MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Fig. 218: Identifying Connectors F
-01, F
-03 And F
-05
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

TECHNICAL DESCRIPTION (COMMENT) If the defogger does not operate when the defogger switch is turned on, the
defogger relay system may be defective. TROUBLESHOOTING HINTS
Malfunction of the A/C-ECU Malfunction of the defogger relay Damaged harness wires or connectors

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

DIAGNOSI
S
Required Special Tools:

MB991223: Test Harness Set STEP 1. Check the A/C and outside/inside air selection damper control
motor operation.

Q: Do the A/C and outside/inside air selection damper control motor work
normally?

YES:
Go to Step 2.
NO:
Refer to
INSPECTION PROCEDURE 10 MALFUNCTION OF
THE A/C
-ECU POWER SUPPLY SYSTEM
.
STEP 2. Check defogger relay connector C-201 for loose, corroded or
damaged terminals, or terminals pushed back in the connector.

Q: Is defogger relay connector C-201 in good condition?

YES:
Go to Step 3.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. The defogger system should work
normall
y.

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

Fig. 219: Locating Connector C
-201

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 3. Check the defogger relay continuity.


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

Fig. 220: Identifying Defogger Relay

Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

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

Follow the table below to check the defogger relay for continuity. DEFOGGER RELAY CONTINUITY

Q: Is the defogger relay in good condition?

YES:
Go to Step 4.
NO:
Replace the defogger relay. The defogger system should work
normally.
STEP 4. Check defogger connector F-01 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.

Q: Is defogger connector F-01 in good condition?

YES:
Go to Step 5.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. Check that the defogger system works
normall
y.
BATTERY VOLTAGE
CONNECT TESTER
BETWEEN
SPECIFIED
CONDITION
Not applied
4 - 5
Open Circuit
Connect terminal 1 to the
positive battery terminal

Connect terminal 3 to the
negative battery terminal
4 - 5
Less than 2 ohms

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

Fig. 221: Locating Connector F
-01
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 5. Measure the voltage at defogger connector F-01.

1. Disconnect defogger connector F-01, and measure the voltage at the
harness side.
2. Turn the ignition switch to the "ON" position.
3. Turn the defo
gger switch to the "ON"
position.

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

Fig. 222: Locating Connector F
-01
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

4. Measure the voltage between terminal 1 and ground.
The measured value should be approximately 12 volts (battery
positive voltage).
Q: Is the measured voltage approximately 12 volts?

YES:
Go to Step 13 .
NO:
Go to Ste
p 6.

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

Fig. 223: Measuring Voltage Between Terminal 1 And Ground

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 6. Measure the voltage at defogger relay connector C-201.

1. Disconnect defogger relay connector C-201, and measure the voltage at
the junction block side.

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

Fig. 224: Locating Connector C
-201

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2. Measure the voltage between terminal 5 and ground.
The measured value should be approximately 12 volts (battery
positive voltage).
Q: Is the measured voltage approximately 12 volts?

YES:
Go to Step 8 .
NO:
Go to Step 7.

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

Fig. 225: Measuring Voltage Between Terminal 5 And Ground

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 7. Check the wiring harness between defogger relay connector C-
201 (terminal 5) and the fusible link (1).

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