2004 ISUZU TF SERIES service

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-361
Step Action Value (s) Yes No
19
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-364 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
23
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:

Visual/physical inspection.

Tech 2 data.

All electrical connections within a suspected circuit
and/or system.
Was a problem found?
- Verify repair Go to Step 24
24
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 25
25
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-365
DIESELING, RUN-ON SYMPTOM
DEFINITIONS: Engine continues to run after key is
turned OFF, but runs very rough. If engine runs
smoothly, check the ignition switch and adjustment.



Step Action Value (s) Yes No
1
Was the "On-Board Diagnostic (OBD) System Check"
performed?
- Go to Step 2 Go to On Board
Diagnostic (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 visually/physical check performed?
- Go to Step 4 Go to Visual /
physical Check.
4
Check for a short between voltage circuit and the
ignition feed circuit.
Was a problem found?
- Verify repair Go to Step 5
5
Check the fuel leaking from injector. Perform the
Injector Coil/Balance Test.
Refer to 6E-106 page.
Was a problem found?
- Verify repair Go to Step 6
6
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:

Visual/physical inspection.

Tech 2 data.

All electrical connections within a suspected circuit
and/or system.
Was a problem found?
- Verify repair Go to Step 7
7
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 8
8
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-367
Step Action Value (s) Yes No
10
Check for the following engine mechanical problems
(refer to Engine Mechanical):

Low compression.

Leaking cylinder head gaskets.

Worn camshaft.

Sticking or leaking valves.

Valve timing.

Broken valve springs.

Camshaft drive belt slipped or stripped.
Was a problem found?
- Verify repair Go to Step 11
11
Check the intake and exhaust manifold for casting
flash. Refer to Engine Mechanical.
Was a problem found?
- Verify repair Go to Step 12
12
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:

Visual/physical inspection.

Tech 2 data.

All electrical connections within a suspected circuit
and/or system.
Was a problem found?
- Verify repair Go to Step 13
13
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 14
14
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the Immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-368 3.5L ENGINE DRIVEABILITY AND EMISSIONS
ON-VEHICLE SERVICE PROCEDURE
ENGINE CONTROL MODULE (ECM)
NOTE:
To prevent possible electrostatic discharge
damage, follow these guidelines:

Do not touch the control module connector pins
or soldered components on the control module
circuit board.

Do not open the replacement part package until
the par is ready to be installed.

Before removing the part from the package,
ground the package to a known good ground on
the vehicle.

If the part has been handled while sliding across
the seat, or while sitting down from a standing
position, or while walking a distance, touch a
known good ground before installing the part.

NOTE:
To prevent internal ECM damage, the ignition must
be in the "OFF" position in order to disconnect o
r
reconnect power to the ECM (for example: battery
cable, ECM pigtail, ECM fuse, jumper cables, etc.).

NOTE:
When replacing the production ECM with a service
ECM, it is important to transfer the broadcast code
and production ECM number to the service ECM
label. This will allow positive identification of ECM
parts throughout the service life of the vehicle.

Location
On the common chamber.

Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the two connectors from the ECM.
3. Remove four bolts.
4. Remove the ECM from common chamber.






Installation Procedure
1. Put on the ECM on the common chamber.
2. Tighten the ECM by four bolts.
3. Connect the two connectors to the ECM.
4. Connect the negative battery cable.

NOTE:
The replacement ECM must be programmed.
Service Programming System (SPS) and
Immobilizer programming (if equipped) is
/are
necessary. In case "SPS procedure does not
succeed" or "engine does not run but No DTC afte
r
SPS", low vehicle battery voltage or disconnected
electrical connector (e.g. poor connection of data
link connector) are supposed. Perform the SPS
procedure once again by correct conditions. The
programming ECM will be recovered normally.

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-373
Inspection
 Inspect the louvered end of the sensor for grease,
dirt, excessive carbon build up or othe
r
contamination.
 A special anti-seize compound is used on the O2
sensor threads. This compound consists of glass
breads suspended in a liquid graphite solution.
The graphite burns away with engine heat, but the
glass breads will remain, marking the senso
r
easier to remove.
 New or service sensors will already have the
compound applied to the threads. If a sensor is
removed and is to be reinstalled for any reason,
the threads must have anti-seize compound
applied.


Installation Procedure
1. Install the O2 sensor to the exhaust pipe.
Apply anti-seize compound or the equivalent to the
threads of the oxygen sensor, if necessary.
2. Tighten the O2 sensor with specified tightening
torque.
Tightening Torque





Bolt: 42N




m (4.3kgf




m)
3. Connect a sensor connector to the O2 sensor.
4. Connect the negative battery cable.

NOTE:
Verify any DTCs (diagnosis Trouble Code) are not
stored after replacement.
Verify no exhaust gas leaking from the senso
r
threads after replacement.



EVAP CANISTER PURGE VALVE
SOLENOID

Location
On the intake manifold.

Removal Procedure
1. Disconenct the negative battery cable.
2. Disconnect a purge solenoid connector from the
purge solenoid.
3. Disconnect two hoses from the purge solenoid
valve.
4. Loosen a bolt and remove the purge solenoid from
the intake manifold.






Installation Procedure
1. Put on the purge solenoid on the intake manifold.
2. Tighten the purge solenoid by a bolt.
3. Connect a connector to the purge solenoid.
4. Connect two hoses to the purge solenoid valve.
5. Connect the negative battery cable.

NOTE:
Verify any DTCs (diagnosis Trouble Code) are not
stored after replacement.
Verify proper connection of two hoses.

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-375
3. Install the common chamber. Refer to common
chamber in engine Mechanical.




060RW044
4. Connect the vacuum hose on Canister Solenoid
and positive crankcase ventilation hose.
5. Connect the connectors to, solenoid valve.
6. Connect the accelerator pedal cable to throttle
body and cable bracket.
7. Install the engine cover.
8. Connect the negative battery cable.
9. Crank the engine until it starts. Cranking the
engine may take longer than usual due to trapped
air in the fuel rail and in the injectors.

FUEL INJECTORS

Removal Procedure
NOTE: If the fuel injectors are leaking, the engine oil
may be contaminated with fuel. Check the oil fo
r
signs of contamination and change the oil and the
filter if necessary.
NOTE: Use care in removing the fuel injectors in
order to prevent damage to the fuel injecto
r
electrical connector pins or the fuel injector
nozzles. The fuel injector is an electrical component
and should not be immersed in any type of cleane
r
as this may damage the fuel injector.
Important: Fuel injectors are serviced as a complete
assembly only.
1. Disconnect the negative battery cable.
2. Remove the upper intake manifold. Refer to
Common Chamber in Engine Mechanical..
3. Remove the fuel rail. Refer to Fuel Rail.




060RW044

ENGINE EXHAUST (6VE1 3.5L) 6F-1
ENGINE
ENGINE EXHAUST (6VE1 3.5L)
CONTENTS

Service Precaution................................................. 6F-1
General Description............................................... 6F-2
Three Way Catalytic Converter and Center
Exhaust Pipe.......................................................... 6F-3
Three Way Catalytic Converter and Center
Exhaust Pipe and Associated Parts................ 6F-3
Removal............................................................... 6F-3

Installation............................................................. 6F-3
Exhaust Silencer and Rear Exhaust Pipe........... 6F-4
Exhaust Silencer and Rear Exhaust Pipe and
Associated Parts................................................. 6F-4
Removal................................................................ 6F-4
Installation............................................................. 6F-4
Main Data and Specifications................................ 6F-5


Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFE
R
TO THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM
REPAIRS.


CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, o
r
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.