Mazda CX-9 Grand Touring 2007 Manual page 127

Purge solenoid valve terminal A and main relay No.1 terminal D
Purge solenoid valve terminal B and PCM terminal 1BC
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
REMOVAL/INSTALLATION [MZI-3.5]
CAUTION:
1. Disconnect the negative battery cable. (see BATTERY REMOVAL/INSTALLATION [MZI-3.5] .)
2. Remove in the order indicated in the table.
Fig. 18: Identifying PCV Valve Hose, PCV Valve Heater Control Connector And PCV Valve
Courtesy of MAZDA MOTORS CORP.
3. Install in the reverse order of removal.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Emission System (MZI-3.5) - CX-9
A new PCV valve must be installed if removed from the cylinder head
cover.
Upon removal, damage will occur to the locking mechanism on the
PCV valve.