Mazda CX-9 Grand Touring. Manual - part 277

 

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Mazda CX-9 Grand Touring. Manual - part 277

 

 

4

INSPECT AIR CLEANER ELEMENT 

Remove air cleaner element with the 
engine running.  

Is the engine speed increased?  

Yes Replace the air cleaner element, then go to Step 9.

No

Go to the next step.

5

INSPECT FOR AIR SUCTION AT 
INTAKE AIR SYSTEM  

Inspect for air leakage at the 
following: 

Around connection of 
dynamic chamber and intake 
manifold  

Around connection of intake 
manifold and cylinder head  

Is air leakage found?  

Yes

Repair or replace the suspected part, then go to 
Step 9.

No

Go to the next step.

6

INSPECT THROTTLE BODY 
PASSAGE  

Is the throttle body clogged?  

Yes

Clean or replace the throttle body passage, then go 
to Step 9.

No

Go to the next step.

7

INSPECT ENGINE COMPRESSION  

Inspect the engine compression. (See 
COMPRESSION INSPECTION 
[MZI-3.7] .)  

Is the engine compression normal?  

Yes Go to the next step.

No

Overhaul the engine, then go to the next step.

8

INSPECT FOR RESTRICTION IN 
EXHAUST SYSTEM AND TWC  

Is there any restriction?  

Yes

Replace malfunctioning part, then go to the next 
step.

No

Go to the next step.

9

VERIFY TROUBLESHOOTING OF 
DTC P0505 HAS BEEN COMPLETED 

Verify that all disconnected 
connectors are reconnected.  

Turn the ignition switch to the ON 
position (Engine off).  

Clear the DTC from the PCM 
memory using the M-MDS.  

Perform the KOEO and KOER self-
test.  

Retrieve the DTCs using the M-
MDS.  

Yes

Replace the PCM, then go to the next step. (See 
PCM REMOVAL/INSTALLATION [MZI-
3.7] .)

No

Go to the next step.

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 241 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0506 [MZI-3.7] 

DTC P0506 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

DIAGNOSTIC PROCEDURE 

DTC P0506 (MZI-3.7) DIAGNOSTIC PROCEDURE 

Is the PENDING CODE for this 
DTC present?  

10

VERIFY AFTER REPAIR 
PROCEDURE  

Perform the "AFTER REPAIR 
PROCEDURE". 

(See AFTER REPAIR 
PROCEDURE [MZI-3.7].) 

Are any DTC present?  

Yes

Go to the applicable DTC inspection. (See DTC 
TABLE [MZI-3.7].)

No

Troubleshooting completed.

DTC P0506

IAC system RPM lower than expected

DETECTION 

CONDITION 

This DTC is set when the PCM detects an engine idle speed that is less 
than the desired engine speed.  

POSSIBLE CAUSE 

Engine mechanical concern  

Intake air restriction  

Exhaust restriction  

Sludged throttle body  

Vacuum leakage  

Throttle body malfunction  

PCM malfunction  

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA 
HAS BEEN RECORDED  

Has FREEZE FRAME DATA been 
recorded?  

Yes Go to the next step.

No

Record FREEZE FRAME DATA on the repair 

order, then go to the next step.

2

VERIFY RELATED REPAIR 
INFORMATION AVAILABILITY  

Verify related Service Bulletins 
and/or on-line repair information 
availability.  

Yes

Perform repair or diagnosis according to the 
available Service Bulletins. 

If the vehicle is not repaired, then go to the 
next step.  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 242 

© 2005 Mitchell Repair Information Company, LLC. 

Is any related Service Bulletins 
available?  

No

Go to the next step.

3

VERIFY RELATED PENDING OR 
STORED DTCS  

Turn the ignition switch off then to 
the ON position (Engine off).  

Verify pending code or stored 
DTCs using the M-MDS.  

Is other DTC present?  

Yes

Repair applicable DTCs. (See DTC TABLE [MZI-
3.7].)

No

Go to the next step.

4

INSPECT AIR CLEANER ELEMENT
 

Remove air cleaner element with 
the engine running.  

Is the engine speed increased?  

Yes Replace the air cleaner element, then go to Step 7.

No

Go to the next step.

5

INSPECT INTAKE AIR SYSTEM 
FOR EXCESSIVE AIR SUCTION  

Visually inspect the hose in intake 
air system for damages.  

Is there any malfunction?  

Yes

Repair or replace the malfunctioning part, then go 
to Step 7.

No

Go to the next step.

6

INSPECT THROTTLE BODY 
PASSAGE  

Is the throttle body clogged?  

Yes

Clean or replace the throttle body passage, then go 
to the next step.

No

Go to the next step.

7

VERIFY TROUBLESHOOTING OF 
DTC P0506 HAS BEEN 
COMPLETED  

Verify that all disconnected 
connectors reconnected.  

Start the engine.  

Clear the DTC from the PCM 
memory using the M-MDS.  

Depress brake pedal for 14 s or 
more.  

Is PENDING CODE for this DTC 
present?  

Yes

Replace the PCM, then go to the next step. (See 
PCM REMOVAL/INSTALLATION [MZI-
3.7] .)

No

Go to the next step.

8

VERIFY AFTER REPAIR 
PROCEDURE  

Perform the "AFTER REPAIR 
PROCEDURE". 

Yes

Go to the applicable DTC inspection. (See DTC 
TABLE [MZI-3.7].)

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 243 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0507 [MZI-3.7] 

DTC P0507 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

DIAGNOSTIC PROCEDURE 

DTC P0507 (MZI-3.7) DIAGNOSTIC PROCEDURE 

(See AFTER REPAIR 
PROCEDURE [MZI-3.7].) 

Are any DTCs present?  

No

Troubleshooting completed.

DTC P0507

IAC system RPM higher than expected

DETECTION 

CONDITION 

This DTC is set when the PCM detects an engine idle speed that is more 
than the desired engine speed.  

POSSIBLE CAUSE 

Intake air leak after throttle body  

Vacuum leakage  

EVAP system malfunction  

Throttle body malfunction  

PCM malfunction  

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS 
BEEN RECORDED  

Has FREEZE FRAME DATA been 
recorded?  

Yes Go to the next step.

No

Record FREEZE FRAME DATA on the repair 

order, then go to the next step.

2

VERIFY RELATED REPAIR 
INFORMATION AVAILABILITY  

Verify related Service Bulletins and/or 
on-line repair information availability. 

Is any related Service Bulletins 
available?  

Yes

Perform repair or diagnosis according to the 
available Service Bulletins. 

If the vehicle is not repaired, then go to 
the next step.  

No

Go to the next step.

3

VERIFY RELATED PENDING OR 
STORED DTCS  

Turn the ignition switch off then to the 
ON position (Engine off).  

Verify pending code or stored DTCs 
using the M-MDS.  

Is other DTC present?  

Yes

Repair applicable DTCs. (See DTC TABLE 
[MZI-3.7].)

No

Go to the next step.

INSPECT AIR CLEANER ELEMENT  

Replace the air cleaner element, then go to Step 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 244 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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