Isuzu Trooper (1998-2002 year). Manual - part 636

6E–192

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Starting Difficulty In Case Fuel Doesn’t Come to Injector

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
Engine is cranked, but not started for a long time. Steps
soon.

Was OBD System check performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

1. Perform a bulletin research.
2. If a bulletin that addresses the symptom is found,

correct the condition as instructed in the bulletin.

Was a bulletin found?

—

Verify repair

Go to 

Step 3

3

Was a visual/physical check performed?

—

Go to 

Step 4

Go to 

Visual/

Physical

Check

4

Check fuel shortage. If short, replenish.

Was fuel short?

—

Verify

replenish

Go to 

Step  5

5

1. Check fuel pipeline for leak.
2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 6

6

1. Check fuel pipeline & filter for deformation &

clogging.

2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 7

7

1. Check fuel pump for damage.
2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 8 

8

Check the Injector test by Tech 2.

Does the working noise confirm?

—

Go to 

Step 11

Go to 

Step 9

9

1. Check the injector connector for damage.
2. Check the injector harness for damage.
3. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 10

10

Replace the injector. (Refer to the 

injector group sign

programming)

Is the action complete?

—

Verify repair

—

11

1. Indicate RPCV Data List by Tech 2 to check

operation. Perform RPCV test.

2. If a problem is found, replace RP sensor or RPCV

as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 12

6E–193

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Starting Difficulty In Case Fuel Doesn’t Come to Injector

  (Cont'd)

Step

No

Yes

Value(s)

Action

12

1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no

malfunctions have been found, review/inspect the
following:

D

Visual/physical inspection

D

Tech 2 data

D

Freeze Frame data/Failure Records butter

D

All electrical connections within a suspected
circuit and/or system

3. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Contact

Technical

Assistance

6E–194

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Lubrication System Trouble

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
In road tests oil pressure doesn’t rise, or oil is foul to
excess.

Was OBD System check performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

1. Perform a bulletin research.
2. If a bulletin that addresses the symptom is found,

correct the condition as instructed in the bulletin.

Was a bulletin found?

—

Verify repair

Go to 

Step 3

3

1. Check if a correct engine oil is used.
2. If a problem is found, change engine oil.

Was a problem found?

—

Verify repair

Go to 

Step 4

4

1. Check the oil pressure meter for damage.
2. Check the oil unit harness and connector for

damage.

3. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 5

5

1. Check oil pipe connections for leakage.
2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 6

6

1. Check oil filter for clogging.
2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 7

7

1. Check valve clearance.
2. If a problem is found, adjust as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 8

8

1. Check camshaft bearing for wear.
2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 9

9

1. Check crankshaft & connecting rod bearings for

wear.

2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 10

10

1. Check oil pump for damage.
2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 11

6E–195

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Lubrication System Trouble

  (Cont'd)

Step

No

Yes

Value(s)

Action

11

1. Check cylinder head & cam carrier gaskets for

damage.

2. If a problem is found, repair or replace as

necessary.

Was a problem found?

—

Verify repair

Go to 

Step 12

12

1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no

malfunctions have been found, review/inspect the
following:

D

Visual/physical inspection

D

Tech 2 data

D

Freeze Frame data/Failure Records butter

D

All electrical connections within a suspected
circuit and/or system

3. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Contact

Technical

Assistance