MITSUBISHI ENDEAVOR 2004 Service Repair Manual
Page 2331 of 3870
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
Page 2332 of 3870
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
Page 2333 of 3870
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
Page 2334 of 3870
Fig. 244: Identifying Connectors C
-211 And C
-215
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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
Page 2335 of 3870
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
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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
Page 2336 of 3870
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
Page 2337 of 3870
Fig. 247: Measuring Voltage Between Terminal 28 And Ground
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the measured voltage approx. 12 V?
YES:
Go to Step 4 .
NO:
Go to Step 3.
STEP 3. Check the wiring harness between A/C-ECU connector C-17
(terminal 28) and the i
gnition switch (IG2)
.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2338 of 3870
Fig. 248: Locating Connector C
-17
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the wiring harness between A/C-ECU connector C-17 (terminal 28)
and the ignition switch (IG2) in good condition?
YES:
It can be assumed that this malfunction is intermittent.
NOTE: Also check joint connector C-103, junction block
connectors C-211 and C-215 for loose, corroded, or
damaged terminals, or terminals pushed back in the
connector. If joint connector C-103, junction block
connector C-211 or C-215 is damaged, repair or replace
the connector as described in HARNESS CONNECTOR
INSPECTION
.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2339 of 3870
Refer to
HOW TO USE TROUBLESHOOTING/ INSPECTION
SERVICE POINTS
.
NO:
Repair the wiring harness. Check that the air conditioning works
normally.
Fig. 249: Locating Connector C
-103
Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2340 of 3870
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor