DTC P0443 [MZI-3.7]
DTC P0443 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
12
INSPECT FOR SMALL LEAK BETWEEN
FUEL TANK VAPOR TUBE AND FUEL
TANK FILLER PIPE
z
Transfer the plug from the fuel vapor hose
joint to the fuel tank vapor tube.
z
Pressurize EVAP system to 3.48 kPa (PID
FTP_H2O displays "14").
z
Using the ultrasonic leak detector, check the
fuel tank vapor tube to the fuel tank for
leaks. Check the FTP sensor, fuel tank vapor
tube and the fuel-filler pipe.
z
Is a leak detected?
Yes
Repair or install a new component. Go to
the next step.
No
Reconnect the fuel vapor tube to the fuel
vapor hose joint. Go to Step 13.
13
EVAP SYSTEM LEAK TEST
z
Connect all disconnected connectors and
hoses.
z
Perform the EVAP System Leak Test. (See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-3.7]
.)
z
Are the test results normal?
Yes Go to the next step.
No
Leakage still exists. Locate leak point and
repair. Repeat this step.
14
VERIFY TROUBLESHOOTING OF DTC
P0442, P0456 HAS BEEN COMPLETED
z
Verify that all disconnected connectors are
reconnected.
z
Turn the ignition switch to the ON position
(Engine off).
z
Clear the DTC from the PCM memory using
the M-MDS.
z
Start the engine and run it at idle.
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step.
(See
PCM
REMOVAL/INSTALLATION [MZI-
3.7]
.)
No
Go to the next step.
DTC P0443
Purge solenoid valve circuit
DETECTION
CONDITION
z
The PCM monitors the state of the purge solenoid valve circuit output driver. The
test fails when the signal moves outside the minimum or maximum limit for the
commanded state.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:37 AM
Page 204
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