Isuzu KB P190. Manual — part 196

SECTION 6

ENGINE

TABLE OF CONTENTS

ENGINE 6

TO MODEL INDEX

BACK TO MAIN INDEX

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 . . . . . . . . . . . . . . . . . . . . . . . ... 965

Section 6D Engine Electrical . . . . . . . . . . . . . . . . . . . . . ... 1002

Section 6E Engine Control System (4JH1) . . . . . . . . . . . . . . . . 1034

Section 6F Exhaust System . . . . . . . . . . . . . . . . . . . . . . 1333

Section 6H Accelerator Control . . . . . . . . . . . . . . . . . . . . . .1353

SECTION 6

ENGINE

TABLE OF CONTENTS

ENGINE 6

4JA1/4JH1 MODELS

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

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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