2004 MITSUBISHI ENDEAVOR heater

YES:
The procedure is complete.
NO:
Repair the defogger.

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

Fig. 240: Checking Defogger

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INSPECTION PROCEDURE 9: DEFOGGER TIMER FUNCTION DOES NOT OPERATE CIRCUIT OPERATION Turn ON the defogger switch. If the defogger does not shut off after about 17
minutes then the defogger timer is malfunctioning. TROUBLESHOOTING HINT
Malfunction of the A/C-ECU Malfunction of the defogger timer
DIAGNOSIS Replace the A/C-ECU. INSPECTION PROCEDURE 10: MALFUNCTION OF THE A/C-ECU POWER SUPPLY SYSTEM
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 241: View Of A/C
-ECU Power Supply Circuit

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 242: Identifying Connectors C
-04, C
-31, C
-103 And C
-104

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 243: Identifying Connectors C
-16 And C
-17
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 244: Identifying Connectors C
-211 And C
-215

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TECHNICAL DESCRIPTION (COMMENT) The A/C-ECU power system may be defective if the air conditioner, defogger, and
outside/inside air selection damper motor all do not operate normally. TROUBLESHOOTING HINTS
Malfunction of the A/C-ECU Damaged harness wires or connectors
DIAGNOSIS Required Special Tools:

MB991223: Test Harness Set STEP 1. Check A/C-ECU connector C-17 for loose, corroded or damaged

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

terminals, or terminals pushed back in the connector
.
Q: Is A/C-ECU connector C-17 in good condition?

YES:
Go to Step 2.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. Check that the air conditioning works
normally.
Fig. 245: Locating Connector C
-17
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STEP 2. Measure the voltage at A/C-ECU connector C-17.

1. Disconnect A/C-ECU connector C-17 and measure the voltage at the
harness side.
2. Turn the i
gnition switch to the "ON"
position.

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

Fig. 246: Locating Connector C
-17
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

3. Measure the voltage between terminal 28 and ground.
The measured value should be approximately 12 volts (battery positive volta
ge).

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