2004 MITSUBISHI ENDEAVOR coolant temperature

Required Special Tool
:
MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: V.C.I. MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Before checks set the vehicle in the following condition:
Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: P range
2. Connect scan tool MB991958 to the data link connec
tor.
NOTE: Vehicles for Canada, the headlight, taillight, etc. remain
lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
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 Limited
2004 ENGINE Engine - Endeavor

MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: V.C.I. MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Before checks set the vehicle in the following condition:
Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: P range
2. Connect scan tool MB991958 to the data link connec
tor.
NOTE: Vehicles for Canada, the headlight, taillight, etc. remain
lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
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 Limited
2004 ENGINE Engine - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
3. Check the basic ignition timing.
Standard value: 5° BTDC+/-3°
4. Start the engine.
5. Run the engine at idle for 2 minutes.
6. Check the idle speed. Select item number 22 and take a reading of the idle
speed.
Curb idle speed: 680+/-100 r/min
7. If the idle speed is outside the standard value, refer to MULTIPORT FUEL
INJECTION (MFI) DIAGNOSIS
.
IDLE MIXTURE CHECK Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: V.C.I. MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Before checks set the vehicle in the following condition:
Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: P range
NOTE: The idle speed is controlled automaticall
y by the idle air
control system.
NOTE: Vehicles for Canada, the headlight, taillight, etc. remain
lit even when the lighting switch is in "OFF" position
but this is no problem for checks.

2004 Mitsubishi Endeavor Limited
2004 ENGINE Engine - Endeavor

MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: V.C.I. MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Before checks set the vehicle in the following condition:
Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: P range
2. Remove all of the ignition coils and spark plugs.
3. Disconnect the crankshaft position sensor connector.
NOTE: Vehicles for Canada, the headlight, taillight, etc. remain
lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
NOTE: Doing this will prevent the engine control module from
carrying out ignition and fuel injection.

2004 Mitsubishi Endeavor Limited
2004 ENGINE Engine - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
MANIFOLD VACUUM CHECK 1. Start the engine and allow it to warm up until the temperature of the engine
coolant reaches 80 - 95°C (176 - 203°F).
2. Connect an engine tachometer.
3. Disconnect the ventilation hose from the positive crankcase ventilation (PCV)
valve, and connect a vacuum gauge to the ventilation hose.
Fig. 24: Disconnecting Ventilation Hose From Positive Crankcase
Ventilation Valve

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. Plug the PCV valve.
5. Start the en
gine and check that idle s
peed is within s
pecification. Then check

2004 Mitsubishi Endeavor Limited
2004 ENGINE Engine - Endeavor

INTRODUCTION TO HEATER, AIR CONDITIONING AND VENTILATION DIAGNOSISAir is drawn into the heater assembly from either the outside, or from the inside of
the passenger cabin if DEFROST, maximum cooling or RECIRCULATION are
selected. The air is then forced through the evaporator where heat is removed,
cooling and de-humidifying the air. Depending on the temperature selected, a
portion of this air is then forced through the heater core to achieve the selected
discharge temperature.
If the system does not cool properly, look for a problem with the refrigerant, blower
or air distribution systems. If the system does not heat properly, look for a problem
with the coolant, blower or air distribution systems. In either case all system fuses,
circuit breaker and relays should be checked. HEATER, AIR CONDITIONING AND VENTILATION DIAGNOSTIC TROUBLESHOOTING
STRATEGY Use these steps to plan your diagnostic strategy. If you follow them carefully, you
will be sure that you have exhausted most of the possible ways to find a heater, air
conditioning and ventilation fault.
1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find the malfunction by following
SYMPTOM CHART

4. Verify that the malfunction is eliminated.
DIAGNOSTIC FUNCTION HOW TO CONNECT THE SCAN TOOL (MUT-III) REQUIRED SPECIAL TOOL:

MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN
communication system)

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

FAN CONTROL RELAY CONTINUITY CHART

IDLE-UP OPERATION CHECK 1. Before inspection and adjustment, set vehicle in the following condition:
Engine coolant temperature: 80 - 90 °C (176.0 - 194.0 °F) Lights, electric cooling fan and accessories: OFF Transmission: Neutral ("N" or "P" position) Steering wheel: Straightforward
2. Check whether or not the idle speed is the standard value.
Refer to
CURB IDLE SPEED CHECK
.
Standard value: 680 +/- 50 r/min

3. Turn on the air conditioning switch and the blower speed selection dial. Engine
idling speed should be within the standard value:
Standard value

At low pressure: 680 +/- 50 r/min

At middle pressure: 730 +/- 50 r/min

At high pressure: 750 +/- 50 r/min

BATTERY VOLTAGE
TESTER
CONNECTION
SPECIFIED
CONDITION
Not applied
2 - 4
Open circuit
Connect terminal 1 to the
positive battery terminal

Connect terminal 3 to the
negative battery terminal
2 - 4
Less than 2 ohms
NOTE: The powertrain control module determines whether the
A/C load is low or high according to the output signal

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