Mazda CX-9 Grand Touring. Manual - part 345

 

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Mazda CX-9 Grand Touring. Manual - part 345

 

 

NO.26 EXHAUST SULPHUR SMELL [MZI-3.7]S 

NO.26 EXHAUST SULPHUR SMELL (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE 
CAUSES
 

DIAGNOSTIC PROCEDURE 

NO.26 EXHAUST SULPHUR SMELL (MZI-3.7) DIAGNOSTIC PROCEDURE 

(See PCM REMOVAL/INSTALLATION [MZI-3.7] .) 

26

EXHAUST SULPHUR SMELL

DESCRIPTION Rotten egg smell (sulphur) from exhaust

POSSIBLE 

CAUSE 

Electrical connectors are disconnected or connected poorly  

Charcoal canister malfunction  

Vacuum lines are disconnected or connected improperly.  

Improper fuel pressure  

Poor fuel quality 

WARNING:

The following troubleshooting flow chart contains fuel system diagnosis and 
repair procedures. Read following warnings before servicing fuel system: 

Fuel vapor is hazardous. It can easily ignite, causing serious injury 
and damage. Always keep sparks and flames away from fuel.  

Fuel line spills and leakage are dangerous. Fuel can ignite and cause 
serious injuries or death and damage. Fuel can also irritate skin and 
eyes. To prevent this, always complete "BEFORE SERVICE 
PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this 
manual. 

(See BEFORE SERVICE PRECAUTION [MZI-3.7] .) 

(See AFTER SERVICE PRECAUTION [MZI-3.7] .) 

CAUTION:

Disconnecting/connecting quick release connector without cleaning it 
may cause damage to fuel pipe and quick release connector. Always 
clean quick release connector joint area before 
disconnecting/connecting, and make sure that it is free of foreign 
material.  

STEP

INSPECTION

RESULTS

ACTION

1

Are any driveability or exhaust 
smoke concerns present?

Yes

Go to the appropriate flow chart.

No

Go to the next step.

Inspect the following: 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:10:06 AM

Page 86 

© 2005 Mitchell Repair Information Company, LLC. 

NO.27 FUEL REFILL CONCERNS [MZI-3.7]

2

Electrical connections  

Vacuum lines  

Fuel quality  

 
Are all items normal?

Yes

Go to the next step.

No

Service if necessary. 

Repeat Step 2.

3

Connect the M-MDS to the 
DLC-2. 
Turn the ignition switch to the 
ON position (Engine off). 
Retrieve any DTCs. 
Are there any DTCs displayed?

Yes

DTC is displayed:  
Go to the appropriate DTC inspection. 
(See DTC TABLE [MZI-3.7] .)

No

No DTC is displayed:  

Go to the next step.

4

Install the fuel pressure gauge 
between the fuel pipe and the 
fuel distributor. 
Start engine and idle it. 
Is fuel line pressure correct at 
idle? 
(See FUEL LINE PRESSURE 
INSPECTION [MZI-3.7]
 .)

Yes

Go to the next step.

No

Low:  

Inspect fuel pump relay and fuel pump circuit. 

Inspect the fuel line for clogging. 

If there is no malfunction, replace the fuel pump unit.

(See FUEL PUMP UNIT 

REMOVAL/INSTALLATION [MZI-3.7] .) 

High:  

Replace the fuel pump unit. 

(See FUEL PUMP UNIT 

REMOVAL/INSTALLATION [MZI-3.7] .)

5

Inspect the charcoal canister for 
fuel saturation. 
Is excess amount of liquid fuel 
present in canister?

Yes

Replace the charcoal canister.

No

Inspect the fuel tank vent system. 

If the fuel tank vent system is normal, suggest trying 

a different brand since sulphur content can vary in 

different fuels. 

If the fuel tank vent system is not normal, repair or 

replace the malfunctioning part.

6

Verify test results. 

If normal, return to diagnostic index to service any additional symptoms. 

(See SYMPTOM DIAGNOSTIC INDEX [MZI-3.7].) 

If malfunction remains, inspect related Service Bulletins and/or On-line Repair 
Information and perform repair or diagnosis. 

If vehicle is repaired, troubleshooting completed.  

If vehicle is not repaired or additional diagnostic information is not available, 
replace the PCM. 

(See PCM REMOVAL/INSTALLATION [MZI-3.7] .) 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:10:06 AM

Page 87 

© 2005 Mitchell Repair Information Company, LLC. 

NO.27 FUEL REFILL CONCERNS (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE 

NO.27 FUEL REFILL CONCERNS (MZI-3.7) DIAGNOSTIC PROCEDURE 

27

FUEL REFILL CONCERNS

DESCRIPTION 

Fuel tank is not filled smoothly.  

POSSIBLE 

CAUSE 

Clogged EVAP pipes  

Nonreturn valve malfunction  

Improper use of fuel nozzle  

Inadequate fuel filling speed 

WARNING:

The following troubleshooting flow chart contains the fuel system 
diagnosis and repair procedures. Read the following warnings before 
servicing the fuel system: 

Fuel vapor is hazardous. It can easily ignite, causing serious 
injury and damage. Always keep sparks and flames away from 
fuel.  

Fuel line spills and leakage are dangerous. Fuel can ignite and 
cause serious injuries or death and damage. Fuel can also 
irritate skin and eyes. To prevent this, always complete 
"BEFORE SERVICE PRECAUTION" and "AFTER SERVICE 
PRECAUTION" described in this manual. 

(See BEFORE SERVICE PRECAUTION [MZI-3.7] .) 

(See AFTER SERVICE PRECAUTION [MZI-3.7] .) 

CAUTION:

Disconnecting/connecting quick release connector without cleaning it 
may cause damage to fuel pipe and quick release connector. Always 
clean quick release connector joint area before 
disconnecting/connecting, and make sure that it is free of foreign 
material.  

STEP

INSPECTION

ACTION

1

Connect the M-MDS to the DLC-2. 
Turn the ignition switch to the ON position 
(Engine off). 
Retrieve any DTCs. 
Are there any DTCs displayed?

Yes

DTC is displayed:  
Go to the appropriate DTC inspection. 
(See DTC TABLE [MZI-3.7] .)

No

No DTC is displayed:  

Go to the next step.

Yes

Inspect for the following: 

Improper use of fuel nozzle  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:10:06 AM

Page 88 

© 2005 Mitchell Repair Information Company, LLC. 

NO.28 FUEL FILLING SHUT OFF CONCERNS [MZI-3.7] 

NO.28 FUEL FILLING SHUT OFF CONCERNS (MZI-3.7) DETECTION CONDITIONS AND 
POSSIBLE CAUSES
 

2

Remove the fuel-filler pipe. 
Make sure the nonreturn valve is installed 
properly. 
Inspect nonreturn valve operation. 
Is the nonreturn valve normal?

Inadequate fuel filling speed  

No

Nonreturn valve is installed improperly: 

Reinstall nonreturn valve to proper 

position.  

 

Nonreturn valve does not operate 

properly:  

Replace nonreturn valve.  

3

Verify test results. 

If normal, return to diagnostic index to service any additional symptoms. 

(See SYMPTOM DIAGNOSTIC INDEX [MZI-3.7].) 

If malfunction remains, inspect related Service Bulletins and/or On-line Repair 
Information and perform repair or diagnosis. 

If vehicle is repaired, troubleshooting completed.  

If vehicle is not repaired or additional diagnostic information is not available, 
replace the PCM. 

(See PCM REMOVAL/INSTALLATION [MZI-3.7] .) 

28

FUEL FILLING SHUT OFF CONCERNS

DESCRIPTION 

Fuel does not shut off properly.  

Clogged EVAP pipes  

Nonreturn valve malfunction  

Fuel shut-off valve malfunction  

Fuel nozzle malfunction  

Fuel nozzle is not inserted correctly. 

WARNING:

The following troubleshooting flow chart contains the fuel system 
diagnosis and repair procedures. Read the following warnings before 
servicing the fuel system: 

Fuel vapor is hazardous. It can easily ignite, causing serious 
injury and damage. Always keep sparks and flames away from 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:10:06 AM

Page 89 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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