Isuzu Rodeo UE. Service manual — part 248
6E1–363
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Step
No
Yes
Value(s)
Action
10
Check for an engine mechanical problem. Perform a
cylinder compression check. Refer to Engine
Mechanical.
Was a problem found?
—
Verify repair
Go to Step 11
11
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:
f
Visual/physical inspection
f
Tech 2 data
f
Freeze Frame data/Failure Records buffer
f
All electrical connections within a suspected
circuit and/or system
Was a problem found?
—
Verify repair
Contact
Technical
Assistance
6E1–364
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
ROUGH, UNSTABLE, OR INCORRECT
IDLE, STALLING SYMPTOM
DEFINITION:
Engine runs unevenly at idle. If severe, the engine or
vehicle may shake. Engine idle speed may vary in RPM.
Either condition may be severe enough to stall the engine.
Step
Action
Value(s)
Yes
No
1
Was the On–Board Diagnostic (OBD) System Check
performed?
—
Go to Step 2
Go to OBD
System
Check
2
1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
—
Verify repair
Go to Step 3
3
Was a visual/physical check performed, including the
rotor, ignition coil and secondary ignition wires?
—
Go to Step 4
Go to Visual /
Physical
Check
4
Verify that the EGR valve is not mounted backwards.
Was a problem found?
—
Verify repair
Go to Step 5
5
1. Check for incorrect idle speed. Ensure that the
following conditions are present:
f
Engine fully warm.
f
Accessories are OFF.
2. Using a Tech 2, monitor IAC position.
Is the IAC position within the specified values?
Between 10
and 50
counts
Go to Step 8
Go to Step 7
6
1. Visually/physically inspect for the following
conditions:
f
Restricted air intake system. Check for a
restricted air filter element, or foreign objects
blocking the air intake system.
f
Check for objects blocking the IAC passage or
throttle bore, excessive deposits in the IAC
passage and on the IAC pintle, and excessive
deposits in the throttle bore and on the throttle
plate.
f
Check for a condition that causes a large
vacuum leak, such as an incorrectly installed
or faulty crankcase ventilation valve brake
booster hose.
Was a problem found?
—
Verify repair
Go to Step 7
7
Using a Tech 2, monitor TP angle with the engine idling.
Is the TP angle at the specified value and steady?
0%
Go to Step 8
For further
diagnosis,
refer to DTC
P0123
8
Check for proper ignition voltage output with the spark
tester J 26792.
Was a problem found?
—
Verify repair
Go to Step 9
9
1. Remove the spark plugs and check for gas or oil
fouling, cracks, wear, improper gap, burned
electrodes, heavy deposits or improper heat range.
2. If spark plugs are fouled, the cause of the fouling
must be determined before replacing the spark
plugs.
Was a problem found?
—
Verify repair
Go to Step 10
6E1–365
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Step
No
Yes
Value(s)
Action
10
Check for a loose ignition control module ground. Refer
to Electrical Ignition System.
Was a problem found?
—
Verify repair
Go to Step 11
11
Monitor ”Long Term Fuel Trim” on the Tech 2.
Is ”Long Term Fuel Trim” in the negative range (rich
condition)?
—
Go to Step 12
Go to Step 13
12
Check the items that can cause the engine to run rich.
Refer to Diagnostic Aids in DTC P0172.
Was a problem found?
—
Verify repair
Go to Step 13
13
Is ”Long Term Fuel Trim” significantly in the positive
range (lean condition)?
—
—
Go to Step 14
Go to Step 15
14
Check items that can cause the engine to run leading.
Refer to ”Diagnostic Aids” in DTC P0171.
Was a problem found?
—
Verify repair
Go to Step 14
15
Check the injector connections. If any of the injectors
are connected to an incorrect cylinder, correct as
necessary.
Was a problem found?
—
Verify repair
Go to Step 16
16
Perform the Injector Coil/Balance Test.
Was a problem found?
—
Verify repair
Go to Step 17
17
1. Check the following engine mechanical problems:
f
Low compression
f
Leaking cylinder head gasket
f
Worn or incorrect camshaft
f
Sticking or leaking valves
f
Valve timing
f
Broken valve springs
f
Camshaft drive belt slipped or stripped.
Was a problem found?
—
Verify repair
Go to Step 18
18
1. Check for faulty motor mounts. Refer to Engine
Mechanical for inspection of mounts.
2. If a problem is found, repair as necessary.
Was a problem found?
—
Verify repair
Go to Step 19
19
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:
f
Visual/physical inspection
f
Tech 2 data
f
Freeze Frame data/Failure Records buffer
f
All electrical connections within a suspected
circuit and/or system
Was a problem found?
—
Verify repair
Contact
Technical
Assistance
6E1–366
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
POOR FUEL ECONOMY SYMPTOM
DEFINITION:
Fuel economy, as measured by an actual road test, is
noticeably lower than expected. Also, economy is
noticeably lower than it was on this vehicle at one time,
as previously shown by an actual road test.
Step
Action
Value(s)
Yes
No
1
Was the On–Board Diagnostic (OBD) System Check
performed?
—
Go to Step 2
Go to OBD
System
Check
2
1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
—
Verify repair
Go to Step 3
3
Was a visual/physical check performed?
—
Go to Step 4
Go to Visual /
Physical
Check
4
Check owner’s driving habits.
f
Is the A/C ON full time (defroster mode ON)?
f
Are tires at the correct pressure?
f
Are excessively heavy loads being carried?
f
Is acceleration too much, too often?
—
Go to Step 5
Go to Step 6
5
Review the items in Step 4 with the customer and
advise as necessary.
Is the action complete?
—
System OK
—
6
1. Visually/physically check: Vacuum hoses for splits,
kinks, and improper connections and routing as
shown on the ”Vehicle Emission Control
Information” label.
Was a problem found?
—
Verify repair
Go to Step 7
7
Remove and check the air filter element for dirt or for
restrictions.
Was a problem found?
—
Verify repair
Go to Step 8
8
1. Remove the spark plugs and check for gas or oil
fouling, cracks, wear, improper gap, burned
electrodes of heavy deposits.
2. Is spark plugs are fouled, the cause of fouling must
be determined before replacing the spark plugs.
Was a problem found?
—
Verify repair
Go to Step 9
9
Check for low engine coolant level.
Was a problem found?
—
Verify repair
Go to Step 10
10
Check for an incorrect or faulty engine thermostat.
Refer to Engine Cooling.
Was a problem found?
—
Verify repair
Go to Step 11
11
Check for low engine compression. Refer to Engine
Mechanical.
Was a problem found?
—
Verify repair
Go to Step 12
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст