Mitsubishi Outlander GS45X. Manual — part 527

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-7

SPECIAL TOOL

M1161000600787

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991958
Scan tool (M.U.T.-III sub
assembly)

A: MB991824

Vehicle communication
interface (V.C.I.)

B: MB991827

M.U.T.-III USB cable

C: MB991910

M.U.T.-III main harness A
(Vehicles with CAN
communication system)

D: MB991911

M.U.T.-III main harness B
(Vehicles without CAN
communication system)

E: MB991914

M.U.T.-III main harness C
(for Chrysler models only)

F: MB991825

M.U.T.-III measurement
adapter

G: MB991826

M.U.T.-III trigger harness

MB991824-KIT
NOTE: M.U.T.-III Trigger
Harness is not necessary
when pushing V.C.I.
ENTER key.

Checking of engine
speed

CAUTION

For vehicles with CAN
communication, use
M.U.T.-III main harness
A to send simulated
vehicle speed. If you
connect M.U.T.-III main
harness B instead, the
CAN communication
does not function
correctly.

MB991519
Generator harness
connector

MIT530
Micrd 530 charging
system tester.

Checking of generator
("S" terminal voltage)

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

A

B

C

D

E

F

G

DO NOT USE

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-8

ON-VEHICLE SERVICE

GENERATOR OUTPUT LINE VOLTAGE DROP TEST

M1161000901532

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

This test determines whether the wiring from the
generator "B" terminal to the positive battery terminal
(including the fusible link) is in good condition or not:

WARNING

Battery posts, terminals and related acces-
sories contain lead and lead compounds.
WASH HANDS AFTER HANDLING.

1. Always be sure to check the following before the

test.

• Generator installation

• Generator drive belt tension (Refer to GROUP

00, General

− Maintenance Service − Drive Belts

(For Generator, Water Pump, Power Steering Oil
Pump) (Check Condition)

P.00-74

.)

• Fusible link

• Abnormal noise from the generator while the

engine is running.

2. Turn the ignition switch to the "LOCK" (OFF)

position.

3. Disconnect the negative battery cable.
4. Connect a clamp-type DC test ammeter to the

generator "B" terminal output wire.
NOTE: Disconnecting the generator output wire
and connecting the ammeter may not thoroughly
diagnose an alternator output line resistance
increase problem because of an insufficient con-
nection between terminal "B" and the output wire.

5. Connect a digital-type voltmeter between the

generator "B" terminal and the positive battery
terminal. (Connect the positive lead of the
voltmeter to the "B" terminal, and then connect the
negative lead of the voltmeter to the positive
battery cable.)

6. Reconnect the negative battery cable.
7. Connect an engine tachometer or scan tool

MB991958.

8. Leave the hood open.
9. Start the engine.

AK700033 AB

Generator

Ammeter
(Clamp-type)

Voltmeter
(Digital-type)

"B" terminal

Battery

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-9

10.With the engine running at 2,500 r/min, turn the

headlights and other lights on and off to adjust the
generator load so that the value displayed on the
ammeter is slightly above 30 A.
Read the voltmeter. Voltage reading at or below
limit value means voltage drop between generator
and battery is OK.

Limit value: maximum 0.3 V

NOTE:
When the generator output is high and the value
displayed on the ammeter does not decrease to
30 A, set the value to 40 A. Read the value dis-
played on the voltmeter at this time.
In this case the limit value becomes maximum 0.4
V.
Adjust the engine speed by gradually decreasing
it until the value displayed on the ammeter is 30
A. Take a reading of the value displayed on the
voltmeter at this time.

11.If the value displayed on the voltmeter is above

the limit value, there is probably a malfunction in
the generator output wire. Check the wiring
between the generator "B" terminal and the
positive battery terminal (including fusible link).
If a terminal is not sufficiently tight or if the
harness has become discolored due to
overheating, repair and then test again.

12.After the test, run the engine at idle.
13.Turn off all lights and turn the ignition switch to the

"LOCK" (OFF) position.
NOTE: Vehicles for Canada, the headlight, tail-
light, etc. remain lit even when the lighting switch
is in "OFF" position.

14.Disconnect the engine tachometer or scan tool

MB991958.

15.Disconnect the negative battery cable.
16.Disconnect the ammeter and voltmeter.
17.Connect the negative battery cable.
18.Run the engine for 10 minutes at an idle.

OUTPUT CURRENT TEST

M1161001001639

AK700034

CAN communication

Genetator

Ammeter (clamp-type)

Voltmeter

ECM

Load

B

FR

L

S

G

Generator
malfunction light

Battery

+

AB

–

Combination meter

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-10

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

This test determines whether the generator outputs
normal current. For best results, use a charging sys-
tem tester. If not available, follow the steps below.

WARNING

Battery posts, terminals and related acces-
sories contain lead and lead compounds.
WASH HANDS AFTER HANDLING.

1. Before the test, always be sure to check the

following.

• Generator installation

• Battery (Refer to GROUP 54A, Chassis Electrical

− Battery − On-vehicle Service − Battery Check

P.54A-7

.)

NOTE: The battery to be used should be slightly
discharged. The load in a fully-charged battery
will be insufficient and the test may not be able to
be carried out correctly.

• Generator drive belt tension (Refer to GROUP

00, General

− Maintenance Service − Drive Belts

(For Generator, Water Pump, Power Steering Oil
Pump) (Check Condition)

P.00-74

.)

• Fusible link

• Abnormal noise from the generator while the

engine is running.

2. Turn the ignition switch to the "LOCK" (OFF)

position.

3. Disconnect the negative battery cable.
4. Connect a clamp-type DC test ammeter to the

generator "B" terminal output wire.
NOTE: Disconnecting the generator output wire
and connecting the ammeter may not thoroughly
diagnose an output current drop problem because
of an insufficient connection between terminal "B"
and the output wire.

5. Connect a voltmeter with a range of 0

− 20 V

between the generator "B" terminal and ground.
(Connect the positive lead of the voltmeter to the
"B" terminal, and then connect the negative lead
of the voltmeter to ground.)

6. Connect the negative battery cable.
7. Connect an engine tachometer or scan tool

MB991958.

8. Leave the hood open.

9. Check to be sure that the reading on the voltmeter

is equal to the battery positive voltage.
NOTE: If the voltage is 0 V, the cause is probably
an open circuit in the wire or fusible link between
the generator "B" terminal and the battery positive
terminal or malfunctioning voltmeter.

10.After turning on the headlights, start the engine.

NOTE: Because the current from the battery will
soon drop after the engine is started, step 11
should be carried out as quickly as possible in
order to obtain the maximum current output value.

11.Immediately after setting the headlights to high

beam and turning the heater blower switch to the
highest position, increase the engine speed to
2,500 r/min and read the maximum current output
value displayed on the ammeter.

Limit value: 70 % of nominal current output

NOTE: For the nominal current output, refer to the
Generator Specifications.
NOTE: The current output value will depend on
the electrical load and the temperature of the gen-
erator body.
NOTE: If the electrical load is small while testing,
the specified level of current may not be output
even though the generator is normal. In such
cases, increase the electrical load by leaving the
headlights turned on for some time to discharge
the battery or by using the lighting system in
another vehicle, and then test again.
NOTE: The specified level of current also may not
be output if the temperature of the generator body
or the ambient temperature is too high. In such
cases, cool the generator and then test again.

12.The reading on the ammeter should be above the

limit value. If the reading is below the limit value
and the generator output wire is normal, remove
the generator from the engine and check the
generator.

13.Run the engine at idle speed after the test.
14.Turn the ignition switch to the "LOCK" (OFF)

position.

15.Disconnect the engine tachometer or scan tool

MB991958.

16.Disconnect the negative battery cable.
17.Disconnect the ammeter and voltmeter.
18.Connect the negative battery cable.
19.Run the engine for 10 minutes at an idle.