Mazda Protege 5. Manual — part 101
SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (ZM)]
01–03A–57
01–03A
Intake Manifold Vacuum Inspection
1. Verify air intake hoses are installed properly.
2. Start the engine and run it at idle.
3. Measure the intake manifold vacuum using a vacuum gauge.
•
If not as specified, inspect the following:
— Air suction at throttle body, intake manifold and PCV valve installation points
— Fuel injector insulator
— Accelerator cable free play
— Engine compression (See 01–10A–8
COMPRESSION INSPECTION [ZM].)
Specification
More than 60 kPa {450 mmHg, 18 inHg}
Note
•
Air suction can be located by engine speed
change when lubricant is sprayed on the
area where suction is occurring.
Idle Air Control (IAC) Inspection
Engine coolant temperature compensation inspection
1. Connect the WDS or equivalent to DLC-2.
2. Select the following PIDs.
•
ECT
•
RPM
3. Verify that the engine is in cold condition, then start the engine.
4. Verify that the engine speed decreases as the engine warms up.
•
If the engine speed does not decrease or decreases slowly, carry out the following:
— ECT sensor inspection
— IAC valve inspection
Load compensation inspection
1. Warm up the engine to normal operating temperature and run it at idle.
2. Connect the WDS or equivalent to DLC-2.
3. Select the following PID.
•
RPM
4. Turn the electrical loads on and verify that the engine speed is within the specification.
•
If not as specified, carry out the following:
— A/C switch inspection
— P/S pressure switch inspection
— IAC valve inspection
Engine speed (rpm)
*
: Neutral or P position
Note
•
Excludes temporary idle speed drop just after the loads are turned on.
X3U101WCW
Load condition
Idle-up speed (rpm)*
No load
650—750 (700
±
50)
Headlight switch is on.
P/S on
700—800 (750
±
50)
A/C on
1712-1U-01G(01-03A).fm 57 ページ 2001年6月29日 金曜日 午後4時45分
SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (ZM)]
01–03A–58
Variable Tumble Control System (VTCS) Inspection
1. Connect the WDS or equivalent to the DLC-2.
2. Access ECT PID.
3. Verify ECT PID is 65
°°°°
C {149
°°°°
F} or less.
4. Start the engine.
5. Verify that the rod of tumble swirl control actuator is pulled.
•
If the rod is not pulled, inspect the following.
— VTCS shutter valve actuator
— VTCS delay valve
— VTCS chamber
— Vacuum hose
— Tumble swirl control solenoid valve
— Wiring harness and connectors (Main relay — VTCS solenoid valve — PCM terminal 19)
6. Access RPM PID.
7. Inspect the rod operation under the following
condition.
•
If the rod operation is not as specified, inspect
the following:
— Tumble swirl control actuator
— Vacuum delay valve
— Vacuum chamber
— Vacuum hose
— VTCS solenoid valve
— Wiring harness and connectors (Main
relay — VTCS solenoid valve — PCM
terminal 19)
Rod operation
Engine speed (RPM PID)
(rpm)
Tumble swirl control
actuator
3,000 or less
Operate
3,000 or more
Not operate
X3U101WEB
1712-1U-01G(01-03A).fm 58 ページ 2001年6月29日 金曜日 午後4時45分
SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (ZM)]
01–03A–59
01–03A
Pressure Regulator Control Inspection
Warning
••••
Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death.
Fuel can also irritate skin and eyes.
••••
To prevent this, always complete the “BEFORE REPAIR PROCEDURE”. (See 01–14–4 BEFORE
REPAIR PROCEDURE.)
1. Disconnect the negative battery cable.
2. Connect a fuel pressure gauge between the fuel
filter and fuel distributor.
3. Connect the negative battery cable.
4. Measure the fuel line pressure under the following
conditions.
Specification
Inspection 1
1. Inspect the following.
•
ECT, IAT, TP PIDs.
•
Pressure regulator.
•
PRC solenoid valve.
Inspection 2
1. Inspect the following.
•
Loose or damage vacuum hose. (Pressure regulator—PRC solenoid valve—intake manifold)
•
PRC solenoid valve.
Condition
Fuel pressure (kPa {kgf/cm
2
, psi})
Idling
210—250
{2.1—2.6,
30—36}
210—250
{2.1—2.6,
30—36}
270—310
{2.7—3.2,
39—45}
During 100
sec. of hot
start
270—310
{2.7—3.2,
39—45}
After 100 sec.
of hot start
210—250
{2.1—2.6,
30—36}
Judgment
Normal
Not Normal
(Perform
Inspection 1)
Not Normal
(Perform
Inspection 2)
X3U101WD7
1712-1U-01G(01-03A).fm 59 ページ 2001年6月29日 金曜日 午後4時45分
SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (ZM)]
01–03A–60
Fuel Injector Operation Inspection
Spark Test
1. Disconnect the fuel pump relay connector.
2. Verify that each high-tension lead and connector is connected property.
3. Inspect the ignition system in the following procedure.
Warning
••••
High voltage in the ignition system can cause strong electrical shock which can result in serious
injury. Avoid direct contact to the vehicle body during the following spark test.
End Of Sie
STEP
INSPECTION
ACTION
1
•
While cranking engine, inspect for fuel
injector operation sound at each cylinder
using a soundscope.
•
Is operation sound heard?
Yes
Fuel injector operation is okay.
No
All cylinders no heard:
Go to next step.
Some cylinders no heard:
Go to Step 3.
2
•
Carry out main relay operation inspection.
•
Is main relay operation normal?
Yes
Inspect following:
Fuel injector power system related wiring harness and
connectors
PCM connectors
Fuel injector GND and related wiring harness and
connectors
No
Repair or replace malfunctioning parts.
3
•
Change fuel injector connector of not
operating fuel injector and operating fuel
injector.
•
Is operation sound heard?
Yes
Go to next step.
No
Replace fuel injector.
4
•
Are wiring harness and connectors of not
operating fuel injector okay? (Open or short)
Yes
Inspect PCM terminal voltage of fuel injector signal.
No
Repair or replace malfunctioning parts.
STEP
INSPECTION
ACTION
1
•
Remove high-tension lead from spark plug.
•
Hold high-tension lead with installed pliers
5—10 mm {0.20—0.39 in} from GND.
•
Crank engine and verify there is a strong
blue spark. (Inspect each cylinder.)
Yes
Ignition system is okay.
No
Some cylinders do not spark:
Go to next step.
All cylinders do not spark:
Go to Step 3.
2
•
Is high-tension lead resistance correct?
Yes
Inspect for cracks or damage of high-tension lead and
ignition coil.
No
Replace high-tension lead.
3
•
Does PCM or ignition coil connector have
poor connection?
Yes
Repair or replace connector.
No
Go to next step.
4
•
Is ignition coil winding resistance okay?
Yes
Go to next step.
No
Replace ignition coil.
5
•
Are following parts okay?
— CKP sensor and crankshaft pulley (also,
inspect gap)
Specification
0.5—1.5 mm {0.020—0.059 in}
— PCM terminal 21/22 voltage
Specification
Approx. 1.5 V
Yes
Inspect for open or short in wiring harness and connector of
CKP sensor.
No
Repair or replace malfunctioning parts.
1712-1U-01G(01-03A).fm 60 ページ 2001年6月29日 金曜日 午後4時45分
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст