control module MITSUBISHI ENDEAVOR 2004 Service Manual Online

Fig. 18: Checking Harness Wire Between Fan Control Module Connector A-23
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

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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.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

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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

Malfunction of fan control relay Malfunction of fan control module Malfunction of PCM
DIAGNOSIS Required Special Tools:
MB991223: Harness Set MB991923: Power Plant ECU Check Harness
STEP 1. Check the fan control relay.
Refer to FAN CONTROL RELAY CONTINUITY CHECK
.
Q: Is the fan control relay in good condition?
YES: Go to Step 2.
NO: Replace the part, then go to Step 7 .
STEP 2. Check the harness wire between fan control relay connector A-
10X (terminal 2) and fan control module connector A-23 (terminal 3).

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 26: Identifying Connector A
-23
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Are the harness wires between fan control relay connector A-10X and
fan control module connector A-23 damaged?
YES: Repair or replace the part, then go to Step 7 .
NO: Go to Step 3.
STEP 3. 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 4.
STEP 4. Check fan control module connector A23 and PCM connector B-
18 for loose, corroded or damaged terminals, or terminals pushed back in
the connector.
Fig. 30: Locating Connector A
-23
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Q: Are the connectors in good condition?
YES: Go to Step 5.
NO: Repair or replace the damaged components.
STEP 5. Check the harness wire between PCM connector B-18 (terminal
10) and fan control module connector A-23 (terminal 2)
.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
Fig. 33: Identifying Connector A
-23
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Are the harness wires between PCM connector B-18 and fan control
module connector A-23 damaged?
YES: Repair or replace them, then go to Step 7 .
NO: Go to Step 6.
STEP 6. Check the fan control module at PCM connector B-18.
1. Disconnect PCM connector
B-18.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

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.
2. Pull out the pin 10 and connect it to the body ground.
Fig. 35: Checking Fan Control Module

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3. Reconnect PCM connector B-18 with pin 10 still removed.
4. Turn the ignition switch to the "ON" position.
Q: Do the radiator fan motor and condenser fan motor stop?
YES: Re
place the PCM. Then
go to Ste
p 7.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor