

M1161000300377

Item

Specification

Type

Battery voltage sensing

Rated output V/A

12/110

Voltage regulator

Electronic built-in type

Item

Standard value

Limit

Alternator output line voltage drop (at 30 A) V

−

maximum 0.3

Regulated voltage ambient
temperature at voltage regulator V

−20°C

14.2

− 15.4

−

20

°C

13.9

− 14.9

−

60

°C

13.4

− 14.6

−

80

°C

13.1

− 14.5

−

Output current

−

70 % of normal output current