Mazda CX-9 Grand Touring 2009 Manual page 803

2008 ENGINE PERFORMANCE Emission System (MZI-3.7) - Mazda CX-9
Fig. 17: Identifying PCV Valve Heater Control
Courtesy of MAZDA MOTORS CORP.
Open circuit
If there is no continuity, the circuit is open. Repair or replace the harness.
Purge solenoid valve terminal A and main relay No.1 terminal D
Purge solenoid valve terminal B and PCM terminal 1 BC
Short circuit
If there is continuity, the circuit is short. Repair or replace the harness.
Purge solenoid valve terminal A and power supply
Purge solenoid valve terminal A and body ground
Purge solenoid valve terminal B and power supply
Purge solenoid valve terminal B and body ground
POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [MZI-3.7]
NOTE:
The PCV valve cannot be reassembled once it is removed because the
tabs will have been broken. Inspect the PCV valve without removing it
from the vehicle.
AIRFLOW INSPECTION
1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
2. Disconnect the PCV valve hose from the PCV valve. (See POSITIVE CRANKCASE VENTILATION
(PCV) VALVE REMOVAL/INSTALLATION [MZI-3.7].)
3. Verify that there is no airflow when pressure is applied to the PCV valve using a vacuum pump.
2008 Mazda CX-9 Grand Touring