Mazda CX-9 Grand Touring. Manual - part 261

 

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Mazda CX-9 Grand Touring. Manual - part 261

 

 

Turn the ignition switch to the ON 
position (Engine running).  

With the engine running, determine if 
the generator is still noisy.  

Does the noise remain constant when 
the terminal B is disconnected?  

5

INSPECT CMP SENSOR (RH) 
CONNECTOR FOR POOR 
CONNECTION
  

Turn the ignition switch off.  

Disconnect the CMP sensor (RH) 
connector.  

Inspect for poor connection (such as 
damaged/pulled-out pins, corrosion).  

Are there any malfunction?  

Yes

Repair or replace suspected part, then go to Step 
11.

No

Go to the next step.

6

INSPECT CMP SENSOR SIGANAL 
CIRCUIT FOR SHORT TO POWER 
SUPPLY
  

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

Measure voltage between CMP sensor 
(RH) terminal A (wiring harness-side) 
and body ground.  

Is the voltage B+?  

Yes

Repair or replace suspected part, then go to Step 
11.

No

Go to the next step.

7

INSPECT CMP SENSOR (RH) SIGNAL 
CIRCUIT FOR SHORT TO GROUND
  

Turn the ignition switch off.  

Check continuity between CMP sensor 
(RH) terminal A and body ground.  

Is there continuity?  

Yes

Repair or replace suspected part, then go to Step 
11.

No

Go to the next step.

8

INSPECT PCM CONNECTOR FOR 
POOR CONNECTION
  

Turn the ignition switch off.  

Disconnect PCM connector.  

Check for poor connection (such as 
damaged, pulled-out pins, and 
corrosion).  

Are there any malfunction?  

Yes

Repair or replace suspected part, then go to Step 
11.

No

Go to the next step.

INSPECT CMP SENSOR (RH) CIRCUIT 

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:37 AM

Page 177 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0344 [MZI-3.7] 

DTC P0344 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

9

FOR OPEN CIRCUIT  

Turn the ignition switch off.  

Check continuity between the 
following circuits: 

CMP sensor (RH) terminal A 
and PCM terminal 2X  

CMP sensor (RH) terminal B 
and PCM terminal 2C  

Is there continuity?  

Yes Go to the next step.

No

Repair or replace suspected part, then go to Step 

11.

10

INSPECT CMP SENSOR (RH)  

Inspect CMP sensor (RH). (See 
CRANKSHAFT POSITION (CKP) 
SENSOR INSPECTION [MZI-
3.7]
 .)  

Is there any malfunction?  

 

Replace CMP sensor (RH), then go to the next 
step. (See CRANKSHAFT POSITION (CKP) 
SENSOR REMOVAL/INSTALLATION 
[MZI-3.7]
 .)

No

Go to the next step.

11

VERIFY TROUBLESHOOTING OF 
DTC P0340 COMPLETED
  

Verify that all disconnected 
connectors reconnected.  

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

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

Start the engine.  

Access the MAF PID using the M-
MDS.  

Is 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.

12

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 P0344

CMP sensor (RH) circuit intermittent

DETECTION 

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:37 AM

Page 178 

© 2005 Mitchell Repair Information Company, LLC. 

CONDITION 

The test fails when the PCM detects an intermittent signal from the CMP 
sensor.  

POSSIBLE CAUSE 

Connector or terminal malfunction  

CMP sensor (RH) malfunction  

Sensor shielding malfunction  

Short to ground circuit between CMP sensor (RH) terminal A and PCM 
terminal 2X  

Short to power supply between CMP sensor (RH) terminal A and PCM 
terminal 2X  

Open circuit between CMP sensor (RH) terminal A and PCM terminal 2X  

Open circuit between CMP sensor (RH) terminal B and PCM terminal 2C  

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:37 AM

Page 179 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DTC P0344 (MZI-3.7) DIAGNOSTIC PROCEDURE 

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 10:08:37 AM

Page 180 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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