Page 1217 of 3870
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
Fig. 23: Locating Connector A
-23
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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
Page 1218 of 3870
Q: Do the radiator fan motor and condenser fan motor operate?
YES: Replace the PCM. Then go to Step 14.
NO: Replace the radiator fan motor. Then go to Step 14.
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor
Page 1219 of 3870
Fig. 24: Locating Connector B
-18
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor
Page 1220 of 3870

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
Page 1221 of 3870
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
Page 1222 of 3870
Fig. 25: Identifying Connector A
-10X
Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor
Page 1223 of 3870
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
Page 1224 of 3870
Fig. 27: Disconnecting Connector B
-18 From PCM
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor