Mazda CX-9 Grand Touring. Manual - part 283

DTC P0604 [MZI-3.7] 

DTC P0604 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

DIAGNOSTIC PROCEDURE 

DTC P0604 (MZI-3.7) DIAGNOSTIC PROCEDURE 



Retrieve DTCs using the M-MDS.  



Is the PENDING CODE for this DTC 
present?  

7

VERIFY TROUBLESHOOTING OF DTC 
P0603 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". (See KOEO/KOER SELF TEST 
[MZI-3.7].)  



Retrieve DTCs using the M-MDS.  



Is the 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 
PRECAUTION". (See AFTER 
REPAIR PROCEDURE [MZI-3.7].)  



Are any DTCs present?  

Yes

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

No

Troubleshooting completed.

DTC P0604

Internal control module random access memory (RAM) error

DETECTION CONDITION 



Indicates the PCM RAM has been corrupted.  

POSSIBLE CAUSE 



Module reprogramming  



Aftermarket performance products.  



PCM malfunction  

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS 
BEEN RECORDED  



Has FREEZE FRAME DATA been 

Yes Go to the next step.

No

Record FREEZE FRAME DATA on the repair 

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:39 AM

Page 265 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0605 [MZI-3.7] 

DTC P0605 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

DIAGNOSTIC PROCEDURE 

recorded?  

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, go to the next 
step.  

No

Perform PCM reprograming using the M-MDS, 

then go to next step.

3

VERIFY TROUBLESHOOTING OF 
P0604 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". (See KOEO/KOER SELF 
TEST [MZI-3.7].)  



Retrieve DTCs using the M-MDS.  



Is the PENDING CODE for this DTC 
present?  

Yes

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

No

Go to the next step.

4

VERIFY AFTER REPAIR 
PROCEDURE  



Perform the "After Repair Procedure". 
(See AFTER REPAIR 
PROCEDURE [MZI-3.7].)  



Are any DTCs present?  

Yes

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

No

Troubleshooting completed.

DTC P0605

PCM read only memory (ROM) error

DETECTION CONDITION 



The PCM ROM has been corrupted.  

POSSIBLE CAUSE 



An attempt was made to change the calibration  



Module programming error  



PCM malfunction  

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:39 AM

Page 266 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0605 (MZI-3.7) DIAGNOSTIC PROCEDURE

DTC P0606 [MZI-3.7] 

DTC P0606 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS 
BEEN RECORDED  



Has FREEZE FRAME DATA been 
recorded?  

Yes Go to next step.

No

Record FREEZE FRAME DATA on the repair 

order, then go to 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 
available Service Bulletins. 



If vehicle is not repaired, go to next step.  

No

Perform PCM reprograming using the M-MDS, 

then go to next step.

3

VERIFY TROUBLESHOOTING OF 
DTC P0605 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". (See KOEO/KOER SELF 
TEST [MZI-3.7].)  



Retrieve DTCs using the M-MDS.  



Is the PENDING CODE for this DTC 
present?  

Yes

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

No

Go to next step.

4

VERIFY AFTER REPAIR PROCEDURE 
 



Perform the "AFTER REPAIR 
PRECAUTION". (See AFTER 
REPAIR PROCEDURE [MZI-3.7].) 



Are any DTCs present?  

Yes

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

No

Troubleshooting completed.

DTC P0606

ECM/PCM processor

DETECTION 

CONDITION 



This DTC indicates a register hardback (PCM internal 
communications) error.  

POSSIBLE CAUSE 



PCM malfunction  

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:39 AM

Page 267 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DTC P0606 (MZI-3.7) DIAGNOSTIC PROCEDURE 

DTC P0607 [MZI-3.7] 

DTC P0607 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

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, go to the next 
step.  

No

Perform PCM reprograming using the M-MDS, 

then go to next step.

3

VERIFY TROUBLESHOOTING OF 
P0606 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". (See KOEO/KOER SELF 
TEST [MZI-3.7].)  



Retrieve DTCs using the M-MDS.  



Is the PENDING CODE for this DTC 
present?  

Yes

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

No

Go to the next step.

4

VERIFY AFTER REPAIR 
PROCEDURE  



Perform the "After Repair Procedure". 
(See AFTER REPAIR 
PROCEDURE [MZI-3.7].)  



Are any DTCs present?  

Yes

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

No

Troubleshooting completed.

DTC P0607

Control module performance

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:39 AM

Page 268 

© 2005 Mitchell Repair Information Company, LLC.