2004 MITSUBISHI ENDEAVOR ignition

2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal?

YES:
Go to Step 2.
NO:
Repair the CAN bus line (Refer to
EXPLANATION ABOUT THE
MUT
-III CAN BUS DIAGNOSIS
, DIAGNOSIS < VEHICLES
WITHOUT ADVANCED AIR BAG
or
DIAGNOSIS WITH ADVANCED AIR BAG>
.)
STEP 2. Using scan tool MB991958, read the powertrain control module
diagnostic trouble code.

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

Check whether any engine or automatic transaxle DTCs are set or not.
1. Turn the ignition switch to the "ON" position.
2. Check for engine and automatic transaxle DTCs.
3. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result satisfactory?

YES:
Go to Step 3.
NO:
Refer to
DIAGNOSTIC TROUBLE CODE CHART
).
STEP 3. Using scan tool MB991958, check for any diagnostic trouble code.

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

Check if a DTC, which relates to CAN communication-linked systems below,
is set.
Combination meter
DTC indicating a time-out error related to the engine or automatic
transaxle control system ETACS
DTC indicating a time-out error related to the engine or automatic
transaxle control system Multi-center display unit (middle grade type)
DTC indicating a time-out error related to the engine or automatic
transaxle control system
1. Turn the ignition switch to the "ON" position.
2. Check for a DTC related to the relevant system
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES:
Go to Step 5 .
NO:
Go to Step 4.
STEP 4. Recheck for diagnostic trouble code.


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

Check again if the DTC is set.
1. Turn the ignition switch to the "ON" position.
2. Check if the DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result satisfactory?

YES:
There is an intermittent malfunction such as poor engaged connector
(s) or open circuit (Refer to
HOW TO USE TROUBLESHOOTING/
INSPECTION SERVICE POINTS
).
NO:
Replace the powertrain control module. On completion, check that
the DTC is not reset.
STEP 5. Recheck for diagnostic trouble code.


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

Check again if the DTC is set.
1. Turn the ignition switch to the "ON" position.
2. Check if the DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result satisfactory?

YES:
A poor connection, open circuit or other intermittent malfunction is
present in the lines between the powertrain control module and the A/C-
ECU (Refer to
HOW TO USE TROUBLESHOOTING/ INSPECTION
SERVICE POINTS
).
NO:
Replace the A/C-ECU. On completion, check that the DTC is not
reset.
SYMPTOM CHART
CAUTION: During diagnosis, a DTC code associated with other
system may be set when the ignition switch is turned
on with connector(s) disconnected. On completion,
confirm all systems for DTC code(s). If DTC code(s)
are set, erase them all.

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

Fig. 114: Heater And A/C System Symptom Chart

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

SYMPTOM PROCEDURES INSPECTION PROCEDURE 1: WHEN THE IGNITION SWITCH IS "ON", THE A/C DOES NOT OPERATE TECHNICAL DESCRIPTION (COMMENT) The blower system or the compressor system may be defective if there is no cool air
coming from the vents. TROUBLESHOOTING HINTS
Malfunction of blower motor Malfunction of A/C compressor
DIAGNOSIS Check that the blower motor operation when the blower switch is moved to the
"HI" position.


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

1. Turn the ignition switch to the "ON" position.
2. Turn the blower switch to the "HI" position Q: Does the blower motor operate when the blower switch is moved to the
"HI" position?

YES:
Refer to
INSPECTION PROCEDURE 4 WHEN THE A/C IS
OPERATING, TEMPERATURE INSIDE THE PASSENGER COMPARTMENT DOES NOT DECREASE (COOL AIR NOT EMITTED)
.
NO:
Refer to
INSPECTION PROCEDURE 5 BLOWER FAN AND
MOTOR DO NOT TURN
.
INSPECTION PROCEDURE 2: WHEN THE AIR OUTLET CHANGEOVER CONTROL KNOB IS MOVED TO
DEFROSTER OR DEFROSTER/FOOT POSITION, THE A/C OR THE INSIDE/OUTSIDE AIR CHANGEOVER
DAMPER MOTOR DOES NOT OPERATE TECHNICAL DESCRIPTION (COMMENT) If the outside/inside air selection damper control motor does not operate normally,
the inside/outside air changeover damper motor system may be defective. TROUBLESHOOTING HINTS
Malfunction of the A/C-ECU Malfunction of the outside/inside air selection damper control motor Damaged harness wires or connectors
DIAGNOSIS Check operation of the outside/inside air selection damper control motor.

1. Turn the ignition switch to the "ON" position.
2. Outside/inside air selection damper motor switch: This is used to switch from
the inside air to outside air or vice versa.
3. Check to see that the outside/inside air selection damper motor operates
normally.
Q: D
oes
ou
tside/
inside air
selection dam
per contr
ol m
otor wo
rk n
ormall
y?

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

Fig. 121: Measuring Voltage Between Terminal 1 And Ground

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 4. Check the wiring harness between outside/inside air selection
damper control motor connector C-106 (terminal 1) and the ignition
switch (IG2).


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