MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Refer to
HOW TO USE TROUBLESHOOTING/ INSPECTION
SERVICE POINTS
.
NO:
Repair the wiring harness. Check that the air conditioning works
normally.
Fig. 162: Locating Connector A
-13
Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

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

Fig. 163: Locating Connector C
-24
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 18. Check the refrigerant temperature switch.

1. Dip the metal part of the cooling temperature switch into engine oil and
increase the oil temperature using a gas burner or similar.
CAUTION: Do not heat more than necessary.

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

Fig. 164: Checking Refrigerant Temperature Switch

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2. When the oil temperature reaches the standard value, check that voltage is
supplied between the terminals.
Standard value:


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

Fig. 165: Refrigerant Temperature Switch Continuity

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NOTE: When the oil temperature is 155°C (311°F) or m ore and
there is no continuity, the resistance will not be 2ohm
or lower until the oil temperature reduces to 125°C (257°
F) or less.
Fig. 166: Oil Temperature Specification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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

Q: Is the refrigerant temperature switch operating properly?

YES:
Go to Step 19.
NO:
Replace the refrigerant temperature switch. Check that the air
conditioning works normally.
STEP 19. Check the air conditioning compressor clutch operation.

Connect the compressor connector terminal to the battery positive (+) terminal
and ground the battery's negative (-) terminal to the compressor unit. At that
time, the air conditioning compressor clutch should make a definite operating
sound.
Q: Can the sound (click) of the air conditioning compressor clutch
operation be heard?

YES:
Go to Step 20.
NO:
Replace the compressor magnet clutch. Check that the air
conditionin
g works normall
y.

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

Fig. 167: Checking Air Conditioning Compressor Clutch Operation

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STEP 20. Check the air thermo sensor.

Measure the resistance between connector terminals 1 and 2 under at least two
different temperatures. The resistance values should generally match those in
the graph.
Q: Is the air thermo sensor in good condition?

YES:
Go to Step 21.
NO:
Replace the air thermo sensor. Check that the air conditioning works
normally.
NOTE: The temperature at the check should not exceed the
range in the graph.

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

Fig. 168: Connector Terminal Resistance (1 Of 2)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 21. Check the ambient air temperature sensor.

Measure the resistance between the sensor terminals under at least two
temperatures. The resistance values should meet the values shown.
Q: Is the ambient air temperature sensor in good condition?

YES:
Go to Step 22.
NO:
Replace the ambient air temperature sensor. Check that the air
conditioning works normally.
NOTE: The temperature should be within the shown range.

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

Fig. 169: Connector Terminal Resistance (2 Of 2)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 22. Check the A/C pressure sensor operation.

1. Assemble a gauge manifold on the high pressure service valve.
2. Disconnect the A/C pressure sensor connector and connect special tool test
harness MB991658 as shown in the illustration.

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

Fig. 170: Identifying A/C Pressure Sensor Connector

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

3. Turn ON the engine and then turn ON the air conditioner switch.
4. At this time, check to see that the voltage of A/C pressure sensor terminal
No.2 reflects the specifications of the figure.

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

Fig. 171: Checking Voltage Of A/C Pressure Sensor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the A/C pressure sensor operating properly?

YES:
Go to Step 23.
NO:
Replace the A/C pressure sensor. Check that the air conditioning
works normally.
NOTE: The allowance shall be defined as +/-5%

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