clutch ISUZU TF SERIES 2004 Manual PDF

8B-10 CRUISE CONTROL SYSTEM
Diagnosis
The cruise control unit uses the cruise main indicator light and diagnosis the failure, when the control unit detects
abnormality on the table below.

PART POSSIBLE CAUSE DETECTION PERIOD DTC
Actuator Motor system short circuit Energizing motor 1-1
Clutch system short circuit Energizing clutch 1-2
Clutch system open circuit Energizing clutch 1-2
Mechanical defect Cruise controlling 1-3
Close side of motor system open circuit Cruise controlling 1-1
Cruise control unit Close side of motor system open circuit While starter sw on 1-4
Clutch output abnormality While starter sw on 1-4
Vehicle speed sensor Signal of vehicle speed disconnection Cruise controlling 2-1
Signal of vehicle speed abnormality Cruise controlling 2-1
Switch Turning on switch at all times While starter sw on 3-1
Turning on switch at the same time While starter sw on 3-1
DTC : Diagnostic Trouble Code

DTC Display Condition
1. With the vehicle stationary and the ignition ON, activate the ‘Cruise Cancel’ switch three times within 2 seconds.
2. If there are no DTC’s stored in the Cruise control unit, the LED on the Cruise Main switch will blink rapidly (2Hz).
3. Any DTC’s stored in the Cruise control unit will be displayed by the CRUISE SET warning lamp in the meter
cluster.
4. Read the set DTC’s by referring to then charts on this page.

NOTE:

The DTC display mode will be aborted if either the vehicle speed rises above 10km/h or the RESUME switch is
operated.

The control module stores the DTC in a ‘volatile’ memory – that is the memory is only active while the ignition is
ON.
Turning the ignition to the OFF position will clesr any stored DTC’s.

8B-14 CRUISE CONTROL SYSTEM
DTC 1–2 Clutch System Open or Short Circuit

Step Action Value(s) YES NO
1
1. Turn the starter switch off.
2. Disconnect the actuator connector C–119.
3. Measure resistance between actuator side
connector terminal 3 and 4.
Is there resistance within range specified in the
value(s) column?



34.7 –
42.4




Go to Step 2



Replace the
actuator
2
1. Disconnect the brake switch connector C–44.
2. Check continuity between switch side connector
terminal 3 and 4.
Is there continuity between terminals?


—


Go to Step 3

Replace the
switch
3
1. Reconnect the brake switch connector C–44.
2. Check continuity between harness side connector
C–120 terminal 6 and connector C–44 terminal 3,
connector C–119 terminal 4 and connector C–120
terminal 8.
Is there continuity between terminals?




—




Go to Step 4



Replace open
circuit
4 Check continuity between harness side connector
C–119 terminal 3 and the ground, connector C–119
terminal 4 and the ground, connector C–120
terminal 6 and the ground.
Are the results same as specified in the value(s)
column?



No
continuity



Replace the
control unit



Repair short
circuit

TROUBLESHOOTING 6 – 9
6. Overheating
Step Action Value(s) Yes No
1 Was the engine coolant level OK? —
Go to Step 2 Replenish the
coolant
2 Was the water leakage or the radiator restriction
found? (Include radiator cap) — Repair or
replace the
leakage part. Go to Step 3
3 Was the fan belt slippage found? — Tension or
replace the fan
belt. Go to Step 4
4 Was the fan clutch working completely? —
Go to Step 5 Replace the
fan clutch
assembly.
5 Was the oil leakage found from fan clutch? — Replace the
fan clutch
assembly Go to Step 6
6 Was the thermostat working normally? —
Go to Step 7 Replace the
thermostat.
7 Was the water pump working OK? —
Go to Step 8 Replace the
water pump
assembly.
8 Was the restriction by the foreign materials in the
cooling system found? For example, clog the water
hose between the cylinder body and radiator etc.. — Clean or
replace the
clog part. Go to Step 9
9 Was the water leakage found from the sealing cap
on the cylinder body? — Replace the
sealing cap or
replace the
cylinder body. Go to Step 10
10 Are any DTC stored? — Go to indicated
DTC. Solved

7. White Exhaust Smoke
Step Action Value(s) Yes No
1 Was the compression pressure OK? 3.0 MPa
(31.0 kg/cm2,
441 psi) at
200 rpm
Go to Step 2 Readjust the
valve clearance
or replace the
cylinder head
gasket or
cylinder liner or
piston or piston
ring or valve
and relation
parts.
2 Was the PCV (Positive Crankcase Ventilation) valve
working completely? —
Go to Step 3 Repair or
replace the
PCV valve.
3 Was the turbocharger working completely? —
Go to Step 4 Replace the
turbocharger.
4 Are any DTC stored? — Go to indicated
DTC Solved

TROUBLESHOOTING 6 – 19
15. Starter Motor Problem
Visual/physical check the following items before diagnosis.
The battery terminals connection condition.
The ground connection condition.
The starter motor or the battery fastener condition.
The battery fluid level and specific gravity.
15-1 Starter motor pinion engages to ring gear but engine does not turn over
Step Action Value(s) Yes No
1 Was “Visual/Physical Check" performed.
—
Go to Step 2 Go to
visual/physical
check
2 Check the contact condition between the brush and
the commutator.
Was the brush and the commutator contact
intermittent? — Replace the
brush or repair
the
commutator. Go to Step 3
3 Were the brush and the commutator contact faces
dirty?
—
Clean contact
face Go to Step 4
4 Was the pinion clutch slipped? — Replace the
pinion clutch Go to Step 5
5 Inspect the armature field coil.
Was there an open circuit or a short circuit in the
armature field coil? — Repair or
replace the
armature field
coil. Go to Step 6
6 Are any DTC stored? — Go to indicated
DTC. Solved

15-2 Incorrect pinion and ring gear engagement
Step Action Value(s) Yes No
1 Was “Visual/Physical Check" performed.
—
Go to Step 2 Go to
visual/physical
check
2 Inspect the pinion and the ring gear teeth.
Were the pinion and/or the ring gear teeth worn or
broken? —
Replace the
wron parts. Go to Step 3
3 Inspect the pinion gear return movement.
Was the pinion gear return movement incorrect? — Adjust or
replace the
movement
parts. Go to Step 4
4 Are any DTC stored? — Go to indicated
DTC. Solved

6A – 38 ENGINE MECHANICAL
6. Front propeller shaft (for 4x4 model)
Remove the spline yoke flange bolt at the transfer output
shaft.
Do not allow the spline yoke to fall away from the front
propeller shaft.
If the spline yoke should fall away from the front propeller
shaft, align the setting marks on the spline yoke and the
propeller shaft to reassemble the two marks. The setting
marks are punched circles approx. 3mm (0.12 in) in
diameter.

7. Clutch slave cylinder (for M/T model)
8. ATF pipe (for A/T model)
9 Shift control cable (for A/T model)
10. Transmission sensor harness
Remove the vehicle speed sensor connector, inhibitor
switch connector (A/T), ATF temperature sensor
connector, back up light switch connector (M/T) from
transmission.
11. Breather hose (for A/T model)
12. Transmission shift lever (for M/T model)
Remove the shift lever from the floor.
13. Transfer shift lever (for 4x4 model)
Remove the shift lever from the floor.

14. Transmission member
1) Support the transmission with the transmission jack.
2) Remove the transmission member mounting bolts
fixing the transmission member to the chassis frame.


15. Torque converter bolt (for A/T model)
1) Remove the under cover under the torque converter
housing.
2) Rotate the flywheel by using tire lever or some other
tool, and then remove the torque converter bolts.
16. Transmission coupling bolt
1) Support the engine with the garage jack.
2) Use the jack to slightly lower the transmission.
3) Remove the transmission coupling bolts.
17. Transmission (and transfer)
Separate the transmission (and transfer) from the
engine.Take care not to damage the transmission, the
engine, and their related parts..

F06R300007 P1010025

ENGINE MECHANICAL 6A – 41

















































Coolant Replenishment
Warning:
When the coolant is heated to a high temperature, be
sure not to loosen or remove the rediator cap.
Otherwise you might get scalded by hot vapor or
boiling water.
To open the radiator cap, put a piece of thick cloth on
the cap and loosen the cap slowly to reduce the
pressure when the coolant has become cooler.
1. Open rediator cap pour coolant up to filler neck
2. Pour coolant into reservoir tank up to "MAX" line
3. Tighten radiator cap and start the engine. After idling
for 2 to 3 minutes, stop the engine and reopen radiator
cap. If the water level is lower, replenish.
4. After replenish the coolant tighten radiator cap, warm
up the engine at about 2000 rpm. Set heater
adjustment to the highest temperature position, and let
the coolant circulate also into heater water system.
5. Check to see the thermometer, continuously idling 5
minutes and stop the engine.
6. When the engine has been cooled, check filler neck for
water level and replenish if required. Should extreme
shortage of coolant is found, check the coolant system
and reservoir tank hose for leakage.
7. Pour coolant into the reservoir tank up to "MAX" line.

Coolant Capacity lit (US/UK gal)

4JA1 / TC 9.4 (2.5 / 2.1)
4JH1TC M/T: 10.1 (2.7 / 2.2)
A/T: 10.0 (2.6 / 2.2)

9.5 (2.5/2.1)
























Engine Warm-Up
After completing the required maintenance procedures,
start the engine and allow it to idle until it is warm.
Check the following:
1. Engine idling speed.
2. Engine noise level.
3. Engine lubricating system and cooling system.
Carefully check for oil and coolant leakage.
4. Clutch engagement.
5. Transmission operation.
6. Indicator warning light operation.

ENGINE MECHANICAL 6A – 43

ENGINE OVERHAUL
REMOVAL
EXTERNAL PARTS


RTW36AMF000401

Removal Steps
1. Clutch Assembly or Flex Plate
2. Intake Pipe and Throttle Body
3-1. EGR Pipe
3-2. EGR cooler (EURO III model only)
4. EGR Valve
5. Oil Level Gauge
6. Fuel Filter Assembly (Except EURO III)
7. Fuel Filter Bracket (Except EURO III)
8. Fuel Injection Pipe with Clip
9. Power Steering Oil Pump Bracket
10. Intake Manifold
11. Engine Mounting Bracket and Foot
12. Injection Pump Cover
13. Injection Pump
14. Starter Motor
15. Oil Pressure Warning Switch
16. Fuel Leak Off Pipe
17. Oil Cooler Water Pipe
18. Cooling Fan Pulley
19. Heat Protector
20. Catalytic Converter
21. Turbocharger
22. Compressor Bracket
23. Vacuum Pump Oil Return Hose
24. Generator and Adjusting Plate
25. Water Inlet Pipe
26. Generator Bracket
27. Oil Cooler with Oil Filter
28. Exhaust Manifold

6A – 44 ENGINE MECHANICAL
Removal
1. Clutch Assembly or Flex Plate
Remove the clutch assembly or the flex plate.



4JA1L RTW46ASH000801
2. Intake Pipe and Throttle Body (4JA1TC/4JH1TC only)
1) Loosen hose clamp between turbocharger and intake
duct.
2) Remove the rubber hose.
3) Remove the intake pipe and the throttle body.
(4JA1TC/4JH1TC only)

RTW36ASH000201




4JA1L
025R100008
3-1. EGR Pipe
1) Remove two bolts from the exhaust manifold.
2) Remove two nuts from the EGR valve adapter.
3) Remove the EGR pipe with gaskets.

RTW36ASH000301


3-2. EGR Cooler (EURO III model only) 4JA1TC/4JH1TC
4JH1TC

6A – 86 ENGINE MECHANICAL





Ring Gear Replacement
Ring Gear Removal
Strike around the edges of the ring gear with a hammer and
chisel to remove it.




Ring Gear Installation
1. Heat the ring gear evenly with a gas burner to invite
thermal expansion.
Do not allow the temperature of the gas burner to exceed
200
C (390
F).
2. Install the ring gear when it is sufficiently heated.
The ring gear must be installed with the chamfer facing the
clutch.






PISTON
Piston Grade Selection and Cylinder Bore
Measurement
Refer to the Section "Cylinder Body", Item "Cylinder Liner Bore
Measurement" for details on piston grade selection and
cylinder liner bore measurement.





Piston Ring Gap
1. Insert the piston ring horizontally (in the position it would
assume if it were installed to the piston) into the cylinder
liner.




2. Push the piston ring into the cylinder bore until it reaches
the measuring point 1 or 2 where the cylinder liner bore is
the smallest.
Do not allow the piston ring to slant to one side or the
other. It must be perfectly horizontal.
Measuring Point 1 10 mm (0.4 in)
or
Measuring Point 2 120 mm (4.7 in)



020LX008
020LX009
015LX023
015RY00020

6A – 118 ENGINE MECHANICAL

INSTALLATION
EXTERNAL PARTS





RTW36AMF000701
Installation Steps
1.
Exhaust Manifold 18. Engine Mounting Bracket and
2.
Oil Cooler with Oil Filter Foot
3. Generator Bracket 19. Intake Manifold
4. Water Inlet Pipe 20. Power Steering Oil Pump
5.
Generator and Adjusting Plate Bracket
6.
Vacuum Pump Oil Return Hose 21. Fuel Injection Pipe with Clip
7.
Compressor Bracket 22. Fuel Filter Bracket (Except
EURO III)
8. Turbocharger 23. Fuel Filter Assembly (Except
EURO III)
9. Catalytic Converter 24. Oil Level Gauge
10. Heat Protector 25. EGR Valve
11. Cooling Fan Pulley 26-1. EGR Pipe
12. Oil Cooler Water Pipe 26-2. EGR Cooler (EURO III model
only)
13. Fuel Leak Off Pipe 27. Intake Pipe and Throttle Body
(4JA1TC/4JH1TC only)
14. Oil Pressure Warning Switch 28. Clutch Assembly or Flex Plate
15. Starter Motor
16. Injection Pump
17. Injection Pump Cover