Mazda Protege 5. Manual — part 70
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–100
19
INSPECT ATTACHED ACCESSORIES ON FUEL
TANK
•
Remove fuel tank and visually inspect for
damage, insufficient sealing or poorly attached
accessories on fuel tank, such as fuel gauge.
•
Is it okay?
Yes Go to next step.
No
Repair or replace fuel tank or sealing, then go to Step 27.
20
INSPECT FUEL SHUT-OFF VALVE
•
Inspect fuel shut-off valve for ventilation.
(See 01–14–13 FUEL TANK INSPECTION.)
•
Is it okay?
Yes Go to next step.
No
Replace fuel tank, then go to Step 27.
21
INSPECT ROLLOVER VALVE
•
Inspect rollover valve for ventilation.
•
Is it okay?
Yes Inspect following and repair or replace for detached,
incorrectly installed or cracked hoses:
•
Charcoal canister
•
Fuel tank (include fuel shut-off valve and rollover valve)
•
Fuel tank pressure sensor
Then go to Step 27.
No
Replace fuel tank, then go to Step 27.
22
INSPECT LEAKAGE FROM CHARCOAL
CANISTER TO PURGE SOLENOID VALVE
•
Implement “01-03B ENGINE CONTROL
SYSTEM OPERATION INSPECTION [FS],
Evaporative Leak System Inspection Using
Vacuum Pump, Inspection from charcoal
canister to purge solenoid valve”.
(See 01–03B–55 Inspection from charcoal
canister to purge solenoid valve.)
•
Does voltage change under to specified
readings and hold for a minimum of 2
minutes?
Yes Go to Step 27.
No
Go to next step.
23
INSPECT CATCH TANK
•
Remove catch tank and inspect for plugging,
damages and pinhole using vacuum pump.
•
Is it okay?
Yes Go to next step.
No
Replace catch tank, then go to Step 27.
24
INSPECT PURGE SOLENOID VALVE
OPERATION
•
Inspect purge solenoid valve
(See 01–16–12 PURGE SOLENOID VALVE
INSPECTION.)
•
Is purge solenoid valve okay?
Yes Go to next step.
No
Replace purge solenoid valve, then go to Step 27.
25
INSPECT CHARCOAL CANISTER
•
Remove charcoal canister and inspect for
plugging, damage and pinhole.
•
Is it okay?
Yes Go to next step.
No
Replace charcoal canister, then go to Step 27.
26
INSPECT CDCV OPERATION
•
Inspect CDCV.
(See 01–16–10 CANISTER DRAIN CUT
VALVE (CDCV) INSPECTION.)
•
Is CDCV okay?
Yes Go to next step.
No
Replace CDCV, then go to next step.
27
DECIDE ON AFTER REPAIR PROCEDURE
ACCORDING TO REPAIR SHOP CONDITION
•
Clear DTC from memory using WDS or
equivalent.
•
Is repair shop possible to perform Drive Mode
4?
Yes Go to next step.
No
Go to step 31.
STEP
INSPECTION
ACTION
1712-1U-01G(01-02B).fm 100 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–101
01–02B
End Of Sie
28
VERIFY MONITORING CONDITION FOR
EVAPORATIVE SYSTEM TEST OR DRIVE
MODE 4
•
Turn ignition key to ON (Engine OFF).
•
Verify that following conditions are met.
— Barometric pressure: 69.7 kPa {523 mmHg,
20.5 inHg} or higher
— Engine coolant temperature: –10.0—22.0
°°°°
C {14.0—71.6
°°°°
F} [at barometric pressure
69.7 kPa {523 mmHg, 20.5 inHg}]
— Intake air temperature: –10—60
°°°°
C {50—
140
°°°°
F}
— Fuel tank level: 35—85%
•
Is there any conditions that is out of
specification?
Yes Take corrective action (e.g. cool down engine), then repeat
this step.
Note
•
Readings need to be in the indicated ranges to
perform Drive Mode.
No
Go to next step.
29
MONITOR EVAP SYSTEM BY DRIVE MODE 4
•
Run OBD-II Drive Mode 4.
(See 01–02B–12 Mode 4 (EVAP system repair
verification drive mode).)
•
Stop vehicle and access ON BOARD SYSTEM
READINESS TESTS to inspect Drive Mode
completion status.
•
Has EVAPORATIVE PURGE SYSTEM been
monitored?
Yes Go to next step.
No
Go back to Step 28.
30
VERIFY EVAP SYSTEM REPAIRED
•
Access DIAGNOSTIC MONITORING TEST
RESULTS.
•
Verify TEST ID 10:22:00 value.
(See 01–02B–9 Diagnostic Monitoring Test
Results Access Procedure.)
•
Is it below maximum value?
Yes Go to Step 32.
No
Replace PCM, then go to Step 32.
31
INSPECT WHOLE EVAP CONTROL SYSTEM
•
Implement “01-03B ENGINE CONTROL
SYSTEM OPERATION INSPECTION [FS],
Evaporative System Leak Inspection Using
Vacuum Pump, Whole system inspection”.
(See 01–03B–55 Whole system inspection.)
•
Does voltage change under to specified
readings and hold for minimum of 2 minutes?
Yes Go to Step 32.
No
Replace PCM, then go to Step 32.
32
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
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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–102
DTC P0456 [FS]
A3U010201086W10
Diagnostic procedure
DTC P0456
Evaporative emission control system leak detected (very small leak)
DETECTION
CONDITION
•
PCM measures the fuel tank pressure ftp a and ftp b when monitoring conditions are met. If the difference
between ftp a and ftp b exceeds the threshold, PCM determines that EVAP system has a very small leak
(0.5 mm {0.02 in} hole equivalent).
MONITORING CONDITION
— ECT at engine start 35
°°°°
C {95
°°°°
F} or below
— ECT 70—108
°°°°
C {158—226
°°°°
F}
— Atmospheric pressure: above 69.7 kPa {523 mmHg, 20.5 inHg}
— Remaining fuel 35%—85%
— IAT -10—60
°°°°
C {14—140
°°°°
F}
— Throttle opening angle closed
— 16 minutes or less after engine start
Diagnostic support note
•
This is an intermittent monitor (Evaporative leak monitor).
•
MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.
•
PENDING CODE are stored if PCM detects the above malfunction condition during first drive cycle.
•
DIAGNOSTIC MONITORING TEST RESULTS is available.
•
FREEZE FRAME DATA is available.
•
DTC is stored in the PCM memory.
POSSIBLE
CAUSE
•
Purge solenoid valve malfunction
•
Canister drain cut valve (CDCV) malfunction
•
Charcoal canister malfunction
•
Catch tank malfunction
•
Fuel cap malfunction
•
Fuel tank malfunction
•
Fuel pump unit poor seal
•
EVAP hose damaged or loose
•
EVAP pipe damaged
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
•
Has FREEZE FRAME PID DATA been
recorded?
Yes Go to next step.
No
Record FREEZE FRAME PID DATA on repair order, then
go to next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•
Check for related Service Bulletins and/or on-
line repair information 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 DTC
•
Turn ignition key to OFF then ON (Engine
OFF).
•
Verify related pending code or stored DTC.
•
Is other DTC present?
Yes Go to appropriate DTC inspection.
No
Go to next step.
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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–103
01–02B
4
CLASSIFY INTERMITTENT CONCERN OR
CONTINUOUS CONCERN
•
Perform evaporative system leak inspection.
(See 01–03B–54 Evaporative System Leak
Inspection Using Leak Tester.)
•
Is test result failed (red light turns on)?
Yes Go to next step.
No
Intermittent concern existing. Inspect purge solenoid valve
and CDCV circuit for intermittent concern.
(See 01–03B–4 INTERMITTENT CONCERN
TROUBLESHOOTING [FS].)
5
LOCATE LEAK POINT
•
Check leakage for the following using
Ultrasonic leak detector.
— Charcoal canister
— Catch tank
— Fuel cap
— EVAP hoses and pipes
— Fuel tank
•
Is leakage found?
Yes Repair leakage or replace part, then go to Step 10.
No
Go to next step.
6
INSPECT PURGE SOLENOID VALVE
•
Disconnect purge solenoid valve tube that is
connected to intake manifold.
•
Connect vacuum pump to purge solenoid
valve.
•
Apply vacuum and wait for 5 seconds.
•
Is vacuum maintained?
Yes Go to next step.
No
Replace purge solenoid valve, then go to Step 10.
7
INSPECT CDCV
•
Connect all disconnected connectors and
hoses.
•
Place clamp on CDCV hose between CDCV
and air filter.
•
Perform evaporative system leak inspection.
(See 01–03B–54 Evaporative System Leak
Inspection Using Leak Tester.)
•
Is test result failed (red light turns on)?
Yes Go to Step 10.
No
Go to next step.
8
CONFIRM CDCV LEAKAGE
•
Remove clamp.
•
Perform evaporative system leak inspection.
(See 01–03B–54 Evaporative System Leak
Inspection Using Leak Tester.)
•
Is test result failed (red light turns on)?
Yes Replace CDCV, then go to Step 11.
No
Go to Step 11.
9
INSPECT FUEL PUMP UNIT INSTALLATION
•
Remove fuel tank.
•
Visually inspect for damage, insufficient
sealing or poorly installed fuel pump unit.
•
Is it okay?
Yes Go to next step.
No
Repair or replace fuel tank or sealing, then go to next step.
10
PERFORM LEAK INSPECTION
•
Connect all disconnected connectors and
hoses.
•
Perform evaporative system leak inspection.
(See 01–03B–54 Evaporative System Leak
Inspection Using Leak Tester.)
•
Is test result failed (red light turns on)?
Yes Leakage still exists. Locate leak point and repair.
Then go to next step.
No
Go to next step.
11
VERIFY MONITORING CONDITION FOR
EVAPORATIVE SYSTEM TEST OR DRIVE
MODE 5
•
Turn ignition key to ON (Engine OFF).
•
Access ECT and FTL V PIDs using NGS
tester.
— ECT: 35
°°°°
C {95
°°°°
F} or below
— FTL V: 1.3 V—3.75 V (35—85% fuel tank
level equivalent)
— IAT: -10—60
°°°°
C {14—140
°°°°
F}
Note
•
All PIDs must be within specification to
start monitor.
•
Is there any PID that is out of specification?
Yes Cool down engine with fan or adjust fuel level, then go to
next step.
No
Go to next step.
STEP
INSPECTION
ACTION
1712-1U-01G(01-02B).fm 103 ページ 2001年6月29日 金曜日 午後3時24分
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