Mazda MX-5 Miata / Grand Touring. Manual - part 120

Fig. 27: Disconnecting Fuel Pump Unit Connector 
Courtesy of MAZDA MOTORS CORP. 

4. Inspect for continuity between fuel pump unit terminals B and D. 



If there is continuity, perform the CIRCUIT OPEN/SHORT INSPECTION.  



If there is no continuity, replace the fuel pump. (See FUEL PUMP UNIT 
DISASSEMBLY/ASSEMBLY [LF1] .)  

CIRCUIT OPEN/SHORT INSPECTION 

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

Open circuit  



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



Fuel pump unit terminal D and body ground 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Fuel System - MX-5 Miata

  

Fig. 28: Identifying Fuel Pump Unit Terminal 
Courtesy of MAZDA MOTORS CORP. 

FUEL STATIC PRESSURE INSPECTION 

QUICK RELEASE CONNECTOR (FUEL SYSTEM) REMOVAL/INSTALLATION 
[LF] 

QUICK RELEASE CONNECTOR TYPE 

NOTE:



The fuel static pressure inspection cannot be performed because the 
pressure regulator is integrated with the fuel pump unit.  

WARNING:



Fuel is very flammable liquid. If fuel spills or leaks from the 
pressurized fuel system, it will cause serious injury or death and 
facility breakage. Fuel can also irritate skin and eyes. To prevent 
this, always complete the "

FUEL LINE SAFETY PROCEDURE

", while 

referring to the BEFORE SERVICE PRECAUTION [LF] .  

CAUTION:



There are two types of quick release connectors. Verify the type and 
location, and install/remove properly.  

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Fuel System - MX-5 Miata

  

Fig. 29: Identifying Quick Release Connector (Fuel System) 
Courtesy of MAZDA MOTORS CORP. 

TYPE A REMOVAL 

1. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel 

from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION [LF] .) 

2. Rotate the release tab on the quick release connector to the stopper position. 

CAUTION:



The quick release connector may be damaged if the release tab 
is bent excessively. Do not expand the release tab over the 
stopper.  

NOTE:



The fuel hose can be removed by pushing it to the pipe side to 
release the lock.  

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Fuel System - MX-5 Miata

  

Fig. 30: Releasing Tab On Quick Release Connector To Stopper Position 
Courtesy of MAZDA MOTORS CORP. 

3. Pull out the fuel hose straight from the fuel pipe and disconnect it. 

Fig. 31: View Of Fuel Hose & Fuel Pipe 
Courtesy of MAZDA MOTORS CORP. 

4. Cover the disconnected quick release connector and fuel pipe with vinyl sheeting or a similar material to 

prevent it from becoming scratched or dirty. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Fuel System - MX-5 Miata