Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL FS]
STEP INSPECTION
ACTION
9 CHECK FUEL INJECTOR FOR FLOW AND
LEAKAGE
• Verify flow rate for each fuel injector is Yes Fuel delivery system is not likely to have caused misfire
DTC.
Go to next step.
within specification using SST (49 L018
901).
• Is flow rate for each fuel Injector within
specification?
No REPLACE or CLEAN inoperative fuel injector(s) as
required.
RESET PCM to completely clear DTCs.
tr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
10
CHECK VACUUM SYSTEM Yes Go to next step.
• Inspect all vacuum lines for damage, or
pinched lines, cracks, proper routing and
assembly.
• Is the vehicle vacuum system okay?
No SERVICE the vacuum system.
RESET PCM to completely clear DTCs.
a-
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
11 CHECK EVAPORATIVE EMISSION SYSTEM
Misfire Monitor can be influenced by
Evaporative Emission System. Steps 11— 14
will diagnose Evaporative Emission System.
• Check charcoal canister for fuel saturation.
• Is there excess amount of liquid fuel
present in charcoal canister.
Yes REPLACE charcoal canister.
RESET PCM to completely clear DTCs.
o
t
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No Go to next step.
12 CHECK VACUUM IN EVAPORATIVE
EMISSION SYSTEM
• Check for blockage/restriction or cut hoses
between engine vacuum port and charcoal
canister.
• Check for blockage in fuel tank vent
system.
• Is there fault indicated?
Yes REPLACE damaged vacuum hoses or REMOVE
blockage/restrictions.
RESET PCM to completely clear DTCs.
tr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No Go to next step.
13
CHECK PURGE SOLENOID VALVE
This step will verify the mechanical integrity of
purge solenoid valve. Solenoid and circuit
have been checked electrically and reported
during KOEO self-test.
• Key off.
• Disconnect purge solenoid valve.
• Connect 12 volt DC power source to
solenoid.
Yes Evaporative system is functioning properly.
Go to next step for base engine concerns.
Caution
• Must be observed for proper pin
orientation.
• Connect positive power source to power
circuit and negative lead to purge solenoid
valve circuit at purge solenoid valve
harness connector.
• Apply 53 kPa {407 mmHg, 16 inHg) of
vacuum to manifold side of purge solenoid
valve. Apply power source.
• Does solenoid open and pass air freely?
No REPLACE purge solenoid valve.
RESET PCM to completely clear DTCs.
xr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
14 CHECK FOR BASE ENGINE CONCERNS
The purpose of this step is to determine if
there are any base engine concerns that may
have caused the misfire DTC or drive
concern.
Perform the following tests in order to evaluate
base engine integrity.
• Perfom engine compression test.
• Perform dynamic valve train analysis.
• Check positive crankcase ventilation
system.
• Check possible leakage points.
zr
01-10A COMPRESSION INSPECTION
[FS]
• Is any service required?
Yes SERVICE as necessary.
RESET PCM to completely clear DTCs.
tnr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No
Cause of Misfire DTC is intermittent and diagnosis will be
in Ignition System. Check intermittent poor connection or
component malfunction (SERVICE or REPLACE as
necessary).
E? 0 1-18 IGNITION SYSTEM INSPECTION
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