Mazda CX-9 Grand Touring. Manual - part 201

 

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Mazda CX-9 Grand Touring. Manual - part 201

 

 

1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)  

2. Remove in the order indicated in the table. 

Fig. 13: Identifying Purge Solenoid Valve & Torque Specifications 
Courtesy of MAZDA MOTORS CORP. 

3. Install in the reverse order of removal.  

PURGE SOLENOID VALVE INSPECTION [MZI-3.7] 

AIRFLOW INSPECTION 

1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)  

2. Disconnect the quick release connector from the purge solenoid valve. (See QUICK RELEASE 

CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZI-3.7].)  

3. Remove the purge solenoid valve. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION 

[MZI-3.7].)  

4. Verify that the airflow is as indicated in the table. 

If as specified in the table, perform the "Circuit Open/Short Inspection".  

If not as specified in the table, inspect the purge solenoid valve.  

CONTINUITY CHART 

Measured condition

Continuity between A-B

When voltage is not applied between terminals A and B

No airflow

When voltage is applied between terminals A and B

Airflow detected

 

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 11 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 14: Identifying Purge Solenoid Valve Connector 
Courtesy of MAZDA MOTORS CORP. 

CIRCUIT OPEN/SHORT INSPECTION 

1. Disconnect the PCM connector.  

2. Inspect the following wiring harness for an open or short circuit (continuity check). 

Fig. 15: Identifying Purge Solenoid Valve Wiring Harness-Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Fig. 16: Identifying PCM Wiring Harness-Side Connector 
Courtesy of MAZDA MOTORS CORP.

 

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 12 

© 2005 Mitchell Repair Information Company, LLC. 

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] 

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:

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. 

If there is airflow, replace the PCV valve. (See POSITIVE CRANKCASE VENTILATION 
(PCV) VALVE REMOVAL/INSTALLATION [MZI-3.7]
.)  

4. Verify that there is airflow when vacuum is applied to the PCV valve. 

If there is no airflow, replace the PCV valve. (See POSITIVE CRANKCASE VENTILATION 
(PCV) VALVE REMOVAL/INSTALLATION [MZI-3.7]
.)  

RESISTANCE INSPECTION 

1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)  

2. Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7] .)  

3. Disconnect the PCV valve heater control connector.  

4. Measure the resistance between the PCV valve heater control terminals. 

If within the specification, perform out the "Circuit Open/Short Inspection".  

If not within the specification, replace the PCV valve. (See POSITIVE CRANKCASE 
VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [MZI-3.7]
.)  

PCV valve heater control resistance 10-35 ohm  

Fig. 18: Identifying PCV Valve Heater Control Connector Terminals 
Courtesy of MAZDA MOTORS CORP. 

CIRCUIT OPEN/SHORT INSPECTION 

1. Disconnect the PCM connector.  

2. Inspect the following wiring harnesses for open or short circuit (continuity check). 

 

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 14 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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