2004 MITSUBISHI ENDEAVOR air conditioning

1. Disconnect rear blower motor connector C-20, and measure the voltage at
the wiring harness 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.
Fig. 27: Identifying Connector C
-20
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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

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

Fig. 31: Identifying Connector C
-209

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 32: Identifying Connector C
-209

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the measured voltage approximately 12 volts?

YES:
Go to Step 8 .
NO:
Go to Step 6.
STEP 6. Check A/C-ECU connector C-16 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 33: Identifying Connector C
-16
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is A/C-ECU connector C-16 in good condition?

YES:
Go to Step 7.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. The rear blower motor should operate
normally.
STEP 7. Check the wiring harness between A/C-ECU connector C-16
(terminal 7) and rear blower relay connector C-209 (terminal 3).

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor