2004 MITSUBISHI ENDEAVOR air conditioning

STEP 16. Check the wiring harness between A/C-ECU connector C-16
(terminals 17 and 18) and power transistor connector C-108 (terminals 1
and 3).

Q: Is the wiring harness between A/C-ECU connector C-16 (terminals 17
and 18) and power transistor connector C-108 (terminals 1 and 3) in good
condition?

YES:
Go to Step 17.
NO:
Repair the wiring harness. The front blower motor should operate
normall
y.

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

Fig. 202: Locating Connectors C
-16 And C
-108

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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

STEP 17. Replace the power transistor.

Q: Does the blower motor operate normally?

YES:
No action is necessary and testing is complete.
NO:
Replace the A/C-ECU. Check that the air conditioning works
normally.
INSPECTION PROCEDURE 6: FRONT BLOWER AIR AMOUNT CANNOT BE CHANGED
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 203: View Of Blower Motor Circuit

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

Fig. 204: Identifying Connectors C
-16, C
-108 And C
-111

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CIRCUIT OPERATION If the blower motor speed cannot be changed, the power transistor circuit is
suspected. TROUBLESHOOTING HINTS
Malfunction of the power transistor Malfunction of the front A/
C-ECU

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

Damaged harness wires or connectors
DIAGNOSIS Required Special Tool:

MB991223: Test Harness Set STEP 1. Check power transistor connector C-108 for loose, corroded or
damaged terminals, or terminals pushed back in the connector.

Q: Is power transistor connector C-108 in good condition?

YES:
Go to Step 2.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. The front blower motor should operate
normall
y.

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

Fig. 205: Locating Connector C
-108

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 2. Measure the resistance at power transistor connector C-108.

1. Disconnect power transistor connector C-108, and measure the resistance
at the wirin
g harness side.

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

Fig. 206: Locating Connector C
-108

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2. Measure the resistance value between terminal 2 and ground.
The measured value should be 2 ohms or less.
Q: Does the measured resistance value correspond with this range?

YES:
Go to Step 4 .
NO:
Go to Ste
p 3.

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