Mazda CX-9 Grand Touring. Manual — part 273



Press STOP (#4) on M-MDS
tester to open the EVMV.



Does the pressure drop
immediately?

7

INSPECT FOR
MALFUNCTIONING CV
SOLENOID VALVE OR FUEL
TANK PRESSURE SENSOR



Were both P0455 and P1443
present at Step 1?

Yes

Replace the CV solenoid valve.
(See CHARCOAL CANISTER, CANISTER
VENT (CV) SOLENOID VALVE, AIR FILTER
COMPONENT REMOVAL/INSTALLATION
[MZI-3.7] .) .) Go to the next step.

No

Replace the evaporative hose component.

(See FUEL TANK REMOVAL/INSTALLATION

[MZI-3.7] .)

Go to the next step.

8

EVAP SYSTEM LEAK TEST



Connect all disconnected
connectors and hoses.



Perform the EVAP System Leak
Test. (See ENGINE CONTROL
SYSTEM OPERATION
INSPECTION [MZI-3.7] .)



Are the test results normal?

Yes Go to the next step.

No

Leakage still exists. Locate leak point and repair.

Repeat this step.

9

VERIFY TROUBLESHOOTING OF
DTC P0455 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.



Start the engine and run it at idle.



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.

10

VERIFY AFTER REPAIR
PROCEDURE



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

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 225

© 2005 Mitchell Repair Information Company, LLC.

DTC P0457 [MZI-3.7]

DTC P0457 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P0457 (MZI-3.7) DIAGNOSTIC PROCEDURE



Are any DTC present?

No

Troubleshooting completed.

DTC P0457

Evaporative emission system leak detected (fuel cap loose/off)

DETECTION

CONDITION



P0457 indicates that the initial vacuum could not be achieved after a
refueling event and the purge vapor flow is excessive (gross leak).

POSSIBLE CAUSE



Missing or loose fuel filler cap.

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

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 related pending code or stored
DTCs.



Are other DTCs present?

NOTE:



If DTC P0455 is present,
diagnose that DTC first. (See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION
[MZI-3.7] .)

Yes

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

No

Go to the next step.

INSPECT FOR MISSING OR

2008 Mazda CX-9 Grand Touring

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

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Sunday, November 15, 2009 10:08:38 AM

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© 2005 Mitchell Repair Information Company, LLC.

DTC P0460 [MZI-3.7]

DTC P0460 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

4

LEAKING FUEL FILLER CAP



Check for missing or loose fuel filler
cap.



Check for possible cross-threaded
fuel filler cap.



Is a concern present?

Yes

Repair or replace if necessary. Go to the next
step.

No

Go to Step 6.

5

EVAP SYSTEM LEAK TEST



Perform the EVAP system leak test.
(See ENGINE CONTROL
SYSTEM OPERATION
INSPECTION [MZI-3.7] .)



Are the test results normal?

Yes Go to Step 6.

No

Leakage still exists. Go to the P0455

Troubleshooting. (See ENGINE CONTROL

SYSTEM OPERATION INSPECTION [MZI-

3.7] .)

6

VERIFY TROUBLESHOOTING OF
DTC P0457 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.



Start the engine and run it at idle.



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.

7

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 P0460

Fuel level sensor circuit

DETECTION

CONDITION



The PCM monitors the fuel level input communications network message for a
concern. The test fails when the PCM determines that the value of the fuel level
input signal is stuck. The PCM calculates the amount of fuel used during

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 227

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P0460 (MZI-3.7) DIAGNOSTIC PROCEDURE

operation. If the fuel level input signal does not change or does not correspond
with the calculated fuel usage, the DTC is set.

POSSIBLE

CAUSE



Empty fuel tank



Fuel pump malfunction



Incorrectly installed fuel gauge



Instrument cluster malfunction



Fuel level input signal circuit malfunction



Overfilled fuel tank



Fuel gauge malfunction



Stuck float arm

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 the FREEZE FRAME DATA on the repair

order, then go to the next step.

2

VERIFY REPAIR INFORMATION
AVAILABILITY



Verify related Service Bulletins
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

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 related pending code or
stored DTCs.



Is other DTCs present?

Yes

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

No

Go to the next step.

4

VERIFY STORED DTC IN
INSTRUMENT CLUSTER



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



Verify stored DTCs in instrument
cluster.

Yes

Go to the appropriate DTC inspection. (See DTC
TABLE [INSTRUMENT CLUSTER] .)

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 228

© 2005 Mitchell Repair Information Company, LLC.