ISUZU KB P190 2007 Workshop Repair Manual

PARKING BRAKE SYSTEM 5D-11
Inspection and Repair
Brake Lining Inspection
Check the shoe assemblies for wear by removing the
brake drum.
Replace the shoe assemblies if the lining thickness is
less than 1.0 mm (0.039 in).
Minimum limit: 1.0 mm (0.039 in)








308RS004
Parking Brake Adjustment
NOTE: All brakes are self-adjusting. Brakes are
adjusted by repeated stepping on the brake pedal.
(After stepping on the pedal and releasing it, the rea
r
brake auto-adjuster produces a clicking sound. The
same operation should be repeated until the sound
disappears.)
Take the following steps after overhauling the rea
r
brake assembly.
1. Move the parking brake lever to its fully released position.
2. Parking brake cable must be loosened sufficiently.
(Loosen the adjust nut.)
3. Repeat stepping on the brake pedal firmly, and releasing it until the clicking sound can no longe
r
be heard.
If the difference between the brake drum inside
diameter and the brake shoes external diameter is
adjusted to be 0.4 mm (0.0157 in), the number o
f
times for depressing the brake pedal can be
reduced.

4. Remove the drum. Measure the brake drum inside
diameter and the brake shoes external diameter.
Total shoe clearance: 0.4 mm (0.0157 in)
If incorrect, readjust the brake shoe clearance.
5. Rotate the adjust nut of hand brake lever until all slack disappears from the cable. Set the adjust
nut.
6. After the rear brake shoe/drum gap has been adjusted, perform parking brake cable adjustment.
7. Turn the adjusting nut so that the parking brake lever travels 6 −9 notches (Bucket Seat) or 8 −14
notches (Bench Seat) when pulled up with a force
of 294 N (30 kg/66 lb).
8. Make sure there is no brake dragging.



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5D-12 PARKING BRAKE SYSTEM
Main Data and Specifications
General Specifications

Type Leading-Trailing
Drum inside diameter 254 mm (10 in) or 295 mm (11.6 in)
Parking brake lever stroke
6−9 notches; Bucket Seat
8 −14 notches; Bench Seat
W hen pulled with a force of 294 N (30 kg/66 lb)


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PARKING BRAKE SYSTEM 5D-13
Torque Specifications
N⋅
⋅⋅
⋅
m (kgf ⋅
⋅⋅
⋅
m/lb ⋅
⋅⋅
⋅
ft)

This illustration is based on the RHD model
RTW 35DSF000201

N⋅
⋅⋅
⋅
m (kgf ⋅
⋅⋅
⋅
m/lb ⋅
⋅⋅
⋅
ft)



E05R300006



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SECTION 6
ENGINE
TA BLE OF CONTENTS
ENGINE 6
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ISUZU KB P190 2007
4JA1/4JH1 MODELS 4JK1/4JJ1 MODELS


C24SE MODEL HFV6 MODEL

Section 6 Troubleshooting ....................................................................................... ..... 786
PAGE
Section 6A Engine Mechanical .................................................................................... 806
Section 6B Engine Cooling .......................................................................... ................ 945
Section 6C Fuel System .......................................................................... ..................... 96 5
Section 6D Engine Electrical ................................................................ ....................... 1002
Section 6E Engine Control System (4JH1) ....................................................... ......... 1034
Section 6F Exhaust System ....................................................... .............................. ... 1333
Section 6H Accelerator Control ....................................................... ..............................135 3
SECTION 6
ENGINE
TA BLE OF CONTENTS
ENGINE 6
4JA1/4JH1 MODELS

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TROUBLESHOOTING 6 – 1




BASIC INSPECTION PROCEDURE....6– 2

1. HARD STARTING ............................6– 3

1-1.Starter Motor Inoperative ..........6– 3

1-2. Starter Motor Operates But
Engine Does Not Turn Over ...........6– 3

1-3. Engine Turns Over But Does
Not Start Engine ..............................6– 4

2. UNSTABLE IDLING .........................6– 5

3. INSUFFICIENT POWER ..................6– 6

4. EXCESSIVE FUEL
CONSUMPTION..................................6– 7

5. EXCESSIVE OIL CONSUMPTION ..6– 8

6. OVERHEATING ...............................6– 9

7. WHITE EXHAUST SMOKE..............6– 9

8. DARK EXHAUST SMOKE ...............6– 10

9. OIL PRESSURE DOES NOT RISE..6– 11

10. ABNORMAL ENGINE NOISE ........6– 12

10-1. Engine Knocking ....................6– 12

10-2. Gas Leakage Noise .................6– 12

10-3. Continuous Noise ...................6– 13

10-4. Slapping Noise ........................6– 13

10-5. Excessive Turbocharger
Noise ................................................6– 14
11. ROTATING PART WEAR OF
TURBOCHARGER.............................. 6– 14

12. OIL LEAKAGE FROM
TURBOCHRGER ................................ 6– 15

13. INSUFFICIENT ACCELERATION
AND/OR LACK OF POWER DUE
TO TURBOCHARGER........................ 6– 15

14. BATTERY CHARGING AND
NOISE PROBLEM .............................. 6– 16

14-1. Battery No Charging ............... 6– 16

14-2. Battery Overcharging ............. 6– 16

14-3. Battery Under Charging ......... 6– 17

14-4. Battery Unstable Charging
Current ............................................. 6– 17

14-5. Charging System Noise ......... 6– 18

15. STARTER MOTOR PROBLEM ..... 6– 19

15-1. Starter Motor Pinion Engages
to Ring Gear But Engine Does
Not Turn Over .................................. 6– 19

15-2. Incorrect Pinion And Ring
Gear Engagement ........................... 6– 19

15-3. Starter Motor Continues To
Run After The Starter Switch Is
Turned Off........................................ 6– 20

15-4. Excessive Commutator
Sparking .......................................... 6– 20


SECTION 6
TROUBLESHOOTING
TABLE OF CONTENTS
PAGE PAGE

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6 – 2 TROUBLESHOOTING
Basic Inspection Procedure
Follow the under inspection procedure, when the problem vehicle comes workshop. Step Inspection point Inspection result YES NO
1 Check the check engine lamp Is the check engine lamp turn ON ? Go to
section
6E “On Board Diagnostic
(OBD) System Check" Go to Step 2
2 The battery fluid level and the
gravity Was the problem found? Re-charge the
battery or
replace the battery Go to Step 3
3 The engine coolant capacity Was the problem found? Replenish the
engine coolant Go to Step 4
4 The engine oil level Was the problem found? Replenish the
engine oil Go to Step 5
5 The air cleaner element Was the problem found? Clean or
replace Go to Step 6
6 The piping fixing condition (oil,
vacuum and fuel piping) Was the problem found? Return normal
condition Go to Step 7
7 The drive belt tension and break Was the problem found? Re-adjust the
tension or replace Go to Step 8
8 Go to section 6E “On Board
Diagnostic (OBD) System
Check” Was the problem found?
Verify repair Go to Step 9
9 Go to mechanical
troubleshooting chart Was the problem found?
Verify repair —


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TROUBLESHOOTING 6 – 3
1. Hard Starting
Inspect the following items before diagnosis.
1. The battery conditions. The terminal connection condition.
The battery charge condition or battery power weakness.
2. The fan belt loosen or broken.
3. The main fuse condition (open or not).
4. Fuel quantity level.
1 –1 Starter motor inoperative
Step Action Value(s) Yes No
1 Check the starter switch. Does the starter switch work? —

Go to Step 2 Repair or
replace the
starter switch
2 Check the starter relay. Does the starter relay work? —

Go to Step 3 Repair or
replace the
starter relay
3 Check the magnetic switch. Does the magnetic switch work? —

Go to Step 4 Repair or
replace the magnetic switch
4 Check the pinion gear condition on the starter motor. Was the condition normal? —

Go to Step 5 Replace the
pinion gear
5 Check the brush wear or brush spring weakness. Was the condition normal? —

Replace the
starter motor assembly Repair or
replace the
brush or brush spring

1-2 Starter motor operates but engine does not turn over
Step Action Value(s) Yes No
1 Check the engine internal seizure. Was the engine seized? —

Repair or
replace seized parts Check other
DTC by Tech 2 and go to
indicated DTC


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6 – 4 TROUBLESHOOTING
1-3 Engine turn over but does not start engine
Incase of the fuel not being delivered to the injection pump
Step Action Value(s) Yes No
1 Check clogged, damaged the fuel piping or the
connector loosen.
Was any problem found? —

Repair replace problem parts. Go to Step 2
2 Was the over flow valve on the fuel filter closed? — Repair replace
the over flow valve Go to Step 3
3 Was the fuel filter element clogged? — Replace the
fuel filter element Go to Step 4
4 Was the fuel line air bled? — Go to Step 5 Bleed the air
5 Are any DTC stored? — Go to indicated
DTC Solved

Incase of the fuel is being delivered to the injection pump
Step Action Value(s) Yes No
1 Was the water contain in the fuel? — Replace the
fuel Go to Step 2
2 Was the fuel line air bled? — Go to Step 5 Bleed the air
3 Was the injection spray condition complete? —
Go to Step 4 Replace the
injection nozzle
4 Was the injection nozzle injection starting pressure OK? (See below)
Go to Step 5 Replace the
injection nozzle
5 Was the injection nozzle sticking? — Replace the
injection nozzle Go to Step 6
6 Are any DTC stored? — Go to indicated
DTC Solved

Injection nozzle opening pressure
1st = 19.5 MPa (199 kg/cm2, 2828 psi)

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TROUBLESHOOTING 6 – 5
2. Unstable Idling
Step Action Value(s) Yes No
1 Was the fuel line air bled completely? — Go to Step 3 Bleed the air
2 Was the fuel line leakage or blockage found? — Repair or
replace relation parts. Go to Step 4
3 Was the water contained in the fuel? — Replace the
fuel Go to Step 5
4 Was the fuel filter element clogged? — Replace the
fuel filter element Go to Step 6
5 Was the injection starting pressure or the injection
spray condition OK? (See below)
Go to Step 7 Replace the
injection nozzle
6 Was the injection nozzle sticking? See Step 6 Replace the
injection nozzle Go to Step 8
7 Check the throttle valve condition.
Was the idling port clogged in the throttle valve? —
Repair or
replace the
throttle valve Go to Step 9
8 Was the valve clearance improper adjusted? 0.4 mm
(0.016 in)
both intake
and exhaust valves Adjust the
valve clearance Go to Step 10
9 Was the compression pressure OK? 3,040 kPa
(31 kg/cm2,
441 psi) at 200rpm
Go to Step 11 Readjust the
valve clearance or replace the cylinder head gasket or
cylinder liner or
piston or piston ring or valve
and valve seat
10 Are any DTC stored? — Go to indicated
DTC Solved

Injection nozzle opening pressure
1st = 19.5 MPa (199 kg/cm2, 2828 psi)

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