Mazda CX-9 Grand Touring. Manual — part 320

DTC P2196, P2198 [MZI-3.7]

DTC P2196, P2198 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P2196, P2198 (MZI-3.7) DIAGNOSTIC PROCEDURE



Is the PENDING CODE for this DTC
present?

14

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 P2196

P2196: Front HO2S (RH) signal stuck rich

DTC P2198

P2198: Front HO2S (LH) signal stuck rich

DETECTION

CONDITION



A HO2S indicating rich at the end of a test is trying to correct for an over-rich
condition. The test fails when the fuel control system no longer detects
switching for a calibrated amount of time

POSSIBLE

CAUSE



Front HO2S malfunction



Fuel injector malfunction



Insufficient fuel line pressure



Leakage exhaust gas



Air suction at intake-air system malfunction



Leakage fuel



MAF sensor malfunction



ECT sensor 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 online repair information
availability.

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 10:08:43 AM

Page 413

© 2005 Mitchell Repair Information Company, LLC.



Is any related Service Bulletins
available?

No

Perform the PCM reprogramming procedure.

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 P2196 or P2198 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

VERIFY CURRENT INPUT SIGNAL
STATUS



Connect the M-MDS to the DLC-2.



Verify the following PIDs. (See
PCM INSPECTION [MZI-3.7] .)



APP1



APP2



APP3



ECT



MAF



TP_REL



VSS



Are the PIDs normal?

Yes Go to the next step.

No

Inspect the malfunctioning part according to the

inspection results.

Then go to Step 11.

6

VERIFY CURRENT INPUT SIGNAL
STATUS UNDER FREEZE FRAME
DATA CONDITION



Connect the M-MDS to the DLC-2.



Verify the following PIDs under the
FREEZE FRAME DATA condition.

(See PCM INSPECTION [MZI-
3.7] .)



APP1



APP2



APP3

Yes Go to the next step.

No

Inspect the malfunctioning part according to the

inspection results. Then go to Step 11.

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 414

© 2005 Mitchell Repair Information Company, LLC.



ECT



MAF



TP_REL



VSS



Are the PIDs normal?

7

VERIFY CURRENT INPUT SIGNAL
STATUS OF MAF SENSOR



Connect the M-MDS to the DLC-2.



Start the engine.



Access the MAF PID.



Verify that the MAF PID changes
quickly according to engine speed.



Is the PID normal?

Yes Go to the next step.

No Replace the MAF/IAT sensor, then go to Step 11.

8

INSPECT FRONT HO2S



Inspect the front HO2S (RH) (with
DTC P2195) or the front HO2S (LH)
(with DTC P2197).

(See FRONT 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, then go to Step 11.

No

Go to the next step.

9

INSPECT FUEL INJECTOR



Inspect the fuel injector for the right
bank (with DTC P2196) or the left
bank (with DTC P2198).

(See FUEL INJECTOR
INSPECTION [MZI-3.7] .)



Is there any malfunction?

Yes

Replace the suspected fuel injector, then go to
Step 11. (See FUEL INJECTOR
REMOVAL/INSTALLATION [MZI-3.7] .)

No

Go to the next step.

10

INSPECT FUEL LINE PRESSURE



Perform the "FUEL LINE
PRESSURE INSPECTION".

(See FUEL LINE PRESSURE
INSPECTION [MZI-3.7] .)



Is there any malfunction?

Yes

Replace the malfunctioning part. Go to the next
step.

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 10:08:43 AM

Page 415

© 2005 Mitchell Repair Information Company, LLC.

DTC P2270, P2272 [MZI-3.7]

DTC P2270, P2272 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P2270, P2272 (MZI-3.7) DIAGNOSTIC PROCEDURE

11

VERIFY TROUBLESHOOTING OF
DTC P2196, P2198 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
more, then idle the engine for 60s or
more.



Perform 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.

12

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 P2270

P2270: Rear HO2S (RH) signal stuck lean

DTC P2272

P2272: Rear HO2S (LH) signal stuck lean

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



Leakage exhaust gas

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS

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 416

© 2005 Mitchell Repair Information Company, LLC.