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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