engine ISUZU TF SERIES 2004 Repair Manual

CAB 10-5



Important Operations - Installation
1. Engine Hood Rear Seal
Install the engine hood rear seal as shown in the illustration.
1 : Seal
2 : Clip
3 : Rear (windshield glass side)
4 : Front

RTW3A0SH000201

3. Windshield Glass
1) Clean the windshield glass bonding surface.
2) Use a soft rag and unleaded gasoline to wipe off an
y
adhesive remaining on the body.
3) Mount the body window glass as shown in the illustration.
Attach spacers at five locations.


Always use new spacer.
4) Install the windshield upper molding.


Peel off the tear-away paper from the windshield uppe
r
molding, and start applying it with one end of the glass
and cut away the surplus at the other end of the glass
for length adjustment.


Always use new upper molding.
5) Temporary install the windshield support.



6) Apply primer
1 Sunstar #435-98 or equivalent to the body
side bonding surface. The primer should extend at least 25
mm (1 in).
Apply primer Sunstar #435-40 or equivalent to the
windshield glass side bonding surface.
The primer should extend 16.5 mm (0.6 in) and 25 mm (1.0
in) from end of the glass.

CAB 10-29

Important Operations
1. Front Console Assembly


Refer to Floor Consol in this section.



2. Glove Box


Remove 2 fixing screws and pulling the handle.



3. Instrument Panel Driver Lower Cover Assembly
1) Remove the engine hood opener 2 fixing screws.
2) Remove the lower cover one fixing screw.
3) Pull out the cover (Stick type parking brake only).
4) Pull out the lower cover assembly.




4. Driver Knee Bolster Assembly


Remove 4 fixing bolts.
Caution:
For precaution on installation or removal of SRS-air bag
system, refer to section 9 “Supplemental Restraint System
(SRS) - AIR BAG”

5. Driver Air Bag
6. Steering Wheel/Steering Cowl


Refer to Section 3B “STEERING COLUMN” for steering
lock assembly removal steps.




7. Meter Cluster Assembly


Pull out the 4 clip positions.

7C-2 CLUTCH
MAIN DATA AND SPECIFICATIONS
ENGINE 6VE1
4JA1-T(L) 4JA1-TC
4JH1-TC C24SE
Clutch type Dry single plate with diaphragm
Size mm (in)260 (10.24) 225 (8.86) 250 (9.84) 240 (9.45)
Clamping force kg(lb)735 (1621) 500 (1103) 640 (1411) 560 (1235)
(N)(7200) (4900) (6300) (5500)
Pressure plate
Outside diameter mm(in)260 (10.24) 225 (8.86) 250 (9.84) 240 (9.45)
Inside diameter mm(in)170 (6.69) 150 (5.906) 160 (6.299) 160 (6.299)
Driven plate
Thickness mm(in)
at free 8.8 (0.346) 8.4 (0.331) 8.3 (0.327) 8.7 (0.342)
at compressed 8.2 (0.323) 7.8 (0.307) 7.8 (0.307) 8.0 (0.315)
Clutch Cont. type Hydraulic
Pedal free play mm(in)5.0-15.0 (0.2-0.6)
Master cylinder
Bore

Stroke mm(in)15.87

35 (0.625

1.38)
Slave cylinder
Bore

Stroke mm(in)22.22

18.9
(0.875

0.744) 19.05

23
(0.749

0.906) 20.64

23
(0.813

0.906) 19.05

23
(0.749

0.906)

7C-4 CLUTCH
The clutch assembly consists of the pressure plate, the clutch cover, the diaphragm spring pivot pin and the driven
plate assembly.
The clutch pedal is connected to the release bearing through the shift fork.
The driven plate assembly is installed between the flywheel and the pressure plate.
For 4J series engine and HEC engine models, the push-type clutch is used.
Diaphragm spring pressure holds the driven plate against flywheel and the pressure plate to provide the friction
necessary to engage the clutch.
Depressing the clutch pedal moves the shift fork against the release bearing.
The release bearing forces the diaphragm to overcome the force of the diaphragm spring and separate the driven
plate from the flywheel and pressure plate to disengage the clutch.
For 6VE1 engine model, the pull-type clutch is used. The pull-type clutch is disengaged by pulling the release lever
(release bearing) to disengage the pressure plate.

8A-2 ELECTRICAL-BODY AND CHASSIS
PAGE
Fuse and Slow Blow Fuse Location (Relay and Fuse Box) .................................... 8A- 31
Fuse Location ............................................................................................................. 8A- 33
Diode Location ........................................................................................................... 8A- 34
Fuse Block Circuit ...................................................................................................... 8A- 35
Fuse Block Circuit (C24SE) ....................................................................................... 8A- 35
Fuse Block Circuit (6VE1) ......................................................................................... 8A- 37
Fuse Block Circuit (4JA1-TC/4JH1-TC) - RHD ......................................................... 8A- 39
Fuse Block Circuit (4JA1-TC/4JH1-TC) – LHD ......................................................... 8A- 41
Fuse Block Circuit (4JH1-L) ...................................................................................... 8A- 43
Grounding Point ............................................................................................................. 8A- 45
Ground Point .............................................................................................................. 8A- 45
Ground Point Location .............................................................................................. 8A- 61
Main Cable harness Routing .......................................................................................... 8A- 63
C24SE / 6VE1 / 4JA1-L / 4JH1-TC .............................................................................. 8A- 63
Instrument Harness .................................................................................................... 8A- 71
System Repair .................................................................................................................8A- 73
Start and Charging ..................................................................................................... 8A- 73
Engine Control Module (ECM) ................................................................................... 8A- 89
Exhaust Gas Recalculation (EGR): 4JA1-L Only ...................................................... 8A- 109
Lighting ....................................................................................................................... 8A- 114
Front Fog Light ........................................................................................................... 8A- 136
Rear Fog Light ............................................................................................................ 8A- 144
Head Light Leveling ................................................................................................... 8A- 149
Illumination ................................................................................................................. 8A- 154
Hazard Warning Flasher, Turn Signal Light, Back Up Light,
Horn and Stop Light ................................................................................................. 8A- 161
Dome Light, Spot Light and Warning Buzzer .......................................................... 8A- 181
Windshield Wiper and Washer .................................................................................. 8A- 196
Transmission Control Module (TCM) ....................................................................... 8A- 214
Meter, Warning Light and Indicator Light ................................................................ 8A- 223
Heater and Air Conditioning ...................................................................................... 8A- 281
Power Door Lock ....................................................................................................... 8A- 293

8A-4 ELECTRICAL-BODY AND CHASSIS
GENERAL INFORMATION
The body and chassis electrical system operates on a twelve volt power supply with negative ground polarity.
The main harness consists of the engine harness, the instrument harness, the body harness, and the chassis
harness.
The harnesses use a split corrugated tube to protect the wires from the elements.
Wire size is determined by current flow, circuit length, and voltage drop.
All wires have color-coded insulation.
Wire color-codes are shown in the circuit diagrams.
This makes it easier to trace circuits and to make the proper connections.
Each circuit consists of the following:
1. Power source - The battery and the alternator
2. Wires - To carry electrical current through the circuit
3. Fuses - To protect the circuit against current overload
4. Relays - To protect voltage drop between the battery and the circuit parts and to protect the switch points against
burning
5. Switches - To open and close the circuit
6. Load - Any device, such as a light or motor, which converts the electrical current into useful work
7. Ground - To allow the current to flow back to the power source

8A-8 ELECTRICAL-BODY AND CHASSIS


3. Use a grommet or guard tube to protect the wiring harness
from contacting a sharp edge or surface.



4. Position the wiring harness with enough clearance from the
other parts and guard the wiring harness with a vinyl tube to
avoid direct contact.



5. The wiring harness between engine and chassis should be
long enough to prevent chafing or damage due to various
vibrations.

8A-12 ELECTRICAL-BODY AND CHASSIS
ABBREVIATIONS
Abbreviation Meaning of abbreviation Abbreviation Meaning of abbreviation
A Ampere (S) LH Left hand
ABS Anti-lock brake system LWB Long wheel base
ASM Assembly MPI Multipart fuel injection
AC Alternating current M/T Manual transmission
A/C Air conditioner QOS Quick On Start system
ACC Accessories RH Right hand
CARB Carburetor RR Rear
C/B Circuit breaker RWAL Rear wheel anti-lock brake system
CSD Cold start device SRS Supplemental restraint system
DIS Direct ignition system ST Start
EBCM Electronic brake control module STD Standard
ECGI Electronic control gasoline injection SW Switch
ECM Engine control module SWB Short wheel base
ECU Electronic control unit TCM Transmission control module
EFE Early fuel evaporation V Volt
42 Two-wheel drive VSV Vacuum switching valve
44 Four-wheel drive W Watt (S)
FL Fusible link WOT Wide open throttle
FRT Front W/ With
H/L Headlight W/O Without
IC Integrated circuit
IG Ignition
kW Kilowatt

ELECTRICAL-BODY AND CHASSIS 8A-19
Battery-1

BATTERY
Inspection
1. Check the battery terminals 1 for corrosion.
2. Check the battery cables
2 for looseness.
3. Check the battery case
3 for cracks and other damage.
4. Check the battery electrolyte level.

Battery-2

Battery Replacement
1. Disconnect the battery ground cable 1.
2. Disconnect the battery positive cable
2.
3. Remove the battery clamp
3.
4. Remove the battery
Caution:
It is important that the battery ground cable be removed
first.
Removing the battery positive cable first can result in a
short circuit.


Jump Starting the Engine with a Booster Battery
The following description assumes that you are using a booster
battery mounted on a second vehicle.
The listed steps (with some minor modifications) are also
applicable if you are using a naked booster battery or special
battery charging equipment.

8A-20 ELECTRICAL-BODY AND CHASSIS

Caution:
Never push or tow the vehicle in an attempt to start it.
Extensive damage to the emission system and other
vehicle parts will result.
(Only catalytic converter vehicle)
Treat both the discharged battery and the booster battery
with great care when using jumper cables.
Carefully follow the procedure outlined below.
Always be aware of the dangers of sparking.
Failure to follow the following procedure can result in:
a. Serious personal injury, specially to your eyes.
b. Extensive property damage from a battery explosion,
battery acid discharge, or electrical file.
c. Extensive damage to the electronic components o
f
both vehicles.
Do not use a 24 volt booster battery.
Serious damage to the vehicle's electrical system and
electronic components will result.

Jump Starting Procedure
1. Set the parking brake on both vehicles.
2. If one or both vehicles is equipped with a manual
transmission, place the gear shift in the "NEUTRAL"
position.
3. Turn off the ignition on both vehicles.
4. Turn off all vehicle lights and accessories.
5 Be sure that the two vehicles are not touching.

Attach the end of one jumper cable to the booster battery
positive terminal.
6
Attach the other end of the same cable to the discharged
battery positive terminal.
7. Once again, check that the booster battery has a 12 vol
t
rating.
8.
Attach one end of the remaining booster cable to the
booster battery negative terminal.
9.
Attach the other end of the booster cable to a solid ground
(such as the air conditioner compressor mounting bracke
t
or the alternator mounting bracket) in the engine room o
f
the vehicle with the discharged battery.
Be sure that the ground connection is at least 500 mm (20
in) from the discharged battery.