2004 MITSUBISHI ENDEAVOR Change cooling

5. Turn the A/C switch to the ON position.
6. Measure the voltage between the fan control module (side connector) terminals
while the fan is running. The voltage should switch between 5.6-10.8V and
battery voltage.
7. If the voltage does not repeatedly change as indicated, replace the radiator fan
motor.
Fig. 3: Testing Fan Control Module (1 Of 2)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor Limited
2004 ENGINE COOLING Electric Cooling Fans - Endeavor

Fig. 6: Testing Multi
-Port Fuel Injection (MFI) Relay

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
RADIATOR FAN MOTOR Information is not available from the manufacturer. SYMPTOM TESTS RADIATOR FAN & CONDENSER FAN SYMPTOMS TEST A: RADIATOR FAN & CONDENSER FAN DO NOT OPERATESymptom
Test
Radiator Fan & Condenser Fan Do Not Operate
A
Radiator Fan & Condenser Fan Do Not Change Speed Or
Stop
B
Radiator Fan Does Not Operate
C
Condenser Fan Does Not Operate
D

2004 Mitsubishi Endeavor Limited
2004 ENGINE COOLING Electric Cooling Fans - Endeavor

Fig. 12: Identifying Power Plant ECU Check Harness (MB991923)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
TEST B: RADIATOR FAN & CONDENSER FAN DO NOT CHANGE SPEED OR STOP Technical Description The fan control module has variable control of the radiator fan motor and the
condenser fan motor speeds using signals transmitted from the PCM. Troubleshooting Hints
Malfunction of fan control relay. Malfunction of fan control module. Malfunction of PCM.
Diagnosis 1. Check the fan control relay. See FAN CONTROL RELAY
under
COMPONENT TESTS. If fan control relay is okay, go to next step. If fan
control module is damaged, repair or replace as necessary and retest.
2. Check the harness wire between terminal No. 2 of fan control relay connector
A-10X and terminal No. 3 of fan control module connector A-18. See Fig. 7

and Fig. 8
. If wiring is damaged, repair or replace as necessary and retest. If
wiring is okay, go to next step.
3. Disconnect all the connectors from the PCM. Connect Power Plant ECU Check
Harness (MB991923
) between the PCM and the bod
y-side harness connector.
NOTE: If the engine coolant temperature reaches 230°F (110°C) or
higher, the radiator fan control runs the radiator fan for up
to 5 minutes even after the ignition switch is turned to the
LOCK position. The fan stops its rotation when the engine
coolant temperature decreases to 230°F (110°C) or l ower.
NOTE: Measure the output circuit voltage at terminal No. 10 of
PCM connector B-18 by using Power Plant ECU Check
Harness (MB991923). See Fig. 11
and Fig. 12
.

2004 Mitsubishi Endeavor Limited
2004 ENGINE COOLING Electric Cooling Fans - Endeavor

2004 ENGINE COOLING
Specifications & Drive Belt Routing - Endeavor
COOLING SYSTEM BLEEDING 1. Using LLC Changer (MB991871), refill cooling system with appropriate
mixture between 30-60% anti-freeze (depending on weather conditions). See
Fig. 1
. Typically a solution of 50% anti-freeze and 50% distilled water is
sufficient for most areas. A solution of 50% anti-freeze and 50% water has a
freezing point of -32.8°F (-31°C).
2. Reinstall the radiator cap.
3. Start the engine and let it warm up until the thermostat opens.
4. After repeatedly revving the engine up to 3000 RPM several times, shut off the
engine.
5. Remove the radiator cap after engine has become cold, completely fill the
radiator with coolant. Reinstall the cap.
6. Ensure coolant in the reserve tank is between the FULL and LOW marks. Add
coolant if necessar
y.
CAUTION: DO NOT use alcohol or methanol anti-freeze or any
engine coolants mixed with alcohol or methanol anti-
freeze. The use of an improper anti-freeze can cause
corrosion of the aluminum components.
CAUTION: DO NOT overfill the reserve tank.

2004 Mitsubishi Endeavor Limited
2004 ENGINE COOLING Specifications & Drive Belt Routing - Endeavor


2004 Mitsubishi Endeavor Limited
2004 ENGINE COOLING Specifications & Drive Belt Routing - Endeavor

Use these steps to plan your diagnostic strategy. If you follow them carefully, you
will be sure to find most of the engine cooling faults.
1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find and repair the malfunction by following the SYMPTOM CHART.
4. Verify that the malfunction is eliminated. SYMPTOM CHART SYMPTOM INSPECTION PROCEDURE CHART SYMPTOM PROCEDURES INSPECTION PROCEDURE 1: Coolant Leak DIAGNOSIS
STEP 1. Check for coolant leaks
.
SYMPTOM
INSPECTION
PROCEDURE
REFERENCE PAGE
Coolant Leak
1
INSPECTION PROCEDURE 1:
Coolant Leak
Engine Overheating
2
INSPECTION PROCEDURE 2:
Engine Overheating
Radiator Fan and
Condenser Fan do not
Operate
3
INSPECTION PROCEDURE 3:
RADIATOR FAN AND
CONDENSER FAN DO NOT
OPERATE
Radiator Fan and
Condenser Fan do not
Change Speed or Stop
4
INSPECTION PROCEDURE 4:
RADIATOR FAN AND
CONDENSER FAN DO NOT CHANGE SPEED OR STOP
Radiator Fan does not
Operate
5
INSPECTION PROCEDURE 5: Radiator Fan does not Operate
Condenser Fan does
not Operate
6
INSPECTION PROCEDURE 6: Condenser Fan does not Operate

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
STEP 14. Check the symptoms.
Q: Do the radiator fan and condenser fan operate correctly?
YES: The procedure is complete.
NO: Return to Step 1 .
INSPECTION PROCEDURE 4: Radiator Fan and Condenser Fan do not Change Speed or Stop Radiator Fan and Condenser Fan Drive Circuit Refer to INSPECTION PROCEDURE 3: RADIATOR FAN AND CONDENSER FAN DO NOT OPERATE
.
CIRCUIT OPERATION
The fan control module is powered from fusible link number 2. The PCM judges the required revolution speed of radiator fan motor and
condenser fan motor using the input signals transmitted from A/C switch,
automatic compressor controller, vehicle speed sensor and engine coolant
temperature sensor. The PCM activates the fan control module to drive the
radiator fan motor and condenser fan motor.
TECHNICAL DESCRIPTION The fan controller has variable control of the radiator fan motor and the condenser
fan motor speeds using signals transmitted from the PCM. TROUBLESHOOTING HINTS NOTE: If the engine coolant temperature reaches 110°C (230°F) or
higher, the radiator fan control runs the radiator fan for up
to 5 minutes even after the ignition switch is turned to the
"LOCK" (OFF) position [the fan stops its rotation when the
engine coolant temperature decreases to 110°C (230° F) or
lower.]
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 44: Measuring Voltage Between Fan Control Module
-Side Connector
Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
6. Turn the A/C switch to the "ON" position.
7. Measure the voltage between the fan control module-side connector terminals
while the fan is running. The voltage should repeat the values 1) and 2) below.
Standard value:
1.8.2+/-2.6 V
2.Battery positive voltage+/-2.6 V
8. If the voltage does not repeatedly change as indicated, replace the radiator fan
motor.
FAN CONTROL RELAY CONTINUITY CHECK
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor