Mazda CX-9 Grand Touring. Manual - part 420

Fig. 48: Identifying Fuel Pump Unit Wiring Harness-Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Fig. 49: Identifying Main Fuse Block (Fuel Pump Relay) 
Courtesy of MAZDA MOTORS CORP. 

Fig. 50: Identifying PCM Wiring Harness-Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Open circuit  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:00:01 AM

Page 36 

© 2005 Mitchell Repair Information Company, LLC. 



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



No.1 cylinder fuel injector terminal A and PCM terminal 2BJ  



No.2 cylinder fuel injector terminal A and PCM terminal 2BM  



No.3 cylinder fuel injector terminal A and PCM terminal 2BF  



No.4 cylinder fuel injector terminal A and PCM terminal 2BH  



No.5 cylinder fuel injector terminal A and PCM terminal 2BB  



No.6 cylinder fuel injector terminal A and PCM terminal 2BD  



No.1 cylinder fuel injector terminal B and fuel pump relay terminal D  



No.2 cylinder fuel injector terminal B and fuel pump relay terminal D  



No.3 cylinder fuel injector terminal B and fuel pump relay terminal D  



No.4 cylinder fuel injector terminal B and fuel pump relay terminal D  



No.5 cylinder fuel injector terminal B and fuel pump relay terminal D  



No.6 cylinder fuel injector terminal B and fuel pump relay terminal D  

Short circuit  



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



No.1 cylinder fuel injector terminal A and body ground  



No.2 cylinder fuel injector terminal A and body ground  



No.3 cylinder fuel injector terminal A and body ground  



No.4 cylinder fuel injector terminal A and body ground  



No.5 cylinder fuel injector terminal A and body ground  



No.6 cylinder fuel injector terminal A and body ground  



No.1 cylinder fuel injector terminal B and power supply  



No.2 cylinder fuel injector terminal B and power supply  



No.3 cylinder fuel injector terminal B and power supply  



No.4 cylinder fuel injector terminal B and power supply  



No.5 cylinder fuel injector terminal B and power supply  



No.6 cylinder fuel injector terminal B and power supply  

ATOMIZATION 

1. Inspect atomization pattern. 



If the atomization is faulty, replace the fuel injector. (See FUEL INJECTOR 
REMOVAL/INSTALLATION [MZI-3.7].) 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:00:01 AM

Page 37 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 51: Inspecting Atomization Pattern 
Courtesy of MAZDA MOTORS CORP. 

PRESSURE REGULATOR INSPECTION [MZI-3.7] 

1. Perform "FUEL LINE PRESSURE INSPECTION". (See FUEL LINE PRESSURE INSPECTION 

[MZI-3.7].)  

NOTE:



Due to the adoption of the mechanical returnless fuel system, the pressure 
regulator cannot be inspected separately.  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:00:01 AM

Page 38 

© 2005 Mitchell Repair Information Company, LLC. 

2008 HVAC

Control System (HVAC) - Mazda CX-9 

HVAC CONTROL SYSTEM LOCATION INDEX 

Fig. 1: Identifying HVAC Control System Location Index (1 Of 2) 
Courtesy of MAZDA MOTORS CORP. 

 

2008 Mazda CX-9 Grand Touring 

2008 HVAC Control System (HVAC) - Mazda CX-9

  

 

2008 Mazda CX-9 Grand Touring 

2008 HVAC Control System (HVAC) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:12:35 AM

Page 1 

© 2005 Mitchell Repair Information Company, LLC. 

Microsoft 

 

Sunday, November 15, 2009 10:12:43 AM

Page 1 

© 2005 Mitchell Repair Information Company, LLC.