MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Check that the coolant level is up to the filler neck. Install a radiator tester and
apply 160 kPa (23 psi) pressure, and then check for leakage from the radiator
hose or connections.
WARNING:When pressure testing the cooling system,
slowly release cooling system pressure to avoid
getting burned by hot coolant.
CAUTION:
Be sure to completely clean away any
moisture from the places checked. When the tester is removed, be careful not to
spill any coolant. When installing and removing the tester and
when testing, be careful not to deform the
filler neck of the radiator.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 3: Checking For Leakage From Radiator Hose Or Connections

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is leakage present from the radiator hose or connections?
YES: Repair or replace the appropriate part, then go to Step 2.
NO: There is no action to be taken.
STEP 2. Retest the system.
Q: It there still coolant leakage?
YES: Return to Step 1 .
NO: The procedure is complete.
INSPECTION PROCEDURE 2: Engine Overheating
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

DIAGNOSI
S
STEP 1. Remove the radiator cap and check for coolant contamination.
Q: Is the coolant contaminated with rust and oil?
YES: Replace it. Refer to ENGINE COOLANT REPLACEMENT
.
NO: There is no action to be taken. Go to Step 2.
STEP 2. Check the radiator cap valve opening pressure.
1. Use a cap adapter to attach the cap to the tester.
2. Increase the pressure until the gauge indicator stops moving.
Minimum limit: 83 kPa (12 psi)
Standard value: 93 - 123 kPa (14 - 18 psi)
NOTE: Be sure that the cap is clean before testing. Rust or
other foreign material on the cap seal will cause an
improper reading.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 4: Checking Cap Valve Opening Pressure

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Q: Does the reading remain at or above the minimum limit?
YES: Go to Step 3.
NO: Replace the radiator cap. Then go to Step 5 .
STEP 3. Check thermostat operation.
Refer to INSPECTION
.
Q: Does the thermostat operate correctly?
YES: Go to Step 4.
NO: Replace the thermostat, then go to Step 5 .
STEP 4. Check the drive belt for slippage or damage.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Refer to 7. DRIVE BELTS (FOR GENERATOR, POWER STEERIN
G .
Q: Is the drive belt loose or damaged?
YES: Adjust or replace the drive belt, then go to Step 5.
NO: There is no action to be taken.
STEP 5. Retest the system.
Check the engine coolant temperature.
Q: Is the engine coolant temperature abnormally high?
YES: Return to Step 2 .
NO: The procedure is complete.
INSPECTION PROCEDURE 3: Radiator Fan and Condenser Fan do not Operate
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 5: Radiator Fan and Condenser Fan Drive Circuit Diagram & Connector Identification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 6: Identifying Connectors A
-23, A
-23-1
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Fig. 7: Identif
ying Connector B
-18

2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
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

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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