Mazda CX-9 Grand Touring. Manual — part 227

DTC P0022 [MZI-3.7]

DTC P0022 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P0022 (MZI-3.7) DIAGNOSTIC PROCEDURE

5

VERIFY TROUBLESHOOTING OF
DTC P0021 HAS BEEN COMPLETED



Make sure to reconnect all
disconnected connectors.



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



Turn the ignition switch off.



Start the engine and warm it up
completely.



Is the same 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.

6

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 P0022

CMP timing over-retarded (LH)

DETECTION

CONDITION



The PCM monitors the variable valve timing position for over-retarded
camshaft timing. The test fails when the camshaft timing exceeds a maximum
calibrated value or remains in a retarded position.

POSSIBLE

CAUSE



OCV (LH) malfunction



Low engine oil pressure



Spool valve in the OCV (LH) is stuck in retard position



Improper valve timing due to timing chain slippage

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.

VERIFY RELATED REPAIR

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:34 AM

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© 2005 Mitchell Repair Information Company, LLC.

2

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 ENGINE OIL PRESSURE



Start the engine.



Does the oil pressure warning light
illuminate?

Yes

Inspect the engine oil pressure, then go to
Step 6. (See OIL PRESSURE
INSPECTION [MZI-3.7] .)

No

Go to the next step.

4

VERIFY TIMING CHAIN
INSTALLATION



Stop the engine.



Remove the front cover.



Is the camshaft timing mark at the
correct point?

(See TIMING CHAIN
REMOVAL/INSTALLATION [MZI-
3.7] .)

Yes Go to the next step.

No

Reinstall the timing chain, then go to Step 6.

5

INSPECT OCV (LH)



Inspect the OCV (LH).

(See OIL CONTROL VALVE (OCV)
INSPECTION [MZI-3.7] .)



Is there any malfunction?

Yes

Replace the OCV (LH), then go to the next
step.

No

Go to the next step.

6

VERIFY TROUBLESHOOTING OF DTC
P0022 COMPLETED



Make sure to reconnect all disconnected
connectors.



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



Turn the ignition switch off.



Start the engine and warm it up
completely.



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.

VERIFY AFTER REPAIR PROCEDURE

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:34 AM

Page 42

© 2005 Mitchell Repair Information Company, LLC.

DTC P0040, P0041 [MZI-3.7]

DTC P0040, P0041 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DTC P0040, P0041 (MZI-3.7) DIAGNOSTIC PROCEDURE

7



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 P0040

P0040: Front HO2S (LH/RH) signals swapped

DTC P0041

P0041: Rear HO2S (LH/RH) signals swapped

DETECTION

CONDITION



P0040 indicates that during KOER testing, the front HO2S signal(s)
response for a fuel shift to the correct engine bank was not indicated.



P0041 indicates that during KOER testing, the rear HO2S signal(s)
response for a fuel shift to the correct engine bank was not indicated.

POSSIBLE CAUSE



Crossed HO2S harness connectors.



Crossed wiring at HO2S harness connectors.



Crossed wiring at PCM harness connector.

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

INSPECT HO2S WIRING HARNESS
CONNECTORS



For P0040, visually inspect the vehicle
front HO2S wiring harness connector (s) for
any indication of crossed wires (Also,
stretched or incorrectly mounted wiring
harnesses).



For P0041, visually inspect the vehicle rear

Yes Repair if necessary.

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:34 AM

Page 43

© 2005 Mitchell Repair Information Company, LLC.

DTC P0053, P0054, P0059, P0060 [MZI-3.7]

DTC P0053, P0054, P0059, P0060 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

HO2S wiring harness connector (s) for any
indication of crossed wires (Also, stretched
or incorrectly mounted wiring harnesses).



Are there crossed connections or wires?

No

Go to the next step.

4

VERIFY TROUBLESHOOTING OF DTC
P0040, P0041 HAS BEEN COMPLETED



Verify that all disconnected connectors
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.

5

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 P0053

P0053: Front HO2S (RH) heater resistance

DTC P0054

P0054: Rear HO2S (RH) heater resistance

DTC P0059

P0059: Front HO2S (LH) heater resistance

DTC P0060

P0060: Rear HO2S (LH) heater resistance

DETECTION

CONDITION



Heater current requirements too low or high in the heated oxygen sensor
(HO2S) heater control circuit.

POSSIBLE CAUSE



Open circuit between HO2S terminal C and main relay No.1 terminal E



Short to ground circuit between HO2S terminal A and body ground



HO2S circuits are shorted each other



DTC P0053: Open circuit between front HO2S (RH) terminal A and PCM
terminal 2J



DTC P0054: Open circuit between rear HO2S (RH) terminal A and PCM

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:34 AM

Page 44

© 2005 Mitchell Repair Information Company, LLC.