Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING [ENGINE CONTROL KL]
STEP
INSPECTION
ACTION
21 INSPECTION OF VACUUM HOSES
• Key off.
• Pull slightly on vacuum hoses at pressure
control valve, FTP sensor, fuel filler pipe
and fuel tank.
• Check for loose connections.
• Visually inspect for improperly connections
and cracked hoses between fuel tank and
FTP sensor, fuel tank and pressure control
valve, fuel filler pipe and pressure control
valve, pressure control valve and charcoal
canister.
• Confirm air tightness of vacuum hose using
vacuum pump.
• Is fault detected?
Yes
SERVICE or REPLACE as necessary.
RECONNECT all components.
RESET PCM to completely clear DTCs.
o* After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No RECONNECT all components.
Go to next step.
22 CHECK FOR PRESSURE CONTROL VALVE
• Remove and inspect pressure control
valve.
• Is fault detected?
Yes
REPLACE pressure control valve.
RECONNECT all components.
RESET PCM to completely clear DTCs.
o - After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No RECONNECT all components.
Go to next step.
23 INSPECTION FUEL FILLER PIPE
• Remove fuel filler pipe.
• Visually inspect for fuel filler pipe damage.
•
Is fault detected?
Yes REPLACE fuel filler pipe.
RECONNECT all components.
RESET PCM to completely clear DTCs.
xr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No RECONNECT all components.
Go to next step.
24 CHECK CANISTER DRAIN CUT VALVE
(CDCV)
• Key off.
• Remove CDCV.
• Confirm CDCV is not damaged, and that air
vents are tight when at ON.
• Is fault detected?
Yes
REPLACE CDCV.
RECONNECT all components.
RESET PCM to completely clear DTCs.
o After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No Inspect and repair any detached, incorrectly installed or
cracked hoses between charcoal canister and CDCV.
RECONNECT all components.
RESET PCM to completely clear DTCs.
tr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
01-01B-80