Mazda Protege 5. Manual — part 63
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–72
Diagnostic procedure
POSSIBLE
CAUSE
•
CKP sensor malfunction
•
CMP sensor malfunction
•
Ignition coil malfunction
•
High-tension lead malfunction
•
MAF sensor contamination
•
Excess air suction in intake-air system (between MAF sensor and dynamic chamber)
•
Fuel pump malfunction
•
Fuel pressure regulator malfunction
•
Fuel line clogged
•
Fuel filter clogged
•
Fuel leakage in fuel line
•
Purge control solenoid valve malfunction
•
PCV valve malfunction
•
EGR valve malfunction
•
Vacuum hoses damages or improper connection
•
Related connector and terminal malfunction
•
Related wiring harness malfunction
•
Poor fuel quality
DTC P0300
Random misfire detection
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
•
Has FREEZE FRAME DATA been recorded?
Yes Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to
next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•
Check for related Service Bulletins availability.
•
Is any related repair information available?
Yes Perform repair or diagnosis according to available repair
information.
•
If vehicle is not repaired, go to next step.
No
Go to next step.
3
VERIFY RELATED PENDING CODE OR
STORED DTCs
•
Turn ignition key to OFF then start engine.
•
Verify related pending code or stored DTCs.
•
Are other DTCs present?
Yes Go to appropriate DTC troubleshooting.
(See 01–02B–15 DTC TABLE [FS].)
No
Go to next step.
4
VERIFY CURRENT INPUT SIGNAL STATUS
(IGNITION KEY TO ON/IDLE)
•
Access ECT, IAT, MAF, RPM, TP, and VS
PIDs using WDS or equivalent.
(See 01–40B–7 PCM Inspection Using the
SST (WDS or equivalent).)
•
Is there any signal that is far out of
specification when ignition switch is ON and
engine runs at idle?
Yes Inspect suspected circuit and/or part according to
inspection results.
(See 01–40B–7 PCM Inspection Using the SST (WDS or
equivalent).)
Then go to Step 23.
No
Go to next step.
5
VERIFY CURRENT INPUT SIGNAL STATUS
UNDER TROUBLE CONDITION
•
Inspect same PIDs as in Step 4 while
simulating FREEZE FRAME DATA condition.
•
Is there any signal which causes drastic
changes?
Yes Inspect suspected circuit and/or part according to
inspection results.
(See 01–40B–7 PCM Inspection Using the SST (WDS or
equivalent).)
Then go to Step 23.
No
Go to next step.
6
INSPECT CMP SENSOR
•
Inspect CMP sensor.
(See 01–40B–35 CAMSHAFT POSITION
(CMP) SENSOR INSPECTION [FS].)
•
Is CMP sensor okay?
Yes Go to next step.
No
Inspect installation condition and damages on timing belt
and gears, repair faulty parts.
•
If it is okay, replace CMP sensor.
Then go to Step 23.
7
VERIFY CKP SENSOR INSTALLATION
CONDITION
•
Check CKP sensor for looseness.
•
Is CKP sensor loose?
Yes Retighten CKP sensor, then go to Step 23.
No
Go to next step.
8
CHECK IGNITION COIL OPERATION AND
HIGH-TENSION LEAD WITH TIMING LIGHT
•
Verify blinking condition on each cylinders
using timing light at idle.
•
Do all cylinders show blinking condition?
Yes Go to Step 12.
No
Go to next step.
1712-1U-01G(01-02B).fm 72 ページ 2001年6月29日 金曜日 午後3時24分
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–73
01–02B
9
CHECK HIGH-TENSION LEADS OF NON-
BLINKING CYLINDER
•
Turn ignition key to OFF.
•
Inspect high-tension leads for installation
condition, corrosion on terminal, open lead and
damaged cover.
•
Is condition of high-tension lead okay?
Yes Go to next step.
No
Replace faulty high-tension lead, then go to Step 23.
10
INSPECT POWER SUPPLY TERMINAL AT
IGNITION COIL CONNECTOR
•
Disconnect ignition coil connector.
•
Turn ignition key to ON (Engine OFF).
•
Measure voltage between ignition coil terminal
A (harness-side) and body ground.
•
Is voltage reading B+?
Yes Go to next step.
No
Check for open circuit between ignition coil connector and
ignition switch. Repair or replace wiring harness, then go to
Step 23.
11
INSPECT IGNITION COIL RESISTANCE
•
Check ignition coil resistance.
(See 01–18–2 IGNITION COIL INSPECTION.)
•
Is coil resistance okay?
Yes Go to Step 23.
No
Replace ignition coil, then go to Step 23.
12
INSPECT MAF SIGNAL
•
Start engine.
•
Access MAF PID using WDS or equivalent.
•
Verify that MAF PID changes quickly according
to race engine RPM.
•
Is MAF PID response okay?
Yes Go to next step.
No
Replace MAF sensor, then go to Step 23.
13
INSPECT EXCESSIVE AIR SUCTION IN
INTAKE-AIR SYSTEM
•
Inspect for air leakage at following:
— Between MAF sensor and throttle body
— Between throttle body and dynamic
chamber
•
Is there malfunction?
Yes Repair or replace suspected part, then go to Step 23.
No
Go to next step.
14
INSPECT FUEL LINE PRESSURE
•
Inspect fuel line pressure.
(See 01–14–6 FUEL PRESSURE
INSPECTION.)
•
Is fuel line pressure okay?
Yes Go to Step 18.
No
If fuel line pressure is too high, go to next step.
If fuel line pressure is too low, go to Step 16.
15
VERIFY VACUUM LEADING TO PRESSURE
REGULATOR
•
Disconnect vacuum hose from pressure
regulator.
•
Start engine.
•
Is vacuum felt at opening end of vacuum hose?
Yes Check following:
•
Fuel pump maximum pressure
(See 01–14–15 FUEL PUMP UNIT INSPECTION.)
•
Fuel return hose for clogging
— If all above are okay, replace pressure regulator.
Then go to Step 23.
No
Verify vacuum hoses are connected correctly.
•
If okay, replace pressure regulator control solenoid
valve.
•
If not, reconnect vacuum hose in proper position.
Then go to Step 23.
16
INSPECT FUEL PUMP MAXIMUM PRESSURE
•
Inspect fuel pump maximum pressure.
(See 01–14–15 FUEL PUMP UNIT
INSPECTION.)
•
Is fuel pump maximum pressure within 450—
630 kPa {4.5—6.5 kgf/cm
2
, 64—92 psi}?
Yes Go to next step.
No
Inspect fuel pump circuit for open or poor connection.
Repair or replace suspected circuit, then go to Step 23.
•
If okay, replace fuel pump, then go to Step 23.
17
INSPECT FUEL LINE FROM FUEL PUMP TO
FUEL DELIVERY PIPE
•
Visually inspect for fuel leakage in fuel line for
any leakage.
•
Is any fuel leakage found?
Yes Replace suspected fuel line, then go to Step 23.
No
Inspect fuel filters for following:
•
Restriction or clogging at fuel filter (high-pressure).
•
Foreign material or stain inside fuel filter (low-pressure)
Perform following actions as result.
•
If restriction or clogging is found at fuel filter (high-
pressure), replace fuel filter (high-pressure).
•
If foreign material or stain is found inside fuel filter (low-
pressure), clean fuel tank and fuel filter (low-pressure).
•
If all items above are okay, replace pressure regulator.
Then, go to Step 23.
STEP
INSPECTION
ACTION
1712-1U-01G(01-02B).fm 73 ページ 2001年6月29日 金曜日 午後3時24分
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–74
End Of Sie
18
INSPECT ENGINE COMPRESSION
•
Inspect engine compression.
(See 01–10B–8 COMPRESSION
INSPECTION [FS].)
•
Is it okay?
Yes Go to next step.
No
Implement engine overhaul for repairs, then go to Step 23.
19
INSPECT OPERATION OF PURGE CONTROL
SOLENOID VALVE
•
Inspect purge solenoid valve.
(See 01–16–12 PURGE SOLENOID VALVE
INSPECTION.)
•
Is purge control solenoid valve operation okay?
Yes Go to next step.
No
Replace purge control solenoid valve, then go to Step 23.
20
INSPECT PCV VALVE OPERATION
•
Turn ignition key to OFF.
•
Remove PCV valve and check valve operation.
(See 01–16–18 POSITIVE CRANKCASE
VENTILATION (PCV) VALVE INSPECTION.)
•
Is PCV valve operation okay?
Yes Replace PCV valve, then go to Step 23.
No
Go to next step.
21
INSPECT OPERATION OF EGR VALVE
•
Remove EGR valve.
•
Visually check for stuck open condition.
•
Is EGR valve stuck open?
Yes Repair or replace EGR valve, then go to Step 23.
No
Go to next step.
22
INSPECT SEALING OF ENGINE COOLANT
PASSAGE
Warning
••••
Removing radiator cap when radiator is
hot is dangerous. Scalding coolant and
steam may shoot out and cause serious
injury.
••••
When removing radiator cap, wrap thick
cloth around and turn it slowly.
•
Remove radiator cap.
•
Implement procedure to bleed air from engine
coolant, then run engine at idle.
•
Is there any small bubble which makes engine
coolant white at filling opening?
Note
•
Large bubbles are normal since they are
remaining air coming out from engine
coolant passage.
Yes Air gets in from poor sealing on head gasket or other areas
between combustion chamber and engine coolant
passage. Repair or replace faulty parts, then go to next
step.
No
Go to next step.
23
VERIFY TROUBLESHOOTING OF MISFIRE DTC
COMPLETED
•
Make sure to reconnect all disconnected
connectors.
•
Turn ignition key to ON (Engine OFF).
•
Clear DTC from memory using WDS or
equivalent.
•
Start engine and perform OBD-II DRIVE
MODE 1.
(See 01–02B–10 Mode 1 (PCM adaptive
memory procedure drive mode).)
•
Is PENDING CODE of same DTC present?
Yes Replace PCM, then go to next step.
No
Go to next step.
24
VERIFY AFTER REPAIR PROCEDURE
•
Perform “After Repair Procedure”.
(See 01–02B–9 AFTER REPAIR
PROCEDURE [FS].)
•
Is there any DTC present?
Yes Go to applicable DTC inspection.
(See 01–02B–15 DTC TABLE [FS].)
No
Troubleshooting completed.
STEP
INSPECTION
ACTION
1712-1U-01G(01-02B).fm 74 ページ 2001年6月29日 金曜日 午後3時24分
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–75
01–02B
DTC P0301, P0302, P0303, P0304 [FS]
A3U010201085W02
Diagnostic procedure
DTC P0301
DTC P0302
DTC P0303
DTC P0304
Cylinder No.1 misfire detected
Cylinder No.2 misfire detected
Cylinder No.3 misfire detected
Cylinder No.4 misfire detected
DETECTION
CONDITION
•
PCM monitors CKP sensor input signal interval time. PCM calculates the change of the interval time for
each cylinder. If the change of interval time exceeds the pre programmed criteria, PCM detects a misfire in
the corresponding cylinder. While the engine is running, PCM counts the number of misfires that occurred
at 200 crankshaft revolutions and 1,000 crankshaft revolutions and calculates misfire ratio for each
crankshaft revolution. If the ratio exceeds the pre programmed criteria, PCM determines that a misfire,
which can damage the catalytic converter or affect emission performance, has occurred.
Diagnostic support note
•
This is a continuous monitor (MISFIRE).
•
MIL illuminates if PCM detects the misfire which affects emission performance in two consecutive drive
cycles.
•
PENDING CODE is available if PCM detects the misfire which affects emission performance during first
drive cycle.
•
MIL flashes if PCM detects the misfire which can damage the catalytic converter during first drive cycle.
Therefore, PENDING CODE is not available while MIL flashes.
•
FREEZE FRAME DATA is available.
•
DTC is stored in PCM memory.
POSSIBLE
CAUSE
•
Spark plug malfunction
•
High-tension lead malfunction
•
Fuel injector malfunction
•
Air suction in intake-air system (between dynamic chamber and cylinder head)
•
Inadequate engine compression due to engine internal malfunction
•
Related connector or terminal malfunction
•
Related wiring harness malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
•
Has FREEZE FRAME DATA been recorded?
Yes Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to
next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•
Check for related Service Bulletins availability.
•
Is any related repair information available?
Yes Perform repair or diagnosis according to available repair
information.
•
If vehicle is not repaired, go to next step.
No
Go to next step.
3
VERIFY RELATED PENDING CODE OR
STORED DTCS
•
Turn ignition key to OFF then start engine.
•
Verify related pending code or stored DTCs.
•
Are other DTCs present?
Yes Go to appropriate DTC troubleshooting.
(See 01–02B–15 DTC TABLE [FS].)
No
Go to next step.
4
VERIFY CURRENT INPUT SIGNAL STATUS
(IGNITION KEY TO ON /IDLE)
•
Access ECT, IAT, MAF, RPM, TP and VS PIDs
using WDS or equivalent.
(See 01–40B–7 PCM Inspection Using the
SST (WDS or equivalent).)
•
Is there any signal that is far out of
specification when ignition switch is ON and
engine runs at idle?
Yes Inspect suspected circuit and/or part according to
inspection results. Then go to Step 12.
(See 01–40B–7 PCM Inspection Using the SST (WDS or
equivalent).)
No
Go to next step.
5
VERIFY CURRENT INPUT SIGNAL STATUS
UNDER TROUBLE CONDITION
•
Inspect same PIDs as in Step 4 while
simulating FREEZE FRAME DATA condition.
•
Is there any signal which causes drastic
changes?
Yes Inspect suspected circuit and/or part according to
inspection results. Then go to Step 13.
(See 01–40B–7 PCM Inspection Using the SST (WDS or
equivalent).)
No
Go to next step.
6
INSPECT SPARK PLUG CONDITION
•
Turn ignition key to OFF.
•
Remove spark plug from suspected cylinder.
•
Check spark plug condition:
— Cracks
— Excessive wear
— Gap
— Wet
•
Is any problem found on spark plug?
Yes
•
If spark plug is wet, fuel flooding is suspected. Go to
Step 13.
•
If spark plug has cracks, excessive wear or improper
gap, replace faulty spark plug. Then go to Step 13.
No
Go to next step.
1712-1U-01G(01-02B).fm 75 ページ 2001年6月29日 金曜日 午後3時24分
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст