module MITSUBISHI ENDEAVOR 2004 Service Repair Manual

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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 cause could be a malfunction of the fan control module power supply or
ground circuit. The cause could also be a malfunction of the fan control module or the PCM.
TROUBLESHOOTING HINTS
Malfunction of fusible link Malfunction of fan control relay Malfunction of MFI relay Malfunction of fan control module Malfunction of PCM Damaged wiring harness or connector
DIAGNOSIS Required Special Tools:
MB991223: Harness Set MB991923: Power Plant ECU Check Harness
STEP 1. Check the circuit at fan control module connector A-23 (terminal
3).
1. Disconnect fan control module connector A-23, and measure at the
harness side connector.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 8: Disconnecting Fan Control Module Connector

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2. Measure the voltage between terminal number 3 and ground.
When the ignition switch is turned to the "ON" position, voltage
should measure battery positive voltage.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

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Q: Are the harness wires between fusible link number 2 and fan control
relay connector A-10X damaged?
YES: Repair or replace them, then go to Step 14 .
NO: Go to Step 5.
STEP 5. Check for harness damage between fan control relay connector
A-10X (terminal 2) and fan control module connector A-23 (terminal 3).
Fig. 11: Identifying Connector A
-10X

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2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 12: Identifying Connector A
-23
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Q: Are the harness wires between fan control relay connector A-10X
(terminal 2) and fan control module connector A-23 (terminal 3)
damaged?
YES: Repair or replace them, then go to Step 14 .
NO: Go to Step 6.
STEP 6. Check intermediate connector A-13 for loose, corroded or
damaged terminals, or terminals pushed back in the connector.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 15: Identifying Connector A
-10X

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Q: Are the harness wires between fan control relay connector A-10X
(terminal 3) and ground damaged?
YES: Repair or replace them, then go to Step 14 .
NO: Go to Step 9.
STEP 9. Check the circuit at fan control module connector A-23 (terminal
1).
1. Disconnect fan control module connector A-23, and measure at the
harness side connector.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 17: Checking Resistance

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Q: Is the resistance less than 2 ohms?
YES: Go to Step 11 .
NO: Go to Step 10.
STEP 10. Check the harness wire between fan control module connector
A-23 (terminal 1) and ground.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 18: Checking Harness Wire Between Fan Control Module Connector A-23
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Q: Are the harness wires between fan control module connector A-23
(terminal 1) and ground damaged?
YES: Repair or replace them, then go to Step 14 .
NO: Go to Step 11.
STEP 11. Measure the output circuit voltage at PCM connector B-18
(terminal 10) by using check harness special tool MB991923.
1. Disconnect all the connectors from the PCM.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

NO: Go to Step 12.
STEP 12. Check the harness wire between PCM connector B-18 and fan
control module connector A-23.

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Fig. 23: Locating Connector A
-23
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Q: Are the harness wires between PCM connector B-18 (terminal 10) and
fan control module connector A-23 (terminal 2) damaged?
YES: Repair or replace them, then go to Step 14 .
NO: Go to Step 13.
STEP 13. Check the fan control module at PCM connector B-18 (terminal
10).
1. Do not disconnect PCM connector B-18.
2. Pull out terminal number 10.
3. Turn the i
gnition switch to the "ON"
position.

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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