Mazda CX-9 Grand Touring. Manual — part 225

DIAGNOSTIC PROCEDURE

DTC P0012 (MZI-3.7) DIAGNOSTIC PROCEDURE

calibrated value or remains in a retarded position.

POSSIBLE

CAUSE



OCV (RH) malfunction



Low engine oil pressure



Spool valve in the OCV (RH) 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.

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 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 (RH)



Inspect the OCV (RH).

(See OIL CONTROL VALVE (OCV)

Yes

Replace the OCV (RH), 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 10:08:34 AM

Page 33

© 2005 Mitchell Repair Information Company, LLC.

DTC P0016, P0018 [MZI-3.7]

DTC P0016, P0018 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P0016, P0018 (MZI-3.7) DIAGNOSTIC PROCEDURE

INSPECTION [MZI-3.7] .)



Is there any malfunction?

No

Go to the next step.

6

VERIFY TROUBLESHOOTING OF DTC
P0012 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.

7

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 P0016

P0016: CKP-CMP sensor (RH) correlation

DTC P0018

P0018: CKP-CMP sensor (LH) correlation

DETECTION

CONDITION



The PCM monitors the variable valve timing position for a misalignment
between the camshaft and crankshaft. The test fails when the misalignment is
more than 1 tooth.

POSSIBLE CAUSE



OCV malfunction



Camshaft advanced mechanism binding



Improper valve timing

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED

Yes 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 10:08:34 AM

Page 34

© 2005 Mitchell Repair Information Company, LLC.

1



Has FREEZE FRAME DATA been
recorded?

No

Record the 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 AND
STORED DTC



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



Verify pending and stored DTCs using
M-MDS.



Is other DTC present?

Yes

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

No

Go to the next step.

4

VERIFY CURRENT INPUT SIGNAL
STATUS



Start the engine and warm up
completely.



Access VT ACT1 (P0016) or VT ACT2
(P0018) PID using the M-MDS.



Is PID reading normal?



-14-46°

Yes Go to the next step.

No

Replace the OCV, then go to Step 6. (See OIL

CONTROL VALVE (OCV)

REMOVAL/INSTALLATION [MZI-3.7] .)

5

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 the next

step.

6

VERIFY TROUBLESHOOTING OF DTC
P0016, P0018 HAS BEEN COMPLETED



Make sure to reconnect all disconnected
connectors.



Turn the engine switch to the ON

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 10:08:34 AM

Page 35

© 2005 Mitchell Repair Information Company, LLC.

DTC P0020 [MZI-3.7]

DTC P0020 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

position.



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



Start the engine.



Is the same DTC present?

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 DTCs present?

Yes

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

No

Troubleshooting completed.

DTC P0020

CMP actuator circuit open (LH)

DETECTION

CONDITION



The PCM monitors the OCV (LH) circuit to the PCM for high and low voltage. The
test fails if the voltage exceeds or falls below a calibrated limit for a calibrated
amount of time.

POSSIBLE CAUSE



OCV (LH) malfunction



Connector or terminal malfunction



Open circuit between OCV (LH) terminal A and main relay No.1 terminal D



Open circuit between OCV (LH) terminal B and PCM terminal 2BK



Short to ground circuit between OCV (LH) terminal B and PCM terminal 2BK



Short to power supply between OCV (LH) terminal B and PCM terminal 2BK

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 36

© 2005 Mitchell Repair Information Company, LLC.