table MITSUBISHI ENDEAVOR 2004 Service Manual Online

Fig. 82: Identifying Damper Face And Def Position

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Operate the mode selection damper control motor as described in the table
below.

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

Fig. 83: Mode Selection Damper Control Motor Operating Table

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2. Measure the resistances between connector terminals 3 and 5, and between 3
and 7, while the mode selection damper control motor is running. The
resistances should change gradually within the standard value.
Standard value: 0.8 (DEF) - 4.8 (FACE) kohm

Q: Are the mode selection damper control motor and potentiometer in good
condition?

YES:
Replace the A/C-ECU. Then go to Step 7.
NO:
Re
place the mode selection dam
per control motor and
potentiometer.

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

2. Turn the ignition switch to "ON" position.
3. Diagnose the CAN bus line. Q: Is the check result satisfactory?

YES:
Go to Step 2.
NO:
Repair the CAN bus lines (Refer to
CAN BUS DIAGNOSTICS
TABLE
).
Then go to Step 7 .
STEP 2. Recheck for diagnostic trouble code.

Recheck if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
Q: Is the check result satisfactory?

YES:
It can be assumed that this malfunction is intermittent.
Refer to
HOW TO USE TROUBLESHOOTING/ INSPECTION
SERVICE POINTS
.
NO:
Go to Step 3.
STEP 3. Usin
g scan tool MB991958, check actuator test item 13, 14, 15, 16,
17: Air outlet c/o dumper.

1. Connect scan tool MB991958 to the data link connec
tor
CAUTION: To prevent damage to scan tool MB991958,
always turn the ignition switch to the
"LOCK" (OFF) position before connecting or
disconnecting scan tool MB991958.

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

DTC U1120: FAILURE INFORMATION ON POWERTRAIN CONTROL MODULE (RELATED TO ENGINE)TROUBLE JUDGMENT The A/C-ECU receives engine control system-related signal from the powertrain
control module by the CAN bus lines. If a fail-safe related data is contained in the
signal from the powertrain control module, DTC U1120 will be stored. TECHNICAL DESCRIPTION (COMMENT)
CURRENT TROUBLE
The wiring harness wire or connectors may have loose, corroded, or damage
terminals, or terminals pushed back in the connector, the powertrain control
module, or the A/C-ECU may be defective.
PAST TROUBLE
If DTC U1120 is stored as a past trouble, carry out diagnosis with particular
emphasis on wiring and connector(s) in the CAN bus line between the A/C-
ECU and the powertrain control module, and the power supply system to the
powertrain control module. If the connectors and wiring are normal, and
obviously the ECU is the cause of the trouble, replace the ECU. If in doubt, do
not replace the ECU.
CAUTION: If DTC U1120 is set in the A/C-ECU, diagnose the
CAN main bus line.
CAUTION: Whenever the ECU is replaced, ensure that the
communication circuit is normal.
CAUTION: The engine control system- related DTC may be set
when DTC U1120 is set (For details refer to
INTERSYSTEM AFFILIATED DTC REFERENCE
TABLE
). Diagnose the engine control system first
when the engine control system- related DTC is set.
NOTE: For a past trouble, you cannot find it by the scan tool CAN
bus diagnostics even if there is a failure in CAN bus lines.

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

Fig. 132: Locating Connector B
-16X

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 6. Check the A/C compressor clutch relay continuity.

Follow the table below to check the A/C compressor clutch relay for
continuit
y.

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

Q: Is front blower relay connector C-202 in good condition?

YES:
Go to Step 4.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. The blower motor should operate
normally.
Fig. 182: Locating Connector C
-202

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 4. Check the front blower relay continuity.

Follow the table below to check the front blower relay for continuit
y.

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

Fig. 184: Front Blower Relay Continuity Table

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the front blower relay continuity in good condition?

YES:
Go to Step 5.
NO:
Replace the front blower relay. The front blower motor should
operate normally.
STEP 5. Measure the voltage at front blower relay connector C-202.

1. Disconnect front blower relay connector C-202, and measure the voltage
at the junction block side.
2. Turn the i
gnition switch to the "ON"
position.

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

YES:
It can be assumed that this malfunction is intermittent.
Refer to
HOW TO USE TROUBLESHOOTING/ INSPECTION
SERVICE POINTS
.
NO:
Repair the wiring harness. Check that the air conditioning works
normally.
Fig. 261: Locating Connector C
-17
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

DATA LIST REFERENCE TABLE
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 262: Data List Reference Table (1 Of 2)

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