light MITSUBISHI MONTERO 1998 Service Manual

the iron core here.
This pintle hump at Point "E" should occur near the end of
the downward slope, and not afterwards. If it does occur after the
slope has ended and the voltage has stabilized, it is because the
pintle is slightly sticking because of a faulty injector
If you see more than one hump it is because of a distorted
pintle or seat. This faulty condition is known as "pintle float".
It is important to realize that it takes a good digital
storage oscilloscope or analog lab scope to see this pintle hump
clearly. Unfortunately, it cannot always be seen.
Fig. 2: Identifying Voltage Controlled Type Injector Pattern
INTERPRETING A CURRENT CONTROLLED PATTERN
NOTE: Current controlled drivers are also known as "Peak and Hold"

drivers. They typically require injector circuits
with a total leg resistance with less than 12 ohm.
NOTE: This example is based on a constant power/switched ground
circuit.
* See Fig. 3 for pattern that the following text describes.
Point "A" is where system voltage is supplied to the
injector. A good hot run voltage is usually 13.5 or more volts. This
point, commonly known as open circuit voltage, is critical because the
injector will not get sufficient current saturation if there is a
voltage shortfall. To obtain a good look at this precise point, you
will need to shift your Lab Scope to five volts per division.
You will find that some systems have slight voltage
fluctuations here. This could occur if the injector feed wire is also
used to power up other cycling components, like the ignition coil(s).
Slight voltage fluctuations are normal and are no reason for concern.
Major voltage fluctuations are a different story, however. Major
voltage shifts on the injector feed line will create injector
performance problems. Look for excessive resistance problems in the
feed circuit if you see big shifts and repair as necessary.
Point "B" is where the driver completes the circuit to
ground. This point of the waveform should be a clean square point
straight down with no rounded edges. It is during this period that
current saturation of the injector windings is taking place and the
driver is heavily stressed. Weak drivers will distort this vertical
line.
Point "C" represents the voltage drop across the injector
windings. Point "C" should come very close to the ground reference
point, but not quite touch. This is because the driver has a small
amount of inherent resistance. Any significant offset from ground is
an indication of a resistance problem on the ground circuit that needs
repaired. You might miss this fault if you do not use the negative
battery post for your Lab Scope hook-up, so it is HIGHLY recommended
that you use the battery as your hook-up.
Right after Point "C", something interesting happens. Notice
the trace starts a normal upward bend. This slight inductive rise is
created by the effects of counter voltage and is normal. This is
because the low circuit resistance allowed a fast build-up of the
magnetic field, which in turn created the counter voltage.
Point "D" is the start of the current limiting, also known as
the "Hold" time. Before this point, the driver had allowed the current
to free-flow ("Peak") just to get the injector pintle open. By the
time point "D" occurs, the injector pintle has already opened and the
computer has just significantly throttled the current back. It does
this by only allowing a few volts through to maintain the minimum
current required to keep the pintle open.
The height of the voltage spike seen at the top of Point "D"
represents the electrical condition of the injector windings. The
height of this voltage spike (inductive kick) is proportional to the
number of windings and the current flow through them. The more current
flow and greater number of windings, the more potential for a greater
inductive kick. The opposite is also true. The less current flow or
fewer windings means less inductive kick. Typically you should see a
minimum 35 volts.
If you see approximately 35 volts, it is because a zener
diode is used with the driver to clamp the voltage. Make sure the
beginning top of the spike is squared off, indicating the zener dumped
the remainder of the spike. If it is not squared, that indicates the
spike is not strong enough to make the zener fully dump, meaning there
is a problem with a weak injector winding.
If a zener diode is not used in the computer, the spike from

a good injector will be 60 or more volts.
At Point "E", notice that the trace is now just a few volts
below system voltage and the injector is in the current limiting, or
the "Hold" part of the pattern. This line will either remain flat and
stable as shown here, or will cycle up and down rapidly. Both are
normal methods to limit current flow. Any distortion may indicate
shorted windings.
Point "F" is the actual turn-off point of the driver (and
injector). To measure the millisecond on-time of the injector, measure
between points "C" and "F". Note that we used cursors to do it for us;
they are measuring a 2.56 mS on-time.
The top of Point "F" (second inductive kick) is created by
the collapsing magnetic field caused by the final turn-off of the
driver. This spike should be like the spike on top of point "D".
Point "G" shows a slight hump. This is actually the
mechanical injector pintle closing. Recall that moving an iron core
through a magnetic field will create a voltage surge. The pintle is
the iron core here.
This pintle hump at Point "E" should occur near the end of
the downward slope, and not afterwards. If it does occur after the
slope has ended and the voltage has stabilized, it is because the
pintle is slightly sticking. Some older Nissan TBI systems suffered
from this.
If you see more than one hump it is because of a distorted
pintle or seat. This faulty condition is known as "pintle float".
It is important to realize that it takes a good digital
storage oscilloscope or analog lab scope to see this pintle hump
clearly. Unfortunately, it cannot always be seen.
Fig. 3: Identifying Current Controlled Type Injector Pattern

REAR WIPER ARM ADJUSTMENT
NOTE: Diamante, Galant and Mirage are not equipped with rear
wipers.
Ensure wiper motor is in park position. Position wiper arm
and blade assembly so tip of blade is specified distance from edge of
window. See REAR WIPER ADJUSTMENT SPECIFICATIONS table.
REAR WIPER ADJUSTMENT SPECIFICATIONS TABLE









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Model In. (mm)
Eclipse .............................. 4.98-5.38 (125-135)
Montero & Montero Sport ................ 2.56-2.95 (65-75)
3000GT ............................................... ( 1)
( 1) - Position blade tip along ceramic edge of window.









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COMPONENT TESTS
* PLEASE READ THIS FIRST *
NOTE: For headlight washer switch testing on Montero,
see STEERING COLUMN SWITCHES article.
WASHER MOTOR TEST (FRONT & REAR)
1) Ensure washer reservoir fluid is at proper level. Turn
ignition switch to ON position. Press washer button on wiper/washer
switch. If fluid does not spray on windshield, turn ignition off.
Check for plugged washer hoses from washer reservoir to windshield
nozzle. Repair as necessary.
2) If washer hoses are not plugged, disconnect washer motor
electrical connector. Check for poor connection or connector damage.
Repair as necessary. If connector is okay, connect battery power to
washer motor terminals. Washer motor should operate. Replace motor as
necessary.
FRONT WIPER MOTOR TEST
Checking Wiper Motor Operation
Disconnect wiring connector from wiper motor. Connect battery
voltage to wiper motor connector as shown, and ensure wiper motor
operates at low and high speeds. See Fig. 1 or 2. Replace motor as
necessary.
Checking Automatic Stop
1) Operate wiper motor at low speed. See Fig. 1 or 2.
Disconnect battery voltage during operation to stop motor.
2) Using a jumper wire, connect terminals as shown. See
Fig. 1 or 2. Connect 12 volts to indicated terminal, and ground wiper
motor bracket. Ensure wiper arm is correctly parked. Replace motor as
necessary.

Eclipse
1) Remove wiper switch from instrument panel and disconnect
wiper switch wiring connector. Place wiper switch in OFF position.
Continuity should exist between terminals No. 5 and 6. See Fig. 12.
Place wiper switch in LO position. Continuity should exist between
terminals No. 6 and 7.
2) Place wiper switch in INT position. Continuity should
exist between terminals No. 3 and 7, and between terminals No. 5 and
6. Depress washer switch. Continuity should exist between terminals
No. 7 and 8. Continuity between terminals No. 1 and 4 should exist in
all positions (light circuit). Replace wiper switch if continuity is
not as specified.
Fig. 12: Identifying Rear Wiper Switch & Relay Terminals
Courtesy of Mitsubishi Motor Sales of America
Montero & Montero Sport
Remove lower column cover. Remove upper column cover. Loosen
screws indicated by arrow in illustration. See Fig. 13. Remove rear
wiper/washer switch. Operate switch and check continuity according to
illustration. See Fig. 13.

1) Remove wiper switch from instrument panel and disconnect
wiper switch. Place wiper switch in OFF position. Continuity should
exist between terminals No. 4 and 5. See Fig. 12. Place wiper switch
in ON position. Continuity should exist between terminals No. 5 and 6.
2) Place wiper switch in INT position. Continuity should
exist between terminals No. 4 and 5, and between terminals No. 7 and
8. Depress washer switch. Continuity should exist between terminals
No. 2 and 6. Continuity between terminals No. 1 and 3 should exist in
all positions (light circuit).
REMOVAL & INSTALLATION
FRONT WIPER MOTOR
Removal & Installation
Remove wiper motor bolts. Pull motor out slightly. Disconnect
wiper linkage from motor assembly and remove motor. To install,
reverse removal procedure.
FRONT WIPER SWITCH
NOTE: Front wiper switch is part of combination switch on steering
column. See STEERING COLUMN SWITCHES article.
REAR WIPER MOTOR
Removal & Installation
Remove wiper blade and arm assembly. Remove tailgate trim, 2
bolts and wiper motor. To install, reverse removal procedure. Ensure
grommet is in good condition.
REAR WIPER SWITCH
Removal & Installation
Pry rear wiper switch from instrument panel and disconnect
wiper switch wiring connector. To install switch, reverse removal
procedure.
WIRING DIAGRAMS

Fig. 21: Wiper/Washer System Wiring Diagram (Montero - Headlight
Washers)