2004 MITSUBISHI ENDEAVOR relay

FAN CONTROL RELAY CONTINUITY CHART

IDLE-UP OPERATION CHECK 1. Before inspection and adjustment, set vehicle in the following condition:
Engine coolant temperature: 80 - 90 °C (176.0 - 194.0 °F) Lights, electric cooling fan and accessories: OFF Transmission: Neutral ("N" or "P" position) Steering wheel: Straightforward
2. Check whether or not the idle speed is the standard value.
Refer to
CURB IDLE SPEED CHECK
.
Standard value: 680 +/- 50 r/min

3. Turn on the air conditioning switch and the blower speed selection dial. Engine
idling speed should be within the standard value:
Standard value

At low pressure: 680 +/- 50 r/min

At middle pressure: 730 +/- 50 r/min

At high pressure: 750 +/- 50 r/min

BATTERY VOLTAGE
TESTER
CONNECTION
SPECIFIED
CONDITION
Not applied
2 - 4
Open circuit
Connect terminal 1 to the
positive battery terminal

Connect terminal 3 to the
negative battery terminal
2 - 4
Less than 2 ohms
NOTE: The powertrain control module determines whether the
A/C load is low or high according to the output signal

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

When metering R-134a into the refrigeration system, keep the supply tank or cans
in an upright position. If the refrigerant container is on its side or upside down,
liquid refrigerant will enter the system and damage the compressor.
Refrigerant will tarnish bright metal and chrome surfaces, and in combination with
moisture can severely corrode all metal surfaces. OPERATION CONDENSER FAN AND RADIATOR FAN CONTROL
For the operation of each fan, refer to
SYMPTOM PROCEDURES
.
COMPRESSOR CONTROL WHEN OPERATING THE AIR CONDITIONING SWITCH
The air thermo sensor, which senses the temperature of the air flowing out of
the evaporator, deactivates the compressor at 3°C (37.4°F) or below. The dual pressure switch turns OFF when the refrigerant pressure becomes
excessively high or low, thus protecting the compressor circuit. When the air thermo sensor is activated, and the ignition switch, blower switch,
and air conditioning switch are ON, the A/C compressor clutch relay is
energized.
WHEN OPERATING THE MODE SELECTION DIAL
The air conditioning will work when the mode selection dial is set to the
"Defroster" or "Defroster/foot" position or the temperature control dial is set to
the "MAX A/C" position. In other dial positions, when the air conditioning
switch is turned on, the air conditioning will work.
A/C COMPRESSOR CLUTCH RELAY ON CONDITION
or it will be stained.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 1: Identifying A/C Compressor Clutch Relay ON Condition

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

AUTO A/C DIAGNOSIS INTRODUCTION After air is taken in through the damper, it is fed to the evaporator by the blower fan
and motor and cooled. The air cooled by the air mix damper is mixed appropriately
with the warmed air to achieve a comfortable temperature. If the A/C does not
operate or the cooled air is not discharged, the system components or relay may be
faulty. AUTOMATIC AIR CONDITIONING TROUBLESHOOTING STRATEGY Use these steps to plan your diagnostic strategy. If you follow them carefully, you
will be sure that you have exhausted most of the possible ways to find a heater, air
conditioning and ventilation fault.
1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find the malfunction by following
SYMPTOM CHART
.
4. Verify malfunction is eliminated.
DIAGNOSTIC FUNCTION HOW TO CONNECT THE SCAN TOOL (MUT-III)
2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 25: Identifying Connectors C
-31 And C
-104

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CIRCUIT OPERATION If the rear blower motor does not operate, the rear blower relay system is suspected.TROUBLESHOOTING HINTS
Malfunction of the rear blower relay Malfunction of the resistor Malfunction of the rear blower motor Malfunction of the A/C-ECU The wiring harness or connectors may have loose, corroded, or damaged
terminals, or terminals pushed back in the connector
DIAGNOSIS
2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 28: Identifying Connector C
-20
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the measured voltage approximately 12 volts?

YES:
Go to Step 13 .
NO:
Go to Step 3.
STEP 3. Check rear blower relay connector C-209 for loose, corroded or
damaged terminals, or terminals pushed back in the connector.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 29: Identifying Connector C
-209

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is rear blower relay connector C-209 in good condition?

YES:
Go to Step 4.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. The rear blower motor should operate
normally.
STEP 4. Check the rear blower relay continuity.

Follow the table below to check the rear blower relay for continuity.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 30: Identifying Rear Blower Relay

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

REAR BLOWER RELAY CONTINUIT
Y
Q: Is the rear blower relay in good condition?

YES:
Go to Step 5.
NO:
Replace the rear blower relay. The rear blower motor should operate
normally.
STEP 5. Measure the voltage at rear blower relay connector C-209.

1. Disconnect rear blower relay connector C-209, and measure the voltage at
the junction block side.
2. Turn the ignition switch to the "ON" position.
3. Turn the blower speed selection dial to the "MAX" position.
4. Turn the mode selection dial to the "Face" position.
5. Turn the rear blower switch to the "ON" position.
BATTERY VOLTAGE
TESTER
CONNECTION
SPECIFIED
CONDITION
Not applied
1 - 4
Open circuit
Connect terminal 3 to the
positive battery terminal

Connect terminal 2 to the
negative battery terminal
1 - 4
Less than 2 ohms

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor