Fig. 17: Identifying PCV Valve Heater Control
Courtesy of MAZDA MOTORS CORP.
Open circuit
z
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
z
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]
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.
NOTE:
z
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.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE Emission System (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:04:04 AM
Page 13
© 2005 Mitchell Repair Information Company, LLC.
