Mazda CX-9 Grand Touring. Manual — part 418
side connector terminal B.
If as specified, inspect the following:
Fuel pump continuity
If not within the specification, inspect the following:
Fuel pump relay
Wiring harnesses and connectors between battery-fuel pump relay-fuel pump
Standard
B+ (Ignition switch at ON)
Fig. 35: Identifying Fuel Pump Unit Wiring Harness-Side Connector
Courtesy of MAZDA MOTORS CORP.
6. Disconnect the jumper wire.
4. Complete the "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION [MZI-
3.7].)
CONTINUITY INSPECTION
1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
2. To remove the service hole cover, remove the following parts:
1. Second-row seat (See SECOND-ROW SEAT REMOVAL/INSTALLATION .)
2. Edge cover (See LONG SLIDER REMOVAL/INSTALLATION .)
3. Long slider cover (See LONG SLIDER REMOVAL/INSTALLATION .)
4. Rear heat duct No.3 (See REAR HEAT DUCT COMPONENT
REMOVAL/INSTALLATION .)
5. Service hole cover (See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZI-3.7].)
3. Disconnect the fuel pump unit connector.
4. Inspect for continuity between fuel pump unit connector terminals B and D.
If there is no continuity, replace the fuel pump unit. (See FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-3.7].)
If as specified carry out the "Circuit Open/Short Inspection".
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 28
© 2005 Mitchell Repair Information Company, LLC.
Fig. 36: Identifying Fuel Pump Unit Wiring Harness-Side Connector
Courtesy of MAZDA MOTORS CORP.
CIRCUIT OPEN/SHORT INSPECTION
1. Inspect the following wiring harnesses for open or short circuit (continuity check).
Fig. 37: Identifying Main Fuse Block (Fuel Pump Relay)
Courtesy of MAZDA MOTORS CORP.
Fig. 38: Identifying Fuel Pump Unit Wiring Harness-Side Connector
Courtesy of MAZDA MOTORS CORP.
Open circuit
If there is no continuity, the circuit is open. Repair or replace the harness.
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 29
© 2005 Mitchell Repair Information Company, LLC.
Fuel pump unit terminal D and body ground
Fuel pump unit terminal C and fuel pump relay terminal D
Short circuit
If there is continuity, the circuit is short. Repair or replace the harness.
Fuel pump unit terminal D and power supply
Fuel pump unit terminal B and body ground
QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [MZI-3.7]
QUICK RELEASE CONNECTOR POSITION
Fig. 39: Identifying Quick Release Connector
Courtesy of MAZDA MOTORS CORP.
REMOVAL
1. Follow "BEFORE SERVICE PRECAUTION" and remove dirt from the connecting surfaces before
performing any work operations. (See BEFORE SERVICE PRECAUTION [MZI-3.7].)
2. Move the retainer upward using a small flathead screwdriver or a similar tool.
3. Pull out the fuel hose straight from the fuel pipe and disconnect it.
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".
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 30
© 2005 Mitchell Repair Information Company, LLC.
4. Cover the disconnected quick release connector and fuel pipe with vinyl sheeting or a similar material to
prevent it from scratches or dirt.
Fig. 40: View Of Quick Release Connector
Courtesy of MAZDA MOTORS CORP.
INSTALLATION
1. Inspect the fuel hose and fuel pipe sealing surface for damage and deformation.
If there is any malfunction, replace it with a new one.
2. Install the quick release connector.
Insert the fuel pipe straight to the end of the quick release connector.
Push down the retainer using a finger.
If the retainer cannot be pushed down, push the fuel pipe further to the quick release
connector.
3. Lightly pull and push the quick release connector a few times by hand, and then verify that it is connected
securely.
4. Inspect all related parts by performing "AFTER SERVICE PRECAUTION". (See AFTER SERVICE
PRECAUTION [MZI-3.7].)
Fig. 41: View Of Quick Release Connector
NOTE:
If the quick release connector O-ring is damaged or has slipped, replace
the fuel hose.
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 31
© 2005 Mitchell Repair Information Company, LLC.
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