engine MITSUBISHI ENDEAVOR 2004 Service Owner's Manual

Fig. 5: Testing Fan Control Relay

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MULTI-PORT FUEL INJECTION (MFI) RELAY Inspect the MFI relay and throttle actuator control motor relay for continuity as
shown. See Fi
g. 6 .

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2004 ENGINE COOLING Electric Cooling Fans - Endeavor

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

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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

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Technical Descriptio
n
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 radiator fan motor. Malfunction of condenser fan motor. Malfunction of fan control module. Malfunction of PCM. Damaged wiring harness or connector.
Diagnosis 1. Disconnect fan control module connector A-23. See Fig. 7
. Measure for
voltage between terminal No. 3 (harness side of the connector) and ground
when ignition switch is turned to the ON position. If battery voltage is not
achieved, go to next step. If battery voltage is achieved, go to step 8 .
2. Check fan control relay. See FAN CONTROL RELAY under
COMPONENTS TESTS. If fan control relay is okay, go to next step. If fan
control relay is not okay, replace it and retest.
3. Check the MFI relay. See MULTI
-PORT FUEL INJECTION (MFI)
RELAY
under COMPONENT TESTS. If MFI relay is okay, go to next step. If
MFI relay is not okay, replace it and retest.
4. Check for harness damage in Black/Yellow wire between fusible link No. 2
and terminal No. 4 of fan control relay connector A-10X. See Fig. 8
. If wire is
okay, go to next step. If wire is damaged, repair or replace as necessary and
retest.
5. Check for harness damage in Blue wire between terminal No. 2 of fan control
rela
y connector
A-10X and terminal No. 3 of fan control module connector A-

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23. See Fig. 7
and Fig.
8 . If wire is okay, go to next step. If wire is damaged,
repair or replace as necessary and retest.
6. Check intermediate connector A-13 for loose, corroded, or damaged terminals,
or terminals pushed back in the connector. See Fig. 9
. If intermediate
connector is okay, go to next step. If connector A-13 is not okay, repair or
replace as necessary and retest.
7. Check for harness damage in Red wire between terminal No. 4 of MFI relay
connector B-16X and terminal No. 1 of fan control relay connector A-10X. See
Fig. 8
and Fig. 10
. If wire is okay, go to next step. If wire is damaged, repair
or replace as necessary and retest.
8. Check for harness damage between terminal No. 3 of fan control relay
connector A-10X and ground. See Fig. 8
. If wire is damaged, repair it and
retest. If wire is okay, retest.
9. Disconnect fan control module connector A-23. See Fig. 7
. Measure resistance
between terminal No. 1 of fan control module connector A-23 (harness side of
connector) and ground. If the resistance is 2 ohms or more, go to next step. If
resistance is less than 2 ohms, go to step 11 .
10. Check the harness wires between terminal No. 1 of fan control module
connector A-23 and ground. If harness wires are okay go to next step. If
harness wires are damaged, repair as necessary and retest.
11. Disconnect all connectors from the PCM. Connect Power Plant ECU Check
Harness (MB991923) between the PCM and the body-side harness connector.
See Fig. 12
. Start the engine and allow it to idle. Measure the output circuit
volta
ge between terminal No. 10 and
ground. See Fig. 12
. If the volta
ge when
NOTE: First inspect terminal No. 7 of intermediate connector
A-13. See Fig. 9
. Then inspect the wires. If intermediate
connector A-13 is damaged, repair or replace as
necessary and retest.
NOTE: Measure the output circuit voltage at terminal No. 10 of
PCM connector B-18 (Green) by using Power Plant ECU
Check Harness (MB991923). See Fig. 11
and Fig. 12
.

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the radiator fan is operating is less than 0.7V, go to next step. If the voltage
when the radiator fan is operating is 0.7V or more, go to step 13 .
12. Check the Blue/Orange wire between terminal No. 10 of PCM connector B-18
(Green) and terminal No. 2 of fan control module connector A-23. See Fig. 7

and Fig. 11
. If wiring is damaged repair or replace as necessary and retest. If
wiring is okay, go to next step.
13. Pull out terminal No. 10 of PCM connector B-18 (Green). See Fig. 11
. Turn
the ignition switch to the ON position. If the radiator fan motor and condenser
fan motor operate, replace the PCM and retest. If the radiator and the
condenser fan motor do not operate, replace the radiator fan motor and retest.
Fig. 7: Locating Fan Control Module Connector (A
-23)

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NOTE: Do not disconnect PCM connector B-18 (Green).

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Fig. 8: Locating Fan Control Relay Connector (A
-10X)

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Fig. 9: Locating Intermediate Connector (A
-13)

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Fig. 10: Locating Multi
-Port Fuel Injection (MFI) Relay Connector (B
-16X)

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Fig. 11: Locating Powertrain Control Module (PCM) Connector (B
-18)

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y of MITSUBISHI MOTOR SALES OF AMERICA
.

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

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