Mazda CX-9 Grand Touring. Manual - part 202

 

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Mazda CX-9 Grand Touring. Manual - part 202

 

 

Fig. 19: Identifying PCV Valve Heater Control Wiring Harness Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Fig. 20: Identifying Fuse Box (Main Relay No.1) 
Courtesy of MAZDA MOTORS CORP. 

Fig. 21: Identifying PCM Wiring Harness Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Open circuit  

 

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 15 

© 2005 Mitchell Repair Information Company, LLC. 

If there is no continuity, there is an open circuit. Repair or replace the wiring harness. 

PCV valve heater control terminal A and main relay No.1 terminal D  

PCV valve heater control terminal B and PCM terminal 2BL  

Short circuit  

If there is continuity, there is a short circuit. Repair or replace the wiring harness. 

PCV valve heater control terminal A and power supply  

PCV valve heater control terminal A and body ground  

PCV valve heater control terminal B and power supply  

PCV valve heater control terminal B and body ground  

POSITIVE CRANKCASE VENTILATION (PCV) VALVE 
REMOVAL/INSTALLATION [MZI-3.7] 

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

2. Remove in the order indicated in the table. 

CAUTION:

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.  

 

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 16 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 22: Identifying PCV Valve Hose, PCV Valve Heater Control Connector, PCV Valve And O-
Ring
 
Courtesy of MAZDA MOTORS CORP. 

3. Install in the reverse order of removal.  

POSITIVE CRANKCASE VENTILATION (PCV) VALVE HEATER FITTING 
INSPECTION [MZI-3.7] 

RESISTANCE INSPECTION 

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

2. Disconnect the PCV valve heater fitting connector.  

3. Measure the resistance between the PCV valve terminals. 

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

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

PCV valve heater fitting resistance 10-35 ohms

 

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 17 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 23: Identifying PCV Valve Heater Connector Terminal 
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). 

Fig. 24: Identifying PCV Valve Heater Control Wiring Harness Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Fig. 25: Identifying Fuse Box (Main Relay No.1) 
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 18 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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