Dtc P0443[L3 With Tc] - Mazda CX-7 2007 Workshop Manual

STEP
6 INSPECT PURGE SOLENOID VALVE
• Inspect purge solenoid valve is stuck closed.
(See01-16-9 PURGE SOLENOID VALVE
INSPECTION[L3 WITH TC].)
• Is the purge solenoid valve normal?
7 INSPECT EVAP SYSTEM LEAK DETECTION
PUMP
• Connect all disconnected connectors and
hoses.
• Place the clamp on the EVAP system leak
detection pump hose between the EVAP
system leak detection pump and the air filter.
• Perform the evaporative system leak
inspection.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Does the test result fail?
8 CONFIRM EVAP SYSTEM LEAK DETECTION
PUMP LEAKAGE
• Remove the clamp.
• Perform the evaporative system leak
inspection.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Does the test result failed?
9 INSPECT FUEL PUMP UNIT INSTALLATION
• Remove the fuel tank.
• Visually inspect for damage, insufficient sealing
or a poorly installed pump unit.
• Is it normal?
10 PERFORM LEAK INSPECTION
• Connect all disconnected connectors and
hoses.
• Perform the evaporative system leak
inspection.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Does the test result failed?
11 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie

DTC P0443[L3 WITH TC]

DTC P0443 EVAP control system purge control valve circuit malfunction
• PCM monitors the input voltages from the purge solenoid valve. If the voltage remains low or high, the PCM
determines that the purge solenoid valve circuit has a malfunction.
Diagnostic support note
• This is an continuous monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in
DETECTION
CONDITION
one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
• Purge solenoid valve malfunction
• Connector or terminal malfunction
• Short to ground in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB
POSSIBLE
• Open circuit in the wiring harness between the main relay and purge solenoid valve terminal A
CAUSE
• Open circuit in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB
• Short to the power supply between purge solenoid valve terminal B and PCM terminal 2AB
• PCM malfunction
01-02–140
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Replace the purge solenoid valve, then go to Step 10.
Yes Go to Step 9.
No Go to the next step.
Yes Replace the EVAP system leak detection pump, then go to
Step 10.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the fuel tank or sealing, then go to the
next step.
Yes Leakage still exists. Locate the leak point and repair.
Then go to the next step.
No Go to the next step
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No Troubleshooting completed.
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