Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 1254
6E1–92
RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Engine Cranks But Will Not Run
(Cont'd)
Step
No
Yes
Value(s)
Action
20
Replace the coil–to–spark plug secondary ignition wire
and any other secondary wires which exceed the
specified value.
Is there still a problem?
10,000
W
per
foot
Go to Step 21
Verify repair
21
1. Remove the spark plugs from all cylinders.
2. Visually inspect the spark plug electrodes.
3. Replace any spark plugs with loose or missing
electrodes or cracked insulators.
Did your inspection reveal any spark plugs exhibiting
excessing fouling?
—
Correct the
fouling
condition
Go to Step 33
22
Verfiy repair.
Attempt to start the engine.
Is there still a problem?
—
Go to Step 23
Go to Step 22
23
1. Ignition OFF, install a fuel pressure gauge at the test
fitting on the fuel supply line in the engine
compartment.
CAUTION: Use a shop cloth to absorb any fuel
leakage while making the connection.
2. Check the engine and observe the fuel pressure.
Is the fuel pressure within the specified values, and
does it hold steady for 2 seconds?
285–375 kPa
(43–55 psi)
Go to Step 25
Go to Step 24
24
Is any fuel pressure indicated?
—
Go to Fuel
System
Electrical Test
Go to Fuel
System
Diagnosis
25
1. Install switch box J 39021–2 and J 39021–90 at the
injector test connector.
2. Activate an injector.
Did the fuel pressure drop when the injector was
activated?
—
Go to Step 26
Go to Fuel
System
Diagnosis
26
Pressurize the fuel system using the ignition ON and
use the injector switch box to test pressure drop for
each injector.
Was there a pressure drop when each injector was
activated?
—
Go to Step 27
Go to Fuel
System
Diagnosis
27
1. Remove the switch box and install an injector test
light J 39021–45 at the injector test harness
connector.
2. Crank the engine.
Are any of the lights blinking when the engine is
cranked?
—
Go to Step 33
Go to Step 28
28
1. Raise the vehicle and disconnect the CKP sensor
harness.
2. Ignition ON.
3. With a test light to ground, probe the CKP ignition
feed harness terminal.
Did the light illuminate?
—
Go to Step 29
Go to Step 30
6E1–93
RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Engine Cranks But Will Not Run
(Cont'd)
Step
No
Yes
Value(s)
Action
29
1. Ignition ON.
2. At the CKP harness connector, connect a test lamp
between the ignition and ground terminals.
Did the lamp illuminate?
—
Go to Step 31
Go to Step 32
30
Check the CKP High circuit between the sensor and the
PCM for a short to ground or open circuit.
Was a problem found?
—
Verify repair
Go to Step 33
31
Replace the CKP position sensor.
Is there still a problem?
—
Go to Step 34
—
32
Check the CKP Low circuit between the sensor and the
PCM for: an open circuit, a short to ground, or short to
voltage.
Was the problem found?
—
Verify repair
Go to Step 33
33
Replace the PCM.
IMPORTANT: The replacement PCM must be
programmed. Refer to On–Vehicle Service in
Powertrain Control Module and Sensors for
procedures.
and also refer to latest service bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
—
Verify repair
—
34
1. Test the fuel for contamination.
2. If a problem is found, clean the fuel system and
correct the contaminated fuel condition as
necessary. Replace the fuel filter and replace any
injectors that are not delivering fuel (see Injector
Balance Test).
Was a problem found?
—
Verify repair
Go to Step 35
35
To diagnose the following conditions, refer to Engine
Mechanical:
D
Slipped camshaft drive belt.
D
Leaking or sticky valves or rings.
D
Excessive valve deposits.
D
Loose or worn rocker arms.
D
Weak valve springs
D
Leaking head gasket.
Is the action complete?
—
Verify repair
—
6E1–94
RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
FUEL SYSTEM ELECTRICAL TEST
060R100024
Circuit Description
When the ignition switch is first turned ON, the powertrain
control module (PCM) energizes the fuel pump relay
which applies power to the in–tank fuel pump. The fuel
pump relay will remain ON as long as the engine is
running or cranking and the PCM is receiving 58X
crankshaft position pulses. If no 58X crankshaft position
pulses are present, the PCM de–energizes the fuel pump
relay within 2 seconds after the ignition is turned ON or the
engine is stopped.
The fuel pump delivers fuel to the fuel rail and injectors,
then to the fuel pressure regulator. The fuel pressure
regulator controls fuel pressure by allowing excess fuel to
be returned to the fuel tank. With the engine stopped and
ignition ON, the fuel pump can be turned ON by using a
command by the Tech 2.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed–through wire insulation, or a wire broken inside
the insulation. Check for the following items:
D
Poor connection or damaged harness – Inspect the
PCM harness and connectors for improper mating,
broken locks, improperly formed or damaged
terminals, poor terminal–to–wire connection, and
damaged harness.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart:
2. If the fuel pump is operating but incorrect pressure
is noted, the fuel pump wiring is OK and the ”Fuel
System Pressure Test” chart should be used for
diagnosis.
6E1–95
RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
CAUTION: To reduce the risk of fire and personal
injury:
D
It is necessary to relieve fuel system pressure
before connecting a fuel pressure gauge. Refer to
Fuel Pressure Relief Procedure, below.
D
A small amount of fuel may be released when
disconnecting the fuel lines. Cover fuel line
fittings with a shop towel before disconnecting, to
catch any fuel that may leak out. Place the towel in
an approved container when the procedure is
completed.
Fuel Pressure Relief Procedure
1. Remove the fuel cap.
2. Remove the fuel pump relay from the underhood
relay center.
3. Start the engine and allow it to stall.
4. Crank the engine for an additional 3 seconds.
Fuel Gauge Installation
1. Remove the shoulder fitting cap.
2. Install fuel gauge J 34730–1 to the fuel feed line
located in front of and above the right side valve
cover.
3. Reinstall the fuel pump relay.
Fuel System Electrical 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. Read the ”Caution” above.
2. Relieve the fuel system pressure and install the fuel
pump pressure gauge to the test fitting.
3. Use a Tech 2 to command the fuel pump ON.
Is there an immediate pressure build–up which
indicates the pump is running?
—
Go to Step 3
Go to Step 4
3
1. Verify that the pump is not running by removing the
fuel filler cap and listening.
2. Command the pump ON with the Tech 2.
Did the pump turn OFF after 2 seconds?
—
Test
completed
Go to Step 12
4
1. Ignition OFF.
2. Remove the fuel pump relay.
3. Ignition SW “On”, Engin “Off”.
4. Using a test light connected to ground, probe the
battery feed to the relay.
Did the light illuminate?
—
Go to Step 6
Go to Step 5
5
Repair short or open battery feed to fuel pump relay.
Is the action complete?
—
Verify repair
—
6
1. Connect a test light between the two wires that
connect to the fuel pump relay pull–in coil.
2. Ignition ON.
Did the test light illuminate for 2 seconds and then turn
off?
—
Go to Step 12
Go to Step 7
7
1. With a test light connected to battery (–), probe the
fuel pump relay connector at the wire which runs
from the relay pull–in coil to the PCM.
2. Ignition ON.
Did the test light illuminate for 2 seconds and then turn
off?
—
Go to Step 8
Go to Step 9
8
Locate and repair open in the fuel pump relay ground
circuit.
Is the action complete?
—
Verify repair
—
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст