2004 MITSUBISHI ENDEAVOR charging

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.

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2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

MB991824: V.C.I. MB991827: MUT-III USB Cable. MB991910: MUT-III Main Harness A. MB991519: Generator Harness Connector.
This test determines whether the voltage regulator is correctly controlling the
generator output voltage. See Fig. 5
.
Fig. 5: Regulated Voltage Test

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Always be sure to check the following before the test:
WARNING:Battery posts, terminals and related accessories
contain lead and lead compounds. Wash hands
after handling.

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2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

Generator installation. Check to be sure that the battery installed in the vehicle is fully charged. Generator drive belt tension. 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 0-150A to the
generator B terminal output wire.
6. Reconnect the negative battery cable.
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.
9. Check to be sure that all lights and accessories are off.
10. Start the engine.
11. Increase the engine speed to 2,500 RPM
12. Read the value displayed on the voltmeter when the current output by the
generator becomes 10A 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 volta
ge re
gulator or the
generator.
NOTE: If the voltage is 0V, 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.

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2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

See REGULATOR VOLTAGE SPECIFICATIONS 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. Connect the negative battery cable.
20. Run the engine for 10 minutes at an idle.
REGULATOR VOLTAGE SPECIFICATIONS
WAVE PATTERN CHECK USING AN OSCILLOSCOPE Abnormal Waveforms The size of the waveform patterns can differ greatly, depending on the adjustment
of the variable knob on the oscilloscope. See Fig. 6
.
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.
Check the conditions of the generator malfunction light (illuminated/not
illuminated
) also, and carr
y out a total check.
Ambient Temp. °F (°C)
Voltage
Terminal S-4 (-20)
14.2-15.4
68 (20)
13.9-14.9
140 (60)
13.4-14.5
176 (80)
13.1-14.2

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2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

2004 Mitsubishi Endeavor Limited
2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

Fig. 6: Identifying Abnormal Waveforms

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Measurement Method Connect the oscilloscope special patterns pick-up to the generator B terminal. See
Fig. 7
.
Fig. 7: Connecting Oscilloscope

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Standard Waveform NOTE: The voltage waveform of the generator B terminal can
undulate. 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 2V or more during
2004 Mitsubishi Endeavor Limited
2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

For standard waveform observation conditions, see Fig. 8
.
Fig. 8: Identifying Observation Conditions

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
COMPONENT TESTING BRUSH 1. Replace the brush is the brush protrusion length is below 0.08" (2 mm). See
Fig. 9
.
2. The brush can be removed by unsoldering the brush lead wire. See Fig. 10
.
3. When installing a new brush, push the brush in to the brush holder, and solder
the lead wire.
idling), the wires between the generator B terminal and the
battery have broken due to fuse blowing, etc. The generator
is usually operating properly.

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2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor

Fig. 9: Identifying Protrusion Length

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2004 Mitsubishi Endeavor Limited
2004 STARTING & CHARGING SYSTEMS Generators & Regulators - Endeavor