2004 ISUZU TF SERIES fuel filter

ENGINE DRIVEABILITY AND EMISSIONS 6E–249
10 Check items that can cause the engine to run rich.
Refer to DTC P1167 “Fuel Supply System Rich During
Deceleration Fuel Cut Off”.
Was a problem found?—Verify repair Go to Step 11
11 Monitor “B1S1 (Bank 1 Sensor 1) Status” on the Tech
2.
Is the “B1S1 (Bank 1 Sensor 1) Status” in the lean
condition?—Go to Step 12Go to Step 13
12 Check items that can cause the engine to run lean.
Refer to DTC P1171 “Fuel Supply System Lean
During Power Enrichment”.
Was a problem found?—Verify repair Go to Step 13
13 1. Visually/physically inspect for the following
conditions:
Restriction of air intake system. Check for a
restricted air filter element, or foreign objects
blocking the air intake system.
Check for objects blocking the IAC passage or
throttle bore, excessive deposits in the throttle
bore and on the throttle plate.
Check for a condition that causes a large
vacuum leak, such as an incorrectly installed or
faulty crankcase ventilation hose/brake booster
hose.
Was a problem found?—Verify repair Go to Step 14
14 Check the injector connectors, if any of the injectors
are connected an incorrect cylinder, correct as
necessary.
Was a problem found?—Verify repair Go to Step 15
15 Perform the “Injector Coil/Balance Test” (Refer to 6E-
98 page).
Was a problem found.—Verify repair Go to Step 16
16 1. Check for fuel in the pressure regulator vacuum
hose.
2. If fuel is present, replace the fuel pressure
regulator assembly.
Was a problem found?—Verify repair Go to Step 17
17 Check for proper ignition voltage output with the spark
tester.
Was a problem found?—Verify repair Go to Step 18
18 1. Remove the spark plugs and check for gas or oil
fouling cracks, wear, improper gap, burned
electrodes, heavy deposits, or improper heat
range.
2. If spark plugs are fouled, the cause of fouling must
be determined before replacing the spark plugs.
Was a problem found?—Verify repair Go to Step 19 Step Action Value(s) Yes No

ENGINE DRIVEABILITY AND EMISSIONS 6E–251
LACK OF POWER, SLUGGISH OR SPONGY SYMPTOM
DEFINITIONS: Engine delivers less than ex pected power. Attempting part-throttle acceleration results in little or no
increase in vehicle speed.
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 1. Remove and check the air filter element for dirt or
restrictions.
2. Replace the air filter element if necessary.
Was a repair required?—Verify repair Go to Step 5
5 Check the ECM grounds to verify that they are clean
and tight. Refer to the ECM wiring diagrams.
Was a problem found?—Verify repair Go to Step 6
6 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 7
7 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 8
8 Observe the throttle position display on the Tech 2
while slowly increasing throttle pedal.
Does the throttle position increase steady with
increasing smoothly?
—Go to Step 9Refer to
Diagnostic
Trouble Code
P0123 for
further
diagnosis
9 Check the knock sensor wire, shield wire, or
installation condition.
Was a problem found?—Verify repair Go to Step 10
10 Run Engine.
Check the fuel control Heated Ox ygen Sensor
(HO2S). When monitored on the Tech 2, the HO2S
should respond quickly to different throttle positions. If
it doesn’t check for silicon or other contaminates from
fuel or use of improper sealant. The sensors may
have a white powdery coating. Silicon contamination
sends a rich ex haust signal which causes the ECM to
command and excessively lean air/fuel mix ture.
Was a problem found?—Verify repair Go to Step 11
11 Check the fuel pressure. Refer to
Fuel System
Diagnosis
6E-108.
Was a problem found?—Verify repair Go to Step 12

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

6E–272 ENGINE DRIVEABILITY AND EMISSIONS
FUEL INJECTOR
Removal Procedure
NOTE: If the fuel injectors are leaking, the engine oil
may be contaminated with fuel. Check the oil for signs
of contamination and change the oil and filter if
necessary.
NOTE: Use care in removing the fuel injector in order to
prevent damage to the fuel injector al connector pins or
fuel injector nozzles. The fuel injector is an al
component and should not be immersed in any type of
cleaner as this may damage the fuel injector.
Important: Fuel injectors are serviced as complete
assembly only.
1. Disconnect the negative battery cable.
2. Disconnect al connector from fuel injector.
3. Remove the fuel rail. Refer to Fuel Rail Removal
Procedure.
4. Remove the fuel injector retainer clip.
5. Remove the fuel injector assembly from fuel rail.
6. Remove O-ring from the fuel injector.
7. Remove O-ring backup from fuel injector.Inspection
1. Inspect O-ring for crack, damage or leaks.
2. Replace worn or damaged O-ring.
3. Lubricate the new O-rings with engine oil before
installation.
Installation Procedure
1. Lubricate the new O-ring with engine oil.
2. Install the O-ring backup on the fuel injector.
3. Install new O-ring on the fuel injector.
4. Install all four injector on the fuel rail.
5. Use new injector retainer clip to retain the injetor to
the fuel rail.
6. Coat the end of the fuel injector with engine oil.

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