2004 ISUZU TF SERIES coolant

6E–256 ENGINE DRIVEABILITY AND EMISSIONS
POOR FUEL ECONOMY SYMPTOM
DEFINITIONS: Fuel economy, as measured by an actual road test, is noticeably lower than expected. Also, economy
is noticeably lower than it was on this vehicle at one time, as previously shown by an actual road test.
Step Action Value(s) Yes No
1Was the “On-Board Diagnostic (OBD) System Check”
performed?—Go to Step 2Go to OBD
System Check
2 1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?—Verify repair Go to Step 3
3 Was a visual/physical check performed?
—Go to Step 4Go to Visual /
physical Check.
4 Check owner’s driving habits.
Is the A/C On full time (defroster mode On)?
Are tires at the correct pressure?
Are ex cessively heavy loads being carried?
Is acceleration too much, too often?—Go to Step 5Go to Step 6
5 Review the items in Step 4 with the customer and
advise as necessary.
Is the action complete?—System OK—
6 Visually/physically check: Vacuum hoses for splits,
kinks, and improper connections and routing as
shown on the “Emission Control System Schematics”.
Was a problem found?—Verify repair Go to Step 7
7 Check for low engine coolant level.
Was a problem found? —Verify repair Go to Step 8
8 Check for incorrect or faulty engine thermostat. Refer
to Engine Cooling.
Was a problem found?—Verify repair Go to Step 9
9 Remove and check the air filter element for dirt or for
restrictions.
Was a problem found?—Verify repair Go to Step 10
10 1. Using a Tech 2, display the MAP sensor value in
comparison with atmosphere temperature.
2. Check for a faulty, plugged, or incorrectly installed
MAP sensor.
Was the problem found?—Verify repair Go to Step 11
11 1. Using a Tech 2, display the ECT sensor and IAT
sensor value and warm up condition compared
with the typical data.
2. Check the specified value or wire.
Was the problem found?—Verify repair Go to Step 12
12 Check the knock sensor wire, shield wire, or
installation condition.
Was a problem found?—Verify repair Go to Step 13
13 Check the fuel pressure. Refer to 6E-108 page
Fuel
System Diagnosis
.
Was a problem found?—Verify repair Go to Step 14

ENGINE DRIVEABILITY AND EMISSIONS 6E–265
ENGINE COOLANT TEMPERATURE (ECT)
SENSOR
Location
Installed to the thermostat housing.
Removal Procedure
1. Disconnect the negative battery cable.
2. Drain enough engine coolant so that the coolant
level will be below the ECT sensor.
3. Disconnect connector from the ECT sensor.
4. Loosen and remove the ECT sensor from the
thermostat housing.
NOTE: Cool down the engine before above procedures
are carried out.
Installation Procedure
1. Apply sealer to threads of screw at the ECT sensor.
2. Tighten the ECT sensor with specified tightening
torque.
Tightening Torque
Bolt: 13N·m (1.3kgf·m)
3. Connect a ECT sensor connector to the ECT
sensor.
4. Fill the engine coolant.
5. Connect the negative battery cable.
NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.
Verify no engine coolant leaking from the sensor
threads after replacement.
INTAKE AIR TEMPERATURE (IAT) SENSOR
Location
Installed to the intake duct housing.
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect a IAT sensor connector from the IAT
sensor.
3. Remove the IAT sensor from the intake duct.
Installation Procedure
1. Install the IAT sensor into intake air duct.
2. Connect a IAT sensor connector to the IAT sensor.
3. Connect the negative battery cable.
NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.

0B-2 MAINTENANCE AND LUBRICATION
MAINTENANCE SCHEDULE (For GENERAL EXPORT)
Items followed by an asterisk (*) require more frequent maintenance if the vehicle is driven under severe conditions.
Refer to "SEVERE CONDITIONS MAINTENANCE SCHEDULE."

I : Inspect and correct or replace as necessary A : Adjust
R : Replace or change T : Tighten to specified torque L : Lubricate


SERVICE INTERVAL:

1,000 km 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100(Use odometer reading
1,000 miles 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60or months whichever
comes fi rst)
or months 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120
ENGINE Idling speed and acceleration
(GASOLINE) I I - I - I - I - I - I - I - I - I - I
(DIESEL) I I I I I I I I I I I I I I I I I I I I * Air cleaner element
(GASOLINE) - I - I - I - R - I - I - I - R - I - I
(DIESEL) I I I I I I I R I I I I I I I R I I I I * P Engine oil (6VE1) - R - R - R - R - R - R - R - R - R - R * P Engine oil (C24SE) Replace every 12,000km * D Engine oil (4JH1-TC) - R - R - R - R - R - R - R - R - R - R * D Engine oil (4JA1-TC) - - R - - R - - R - - R - - R - - R - - * D Engine oil (4JA1-T) RR R R RR RRRRRRRR R R R RRR * P Engine oil filter (6VE1) - R - R - R - R - R - R - R - R - R - R * P Engine oil filter (C24SE) Replace every 12,000km * D Engine oil filter (4JH1-TC, 4JA1-T) - R - R - R - R - R - R - R - R - R - R * D Engine oil filter (4JA1-TC) - - R - - R - - R - - R - - R - - R - - Oil leakage and contamination
(GASOLINE) - I - I - I - I - I - I - I - I - I - I
(DIESEL) I I I I I I I I I I I I I I I I I I I I Fuel leakage I I - I - I - I - I - I - I - I - I - I Fuel tank - - - | - - - | - - - | - - - | - - - | P O2 Sensor Replace every 160,000km P Valve clearances (6VE1) Check and adjust if noisy D Valve clearances A - - A - - - A - - - A - - - A - - - A P Spark plugs (C24SE) (for leaded
fuel use) - R - R - R - R - R - R - R - R - R - R
P Spark plugs (C24SE) (for unleaded
fuel use) - - - - - R - - - - - R - - - - - R - -
P Spark plugs (6VE1) Replace every 160,000km Spark plug wire | | - | - | - | - | - | - | - | - | - | Fuel filter (GASOLINE) - - - R - - - R - - - R - - - R - - - R Fuel filter (DIESEL) - - R - - R - - R - - R - - R - - R - - Engi ne / Accessory dri ve belt
(GASOLINE) - - - - - - - - - R - - - - - - - - - R
Fan belt tension and damage
(DIESEL) I I I I I I I I I I I I I I I I I I I I
* Exhaust system I I - I - I - I - I - I - I - I - I - I Engine coolant concentration (6VE1) - - - - - - - - - R - - - - - - - - - R (C24SE) - | - | - | - | - R - | - | - | - | - R Engine coolant level concentration
(DESEL) I I I I I I I I I R I I I I I I I I I R
Cooli ng sy stem for water l eakage - I - I - I - I - I - I - I - I - I - I All hoses and pipes in engine
compartment for clogs or damage - I - I - I - I - I - I - I - I - I - I
P Timing belt (C24SE) - - - - - - - - - - - - - - - I - - - - (Replace every 120,000km) P Timing belt (6VE1) Replace every 160,000km CLUTCH Cl utch fl ui d I I - I - I - I - I - I - I - I - I - I Clutch pedal travel and free play I I - I - I - I - I - I - I - I - I - I

MAINTENANCE AND LUBRICATION 0B-5
MAINTENANCE SCHEDULE (For EUROPE)
Items followed by an asterisk (*) require more frequent maintenance if the vehicle is driven under severe conditions.
Refer to "SEVERE CONDITIONS MAINTENANCE SCHEDULE."
Diesel Engine model (ACEA B2 specification engine oil)

I : Inspect and correct or replace as necessary A : Adjust
R : Replace or change T : Tighten to specified torque L : Lubricate


SERVICE INTERVAL:
1,000 km 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100(Use odometer reading or
1,000 miles 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60months whichever comes
fi rst)
or months 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120
DIESEL ENGINE * Engine oil (4JH1-TC) - R - R - R- R- R- R- R - R - R- R* Engine oil (4JA1-TC) - - R - - R - - R - - R - - R - - R - - * Engine oil filter(4JH1-TC) - R - R - R- R- R- R- R - R - R- R* Engine oil filter (4JA1-TC) - - R - - R - - R - - R - - R - - R - - Oil leakage and contamination I I I I I I I I I I I I I I I I I I I I Idling speed and acceleration I I I I I I I I I I I I I I I I I I I I Fan belt tension and damage I I I I I I I I I I I I I I I I I I I I Exhaust system I I - I - I - I - I - I - I - I - I - I All hoses and pipes in engine
compartment for clog of damage - I I I I I I I I I I I I I I I I I I I
Valve clearance (4JH1-TC) - - - A - - - A - - - A - - - A - - - A Valve clearance (4JA1-TC) - - A - - A - - A - - A - - A - - A - - * Air cleaner element (4JH1-TC) I I I I I I I R I I I I I I I R I I I I * Air clearance element (4JA1-TC) - - I I I I I I R I I I I I I I I R I I Fuel filter (4JH1-TC) - - R - - R - - R - - R - - R - - R - - Fuel filter (4JA1-TC) - - - - - - - - R - - - - - - - - R - - Engine coolant concentration (4JH1-TC) - I - I - I - I - I - I - I - I - I - I Engine coolant concentration
(4JA1-TC) - - I - - I - - I - - I - - I - - I - - Cooling system for water leakage
(4JH1-TC) - I - I - I - I - I - I - I - I - I - I Cooing system for water leakage (4JA1-TC) - - I - - I - - I - - I - - I - - I - - CLUTCH Clutch fluid (4JH1-TC) I I - I - I - I - I - I - I - I - I - I Clutch fluid (4JA1-TC) - - I - - I - - I - - I - - I - - I - - Clutch pedal travel and play (4JH1-TC) I I - I - I - I - I - I - I - I - I - I Clutch pedal travel and play (4JA1-TC) - - I - - I - - I - - I - - I - - I - - TRANSMISSION OR TRANSMISSION
WITH TRANSFER CASE
* Manual transmission with fluid (4JH1-TC) - R - I - - - R - - - I - - - R - - - I * Manual transmission with fluid
(4JA1-TC) - - R - - I - - R - - I - - R - - I - - * Transfer case oil (4JH1-TC) - - - I - - - I - - - I - - - I - - - I * Transfer case oil (4JA1-TC) - - R - - I - - R - - I - - R - - I - - Oil leakage (4JH1-TC) I I I I I I I I I I I I I I I I I I I I Oil leakage (4JA1-TC) - - I - - I - - I - - I - - I - - I - - Gear control mechanism for
looseness (4JH1-TC) - - - I - - - I - - - I - - - I - - - I Gear control mechanism for
looseness (4JA1-TC) - - - - - - - - I - - - - - - - - I - I * AT Automatic transmission fluid
(4JH1-TC) - - - I - - - I - - - I - - - I - - - I * AT Automatic transmission fluid (4JA1-TC) - - - - - - - - I - - - - - - - - I - I * AT Transfer case oil (4JH1-TC) - R - I - - - R - - - I - - - R - - - I * AT Transfer case oil (4JA1-TC) - - R - - I - - R - - I - - R - - I - -

MAINTENANCE AND LUBRICATION 0B-9


Diesel Engine model (Engine oil that meet or exceeds ACEA B3 specification)
I : Inspect and correct or replace as necessary A : Adjust
R : Replace or change T : Tighten to specified torque L : Lubricate


SERVICE INTERVAL:
1,000 km 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100(Use odometer reading or
1,000 miles 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60months whichever comes
fi rst)
or months 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120
DIESEL ENGINE * Engine oil - - - R - - - R - - - R - - - R - - - R* Engine oil filter - - - R - - - R - - - R - - - R - - - ROil leakage and contamination - - - I - - - I - - - I - - - I - - - I Idling speed and acceleration - - - I - - - I - - - I - - - I - - - I Fan belt tension and damage - - - I - - - I - - - I - - - I - - - I Exhaust system - - - I - - - I - - - I - - - I - - - I All hoses and pipes in engine
compartment for clog of damage
-
-
-
I
-
-
-
I
-
-
-
I
-
-
-
I
-
-
-
I
Valve clearance - - - A - - - A - - - A - - - A - - - A * Air cleaner element - - - I - - - I - - - R - - - I - - - I Fuel filter - - - - - - - - - - - R - - - - - - - - Engine coolant concentration - - - I - - - I - - - I - - - I - - - I Cooling system for water leakage - - - I - - - I - - - I - - - I - - - I CLUTCH Clutch fluid - - - I - - - I - - - I - - - I - - - I Clutch pedal travel and play - - - I - - - I - - - I - - - I - - - I TRANSMISSION OR TRANSMISSION
WITH TRANSFER CASE
* Manual transmission with fluid - - - R - - - I - - - R - - - I - - - I * Transfer case oil - - - R - - - I - - - R - - - I - - - I Oil leakage - - - I - - - I - - - I - - - I - - - I Gear control mechanism for
looseness - - - - - - - - - - - I - - - - - - - -
* AT Automatic transmissi on fl ui d - - - - - - - - - - - I - - - - - - - - * AT Transfer case oil - - - R - - - I - - - R - - - I - - - R PROPELLER SHAFT Loose connections - - - I - - - I - - - I - - - I - - - I * Universal joints and splines for wear - - - I - - - I - - - I - - - I - - - I 4WD Universal joints and sliding
sleeve - - - L - - - L - - - L - - - L - - - L
FRONT AND REAR AXLE * Differential gear oil (Front and rear) - - - R - - - I - - - R - - - I - - - ROil leakage - - - I - - - I - - - I - - - I - - - I Shift on the fly system Gear oi l - - - - - - - - - - - I - - - - - - - - Front axle shaft rubber boot for
damage - - - - - - - - - - - I - - - - - - - I
Axle case for distortion or damage - - - - - - - - - - - I - - - - - - - I Axle shafts for distortion or damage - - - - - - - - - - - I - - - - - - - I STEERING Power steering fluid - - - I - - - R - - - I - - - R - - - I Oil leakage - - - I - - - I - - - I - - - I - - - I * Steering system for looseness or
damage - - - I - - - I - - - I - - - I - - - I
Power steering hose - - - I - - - I - - - I - - - R - - - I Steering wheel play - - - I - - - I - - - I - - - I - - - I Steeri ng function - - - I - - - I - - - I - - - I - - - I Right and left turning radius - - - - - - - - - - - I - - - - - - - - Wheel al i gnment - - - - - - - - - - - I - - - - - - - - Joi nt ball for oil l eakage or damage - - - I - - - I - - - I - - - I - - - I Joi nt ball rubber boot for damage - - - I - - - I - - - I - - - I - - - I

0B-14 MAINTENANCE AND LUBRICATION


GRADE LUBRICATION MAKE BRAND / TYPE
API ACEA
Automatic transmission
Power steering ISUZU GENUINE
EXXON / ESSO
MOBIL
CALTEX
SHELL
ELF
TOTAL
CASTROL
CASTROL BESCO ATF III, ATF II
ESSO ATF D (DEXRON

II-D)
MOBIL ATF (DEXRON
III)
ATF HD (DEXRON
II)
SHELL DONAX TA (DEXRON
II-D)
ELFMATIC G3 (DEXRON
III)
TOTAL FLUID IID (DEXRON
II-D)
TQ-D (DEXRON
II)
TQ DEXRON III (DEXRON
III)
















Grease fitting
(Multi purpose grease) ISUZU GENUINE
EXXON / ESSO
MOBIL
CALTEX / TEXACO
SHELL
TOTAL
CASTROL BESCO L-2 GREASE (No.2), L-3 GREASE (No.3)
RONEX MP (No.2)
MOBILGREASE HP 222 (No.2)
STARPLEX-2 (No.2)
RETINAX A (No.2)
MULTIS EP2, EP3 (No.2, No.3)
LM GREASE (No.2, No.3)












Propeller shaft sliding yoke
Universal joint
Multi purpose grease
containing molybdenum
disulfide ISUZU GENUINE
EXXON / ESSO
EXXON / ESSO
CALTEX
TOTAL ONE LUBER MO GREASE
BEACON Q2 (No.2)
MULTIPURPOSE GREASE (Moly) (No.2)
MOLYTEX GREASE EP2 (No.2)
TOTAL MULTIS MS2 (No.2)








Engine cooling system ISUZU GENUINE
TEXACO


CALTEX

GM GENUINE BESCO LLC SUPER TYPE E
HAVOLINE EXTENDED LIFE ANTIFREEZE
COOLANT
HAVOLIN XLC
EXTENDED LIFE COOLANT 6280
XLC
GOODWRENCH DEX-COOL
(TM) ANTIFREEZE
EXTENDED LIFE COOLANT















FLUID TYPE
Clutch and brake fluid reservoir Besco brake fluid (For light duty)
Hydraulic brake fluid SAE J1703
FMVSS 116 DOT.3 grade


DIESEL FUEL/APPLICABLE STANDARD
JIS (JAPANESE INDUSTRIAL STANDARD) Based on K2204 GAS OIL
DIN (DEUTSCHE INDUSTRIE NORMEN) Based on EN590 : 1997
SAE (SOCIETY OF AUTOMOTIVE ENGINEERS) Based on SAE J-313C
BS (BRITISH STANDARD) Based on BS EN590 : 1997


NOTE:
Use the applicable standard or equivalent for diesel fuels.

HEATER AND AIR CONDITIONING 1-87

MAGNETIC CLUTCH
When the A/C switch and the fan control knob (fan switch) are turned on with the engine running, current flows
through the thermostat and the compressor relay to activate the magnetic clutch.
The air conditioning can be stopped by turning off the A/C switch or the fan control knob (fan switch).
However, even when the air conditioning is in operation, the electronic thermostat, the pressure switch or the ECM
is used to stop the air conditioning temporarily by turning off the magnetic clutch in the prearranged conditions to
reduce the engine load which is being caused by the rise in the engine coolant temperature, and the acceleration of
the vehicle, etc.

7A2-22 TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L)

TRANSMISSION DATA
ITEM UNIT ENGIN RUNNING AT IDLE
Current Gear 1 st/2 nd/3 rd/4 th 1 st
Target Gear 1 st/2 nd/3 rd/4 th 1 st
Vehicle Speed km/h 0 km/h
AT Output Speed (Automatic Transmission) RPM 0 RPM
AT Input Speed (Automatic Transmission) RPM 675725 RPM
Engine Speed RPM 675725 RPM
Throttle Position Sensor Signal % 0.007.00%
AT Oil Temperature (Automatic Transmission) C Depends on conditions
TCM Status Transfer Low /Transfer High Transfer HI
Desired PC Solenoid Pressure (STH) kPa 34.397.0 kPa
Desired PC Solenoid Current (STH) mA 8351020 mA
PC Solenoid Actual Current (STH) mA 8351020 mA
Gear Ratio : 1 Depends on uper hood
TCC Slip Speed RPM 0 RPM
Shift Position Actual P/R/N/L/2/3 P
Inhibitor Switch P/R/N/L/2/3 P
Transmission Check Light On/Off Off
AT Oil Temperature Lamp (Automatic
Transmission) On/Off Off
3 rd Start Lamp On/Off Off
Power Lamp On/Off Off
Shift Solenoid S1 On/Off On
Shift Solenoid S2 On/Off On
Shift Solenoid S3 On/Off Off
Diag Switch Condition On/Off Off
Power Switch On/Off Off
Brake Switch On/Off Off
Cruise Switch On/Off Off
4L Signal On/Off Off
3 rd Start Switch On/Off Off
Coolant Temperature C Depends on conditions
Torque Request (timing Retard) CA 0 CA
Garage Shift Mode On/Off Off
CAN TPS % 0.00%
CAN Signal Valid Counter (ECM)
— 0  255
CAN Signal Valid Counter (TCM) — 0  255