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2004 STARTING & CHARGING SYSTEMS
Generators & Regulators - Endeavor
DESCRIPTION The charging system charges the battery with the generator output to keep the
battery charged at a constant level during varying electrical load. 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. The average
output voltage fluctuates slightly with the generator 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 generator output voltage rises as the field current increases and it falls as
the field current decreases. When the battery positive voltage (generator S terminal
voltage) reaches a regulated voltage of approximately 14.4V, the field current is cut
off. When the battery positive 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 generator output
volta
ge rises as the en
gine s
peed increases. See Fig. 1
or Fig. 2
.
NOTE: See appropriate SELF DIAGNOSTICS article in ENGINE
PERFORMANCE to properly diagnose charging system.
2004 Mitsubishi Endeavor Limited
2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor
2004 Mitsubishi Endeavor Limited
2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor
Page 1278 of 3870
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 RPM
and read the maximum current output value displayed on the ammeter. Limit
value: 70 percent of nominal current output.
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. REGULATED VOLTAGE TEST Required special tools:
MB991958: Scan Tool MUT
-III Sub Assembly.
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.
2004 Mitsubishi Endeavor Limited
2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor
Page 1774 of 3870
7. Does vehicle have an antenna which extend? If not eliminate this step.
If there is noise, the following causes can be considered.
8. If due to vehicle noise: It may not be possible to prevent noise if the signal is
weak.
9. If due to external noise: In almost all cases, prevention on the receiver side is
not possible. Weak signals especially are susceptible to interference.
If there is more noise than on radios in other vehicles, find out the noise condition
and the name and frequency of the receiving stations from the owner, and consult
with the radio manufacturer's service center. INSPECTION PROCEDURE 10: Sound mixed with Noise, Only at Night (AM). The following can be considered as possible causes of noise appearing only at
night.
1. It is significantly easier to receive long-distance signals at night. This means
that even stations that are received without a problem during the day may
experience problems at night. Remember that the weaker station is more
susceptible to interference. The appearance of a beat sound may occur in the
evening. A beat sound is created when two signals close in frequency interfere
with each other. A common sign of this type of interference is a repetitious
high-pitched sound that may over power the desired radio station. This sound is
generated not only by sound signals but electrical waves as well.
2. The changing system may also be a source of noise. When diagnosing radio
noise, do not over look the possibility of a problem with the vehicles generator. DIAGNOSIS
STEP 1. Check the vehicles lighting system.
Q: Does the noise disappear when the vehicles headlights are turned
"OFF"?
YES: Go to Ste
p 2.
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Radio With Tape Player & Cd Player - Endeavor
Page 1777 of 3870
mounted
.
Q: Is the antenna in good condition and is it properly mounted?
YES: Consult the radio manufacturer's service center.
NO: Either repair or replace the antenna assembly. Check to see that the
noise is gone.
INSPECTION PROCEDURE 12: Excessive Noise on AM and FM. DIAGNOSIS Radio reception can be affected by Radio Frequency (RF) emissions from a variety
of sources. The disturbance is even greater if the station is weak or poorly tuned.
FM reception is not as sensitive to disturbances as AM. AM reception is sensitive to
electrical disturbances such as power lines, lightening and other types of similar
electrical phenomena.
STEP 1. Check if the customer heard the noise under any of the following
conditions.
A motorcycle was passing. Lighting was flashing. Passed beneath a power line. Passed beneath a telephone line. Passed by a signal generator. Passed by any other sources of electrical noise. Passed under a bridge or through a tunnel.
Q: Did the noise occur during any of the circumstances listed above?
YES: The observed noise is normal.
NO: Go to Step 2.
STEP 2. Compare the customers radio to another identical model.
Operate the radio in a vehicle with a known good audio system of the same
t
ype as the customer's.
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2004 BODY & ACCESSORIES Radio With Tape Player & Cd Player - Endeavor
Page 1778 of 3870
Q: Is there more noise on the customers radio?
YES: Check all power and ground connections. If all connections are in
good condition, consult the radio manufacturers service center.
NO: The observed noise is normal.
INSPECTION PROCEDURE 13: Noise is Detected with Engine Running. DIAGNOSIS
CAUTION:
Never connect a noise filter to the high tension
cable (spark plug wire). Spark plug wires
incorporate resistors which have the effect of
suppressing noise. If a spark plug wire is found
to be causing noise, it must be replaced. Confirm that the noise is not from an external
source. Noise prevention should be performed by
suppressing strong sources of noise first.
NOTE: Voltage surges can be induced in the electrical system by
the collapse of a field (i.e. When power is removed from the
coil in an A/C compressor clutch). This induced voltage
surge will radiate a Radio Frequency (RF) signal that is
picked up by the audio unit. In the case of the compressor
clutch a "pop" will be heard through the speakers. The
capacitor, installed on this vehicle, will store the excess
voltage and prevent the production of RF noise. This is
because the capacitor will charge and discharge as the
voltage fluctuates. This has the effect of "attracting" noise
and bleeding it to ground without interfering with the
normal flow of current through the system.
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2004 BODY & ACCESSORIES Radio With Tape Player & Cd Player - Endeavor
Page 1788 of 3870
Q: Is the problem station or location specific?
YES: The effect of an electrical field condition (multipath noise, fading
noise) could be the cause. Check that there is not noise.
NO: Go to Step 4.
STEP 4. Check that noise appears when the radio switch is turned on
while the vehicle is stopped.
Q: Does noise appear when the radio switch is turned on while the vehicle
is stopped and the radio is tapped while tuned away from a station?
YES: Go to Step 5.
NO: It may be static electricity noise.
STEP 5. Verify that the radio is correctly grounded.
The radio is connected to the ground with an assembling screw.
Q: Is the radio correctly grounded?
YES: Go to Step 6.
NO: Tighten the screw securely. Check that there is no noise.
Fading noise
This is a buzzing noise that occurs when the
broadcast signal is disrupted by obstructing
objects and the signal strength fluctuates intricately
within a narrow range.
NOTE: Body static electricity from the shock absorber rubber
bushings used to prevent vibration, tires, etc. occurs
because of separation from the ground, causing a
buzzing noise. There is no measures to discharge the
static electricity of the vehicle body. Check that there is
no noise.
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Radio With Tape Player & Cd Player - Endeavor
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2004 ELECTRICAL
Fuses & Circuit Breakers - Endeavor
IDENTIFICATION For fuse box locations, see Fig. 1
.
WARNING:Modifications or improper maintenance, including
incorrect removal and installation of the
Supplemental Restraint System (SRS), can
adversely affect system performance. DO NOT
cover, obstruct or change the steering wheel horn
pad in any way, as such action could cause
improper function of the system. Use only plain
water when cleaning the horn pad. Solvents or
cleaners could adversely affect the air bag cover
and cause improper deployment of the system. To
avoid injury from accidental air bag deployment, see
DISABLING & ACTIVATING AIR BAG SYSTEM in AIR
BAG RESTRAINT SYSTEMS article in GENERAL
INFORMATION.
WARNING:When battery is disconnected, vehicles equipped
with computers may lose memory data. When
battery power is restored, driveability problems may
exist on some vehicles. These vehicles may require
a relearn procedure. See COMPUTER RELEARN
PROCEDURES article in GENERAL INFORMATION.
CAUTION: Disconnect negative battery cable before servicing
any air bag system, steering column or passenger
side dash component. After any repair, turn ignition
key to the ON position from passenger's side of
vehicle in case of accidental air bag inflation.
2004 Mitsubishi Endeavor Limited
2004 ELECTRICAL Fuses & Circuit Breakers - Endeavor
2004 Mitsubishi Endeavor Limited
2004 ELECTRICAL Fuses & Circuit Breakers - Endeavor
Page 1986 of 3870
Fig. 1: Locating Fuses & Fusible Links
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
ENGINE COMPARTMENT For fuse location and values, see Fig. 2
.
2004 Mitsubishi Endeavor Limited
2004 ELECTRICAL Fuses & Circuit Breakers - Endeavor
