Isuzu Trooper (1998-2002 year). Service manual — part 637
6E–196
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
QOS System Doesn’t Work
Step
Action
Value(s)
Yes
No
1
Was OBD System check performed?
—
Go to
Step 2
Go to
OBD
System
Check
2
Check glawplug indicator light. If bulb is broken,
replace.
Was a problem found?
—
Verify repair
Go to
Step 3
3
1. Connect a circuit tester between glawplug & engine
ground.
2. With ignition on and engine off, check if the glaw
indicator and circuit tester indicate power voltage
for 9 to 13 sec. If not indicated, repair terminal & wire
harness.
Was repair needed?
—
Verify repair
Go to
Step 4
4
1. Connect a circuit tester between glawplug and
engine ground.
2. With engine on, check if voltage continues for 180
sec. If not, inspect and repair glaw relay.
Was repair needed?
—
Verify repair
Go to
Step 5
5
1. Remove the glawplug, and if damaged, replace.
2. Check glawplug resistance.
Was resistance as specified?
0.8 – 1
W
Go to
Step 7
Go to
Step 6
6
Replace glawplug.
Was measure completed?
—
Verify repair
Go to
Step 7
7
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–197
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Much Black Smoke in Exhaust Gas
Step
Action
Value(s)
Yes
No
1
DEFINITION:
In road tests, much black smoke is mixed.
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 fuel is used.
2. If a problem is found, change fuel.
Was a problem found?
—
Verify repair
Go to
Step 4
4
1. Check air cleaner element for clogging.
2. If a problem is found, repair or replace as
necessary.
Was a problem found?
—
Verify repair
Go to
Step 5
5
1. Connect Tech 2 to the vehicle.
2. Monitor data list to check injector function.
3. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to
Step 6
6
1. Connect Tech 2 to the vehicle.
2. Monitor RPCV test to check rpcv function.
3. 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. Review all diagnostic procedures in this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
D
Visual/physical check
D
Tech 2 data list
D
Freeze Frame data
D
All electrical connections in suspected circuits
& systems
3. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Contact
Technical
Assistance
6E–198
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Excess Engine Oil Consumption
Step
Action
Value(s)
Yes
No
1
DEFINITION:
Oil consumption measured in road tests is higher than
expected.
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 oil pipe connections for leakage.
2. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to
Step 5
5
1. Check oil seals and gaskets for leakage.
2. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to
Step 6
6
1. Connect Tech 2 to the vehicle.
2. Perform RPCV test to check its function.
3. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to
Step 7
7
1. Check piston ring for damage & groove wear.
2. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to
Step 8
8
1. Check valve stem, valve guide and oil controller for
wear.
2. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to
Step 9
9
1. Check camshaft carrier & cylinder head gaskets for
blow-by.
2. If a problem is found, repair or replace as
necessary.
Was a problem found?
—
Verify repair
Go to
Step 10
10
1. Review all the diagnostic procedures in this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
D
Visual/physical check
D
Tech 2 data list
D
Freeze Frame data
D
All electrical connections in suspected circuits
& systems
3. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Contact
Technical
Assistance
6E–199
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Default Matrix Table
Service Procedure Default Strategy
A referral strategy has been established to assist the
technician with additional information when the cause of
the failure cannot be determined. If no problem is found
after performing diagnostics, then refer to the default
matrix table for further diagnostic information.
Default Matrix Table
Strategy Based Diagnostic Charts
Initial Diagnosis
Default Section(s)
On-Board Diagnostic (OBD) System
Check
Vehicle does not enter diagnostics.
Chassis Electrical
On-Board Diagnostic (OBD) System
Check
Vehicle enters diagnostics and
communicates with the Tech 2. MIL is
“ON” in diagnostics. Engine does not
start and run.
HEUI System Check
On-Board Diagnostic (OBD) System
Check
Engine starts and runs, no ECM codes
set. Customer complains of vibration.
—
On-Board Diagnostic (OBD) System
Check
Engine starts and runs, no ECM codes
set. Customer complains of harsh or
soft shift, poor performance, delayed or
no engagement into drive or reverse,
transmission fluid leak, transmission
noise or vibration, or improper TCC
operation.
Automatic Transmission
ECM Power and Ground Check
On-Board Diagnostic (OBD) System
Check.
Chassis Electrical
ECM Power and Ground Check
On-Board Diagnostic (OBD) System
Check. ECM power and ground circuits
OK. Data link voltage incorrect.
Chassis Electrical
On-Board Diagnostic (OBD) System
Check
Engine starts and runs, no ECM codes
set. Customer complains of harsh or
soft shift, poor performance, delayed or
no engagement into drive or reverse,
transmission fluid leak, transmission
noise or vibration, or improper TCC
operation.
Automatic Transmission
Symptoms
Initial Diagnosis
Default Section(s)
Intermittents
1. On-board diagnostic (OBD)
system check.
2. Careful visual/physical inspections.
Chassis Electrical
Hard Starts
1. OBD system check.
2. Sensors (ECT, MAP, EGR, AP) ;
output chart.
3. Fuel system electrical test, fuel
system diagnosis.
4. Injector system.
Engine Mechanical, Injector
System Check, Exhaust System
Diagnosis
Surges and/or Chuggles
1. OBD system check.
2. Fuel system diagnosis.
3. Injector system.
Calibration ID “Broadcast”
/Service Bulletins, Ignition
System Check, Generator
Output, Exhaust System
Diagnosis
Lack of Power, Sluggish or Spongy
1. OBD system check.
2. Fuel system diagnosis.
3. Injector system.
Refer to
Exhaust System in
Engine Exhaust, TCC
Operation, Calibration
ID/Service Bulletins
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст