Mazda CX-9 Grand Touring. Manual — part 321

1

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 the PCM reprogramming procedure.

(See PCM CONFIGURATION [MZI-3.7] .)

Then go to the next step.

3

VERIFY RELATED PENDING CODE OR
STORED DTCs



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



Verify the related PENDING CODE or
stored DTCs using the M-MDS.

Yes

Go to the appropriate DTC troubleshooting.
(See DTC TABLE [MZI-3.7].)

No

Go to the next step.

4

IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA



Is DTC P2270 or P2272 on the FREEZE
FRAME DATA?

Yes Go to the next step.

No

Go to the troubleshooting for the DTC on the

FREEZE FRAME DATA. (See DTC TABLE

[MZI-3.7].)

5

INSPECT FOR EXHAUST GAS
LEAKAGE Visually inspect for exhaust gas
leakage between the TWC and the rear
HO2S.



Is there any malfunction?

Yes

Repair or replace the malfunctioning parts.
Then go to the next step.

No

Go to the next step.

6

INSPECT REAR HO2S



For DTC P02270 Inspect the rear HO2S
(RH)



For DTC P02272 Inspect the rear HO2S
(LH)

(See REAR HEATED OXYGEN
SENSOR (HO2S) INSPECTION
[MZI-3.7] .)



Is there any malfunction?

Yes

Repair or replace the malfunctioning parts.
Then go to the next step.

No

Go to the next step.

VERIFY TROUBLESHOOTING OF DTC
P2270, P2272 HAS BEEN COMPLETED

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:43 AM

Page 417

© 2005 Mitchell Repair Information Company, LLC.

DTC P2271, P2273 [MZI-3.7]

DTC P2271, P2273 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P2271, P2273 (MZI-3.7) DIAGNOSTIC PROCEDURE

7



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 no load racing at the engine
speed of 2,500-3,500 rpm for 60s or
more, then idle the engine for 60s or
more.



Perform the KOEO and KOER self-test.



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 "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 P2271

P2271: Rear HO2S (RH) signal stuck rich

DTC P2273

P2273: Rear HO2S (LH) signal stuck rich

DETECTION

CONDITION



The downstream HO2S is forced rich and monitored by the PCM. The test
fails if the PCM does not detect the output of the HO2S in a calibrated
amount of time.

POSSIBLE CAUSE



Rear HO2S 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.

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:43 AM

Page 418

© 2005 Mitchell Repair Information Company, LLC.

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 the PCM reprogramming procedure. (See

PCM CONFIGURATION [MZI-3.7] .)

Then go to the next step.

3

VERIFY RELATED PENDING CODE
OR STORED DTCs



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



Verify the related PENDING
CODE or stored DTCs using the M-
MDS.

Yes

Go to the appropriate DTC troubleshooting. (See
DTC TABLE [MZI-3.7].)

No

Go to the next step.

4

IDENTIFY TRIGGER DTC FOR
FREEZE FRAME DATA



Is DTC P2271 or P2273 on
FREEZE FRAME DATA?

Yes Go to the next step.

No

Go to the troubleshooting for the DTC on the

FREEZE FRAME DATA. (See DTC TABLE

[MZI-3.7].)

5

INSPECT REAR HO2S



For DTC P2271 Inspect the rear
HO2S(RH)



For DTC P2273 Inspect the rear
HO2S(LH)

(See REAR HEATED OXYGEN
SENSOR (HO2S) INSPECTION
[MZI-3.7] .)



Is there any malfunction?

Yes

Inspect the related wiring harnesses.
If there is no malfunction, replace the HO2S. (See
REAR HEATED OXYGEN SENSOR (HO2S)
REMOVAL/INSTALLATION [MZI-3.7] .)

No

Go to the next step.

6

VERIFY TROUBLESHOOTING OF
DTC P2271, P2273 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 no load racing at the engine
speed of 2,500-3,500 rpm for 60s or

Yes

Replace the PCM, then go to the next step. (See
PCM REMOVAL/INSTALLATION [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 10:08:43 AM

Page 419

© 2005 Mitchell Repair Information Company, LLC.

DTC P260F [MZI-3.7]

DTC P260F (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P260F (MZI-3.7) DIAGNOSTIC PROCEDURE

more, then idle the engine for 60s or
more.



Perform the KOEO and KOER self-
test.



Retrieve DTCs using the M-MDS.



Is the PENDING CODE for this
DTC present?

No

Go to the next step.

7

VERIFY AFTER REPAIR
PROCEDURE



Perform "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 P260F

Evaporative emission system monitoring processor performance

DETECTION

CONDITION



This DTC sets when a concern is detected internal to the PCM. The
microprocessor that controls the engine off natural vacuum (EONV) leak
check monitor is separate from the main processor within the PCM.

POSSIBLE

CAUSE



Module communications network concerns



PCM calibration level



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

Yes

Perform repair or diagnosis according to the
available Service Bulletins.



If the vehicle is not repaired, 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 10:08:44 AM

Page 420

© 2005 Mitchell Repair Information Company, LLC.