Mitsubishi Outlander XL. Manual — part 442

3.

Disconnect the negative battery cable.

Never use clips to connect the line. Loose
connections (for example, using clips) will lead
to a serious accident because of high current.

4.

Connect a clamp-type DC test ammeter with a
range of 0 - 150 A to the generator "B" terminal
output wire.

NOTE:

The way of disconnecting the generator

output wire and of connecting the ammeter is
possibly not found the problem that the output
current is dropping due to the 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
generator 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.

CHARGING SYSTEM

16a-9

ON-VEHICLE SERVICE

REGULATED VOLTAGE TEST

M11601000011USA0000010000

ZK500349AA00

Battery

CAN communication

Ammeter (clamp-type)

Load

Blue

MB991519

Voltmeter (digital-type)

Yellow

Red

Black

Generator

B

FR

L

S

G

Generator
malfunction light

Combination meter

+

+

ECM

–

–

Required Special Tools:

｠

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

｠

MB991519: Generator Harness Connector

This test determines whether the voltage regulator is
correctly controlling the generator output voltage.

Battery posts, terminals and related accessories
contain lead and lead compounds. WASH HANDS
AFTER HANDLING.

1.

Always be sure to check the following before the
test:

｠

Generator installation

｠

Check to be sure that the battery installed in the
vehicle is fully charged. (Refer to GROUP 54A,
Chassis Electrical - Battery - On-vehicle Service
- Battery Check P.54Aa-2.)

｠

Generator drive belt tension (Refer to GROUP
00, General - Maintenance Service - Drive Belts
(For Generator, and Air Conditioning) (Check) P.
00-58.)

｠

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.

Use the special tool (Generator harness connector:
MB991519) to connect a digital-type voltmeter
between the generator "S" terminal and ground.
(Connect the positive lead of the voltmeter to the "S"
terminal, and then connect the negative lead of the
voltmeter to a secure ground or to the negative
battery terminal.)

5.

Connect a clamp-type DC test ammeter with a
range of 0 - 150 A to the generator "B" terminal
output wire.

6.

Reconnect the negative battery cable.

16a-10

CHARGING SYSTEM

ON-VEHICLE SERVICE

7.

Connect an engine tachometer, or scan tool
MB991958.

8.

Turn the ignition switch to the "ON" position and
check 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 "S" terminal and the
battery positive terminal or malfunctioning
voltmeter.

9.

Check to be sure that all lights and accessories are
off.

10.

Start the engine.

11.

Increase the engine speed to 2,500 r/min.

12.

Read the value displayed on the voltmeter when
the current output by the generator becomes 10 A
or less.

13.

If the voltage reading conforms to the value in the
voltage regulation table, then the voltage regulator
is operating normally.
If the voltage is outside the standard value, there
is a malfunction of the voltage regulator or the
generator (Refer to the following table).

14.

After the test, lower the engine speed to idle.

15.

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

16.

Disconnect the engine tachometer or scan tool
MB991958.

17.

Disconnect the negative battery cable.

18.

Disconnect the ammeter and voltmeter.

19.

Remove the special tool (Generator harness
connector: MB991519), and return the connector
to the original condition.

20.

Connect the negative battery cable.

21.

Run the engine for 10 minutes at an idle.

VOLTAGE REGULATION TABLE

INSPECTION TERMINAL

VOLTAGE REGULATOR AMBIENT
TEMPERATURE [°C (°F)]

STANDARD VALUE (V)

Terminal "S"

-20 (-4)

14.2 - 15.4

20 (68)

13.9 - 14.9

60 (140)

13.4 - 14.6

80 (176)

13.1 - 14.5

WAVE PATTERN CHECK USING AN

OSCILLOSCOPE

M11601000012USA0000010000

MEASUREMENT METHOD

ZK500951

Generator

CH1

AA00

"B" terminal

Connect the oscilloscope special patterns pick-up to the
generator "B" terminal.

CHARGING SYSTEM

16a-11

ON-VEHICLE SERVICE

STANDARD WAVEFORM

Observation Conditions
FUNCTION

SPECIAL PATTERNS

Pattern height

Variable

Variable knob

Adjust while viewing the
wave pattern

Pattern selector

Raster

Engine revolutions

Curb idle speed

ZK600351

0.4

(V)

0.2

0

–0.2

–0.4

Voltage at
generator
"B" terminal

Time

AA00

ZK600352AA00

NOTE:

The voltage waveform of the generator "B" terminal

can undulate as shown at left. This waveform is produced
when the regulator operates according to fluctuations in
the generator load (current), and is normal for the
generator.If the ripple height is abnormally high
(approximately 2 V or more during idling), the wires between
the generator "B" terminal and the battery have broken due
to fuse blowing, etc. The generator is usually operating
properly.

ABNORMAL WAVEFORMS EXAMPLES

NOTE:

The size of the waveform patterns can differ greatly,

depending on the adjustment of the variable knob on the
oscilloscope.

NOTE:

Identification of abnormal waveforms is easier when

there is a large output current (regulator is not
operating). (Waveforms can be observed when the headlights
are illuminated.)

NOTE:

Check the conditions of the generator malfunction

light (illuminated/not illuminated) also, and carry out a
total check.

16a-12

CHARGING SYSTEM

ON-VEHICLE SERVICE