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
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