Mazda CX-9 Grand Touring. Manual - part 258

6

INSPECT FOR PROPER CKP BIAS 
VOLTAGES IN PCM  



Disconnect the CKP sensor connector.  



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



Measure the voltage between: 



CKP sensor terminal A on the wiring 
harness side and battery negative  



CKP sensor terminal B on the wiring 
harness side and battery negative  



Are the voltages between 1-3 V?  

Yes Go to the next step.

No

Go to Step 8.

7

INSPECT CKP SENSOR RESISTANCE  



Turn the ignition switch off.  



Measure the resistance between CKP 
sensor terminal A and B on the component 
side.  



Is the resistance between 0.25-1 kilohms?  

Yes Go to the next step.

No

Replace the CKP sensor. Then go to Step 

13.

8

INSPECT CKP WIRING HARNESS SHIELD 
CIRCUIT FOR SHORT TO GROUND 

 



Measure the resistance between: 



CKP_SHLD assembly connector 
wiring harness side and ground  



Is the resistance less than 5 ohms?  

NOTE:



The wiring harness shield protects the 
CKP signal from electrical noise and is 
grounded at one end, typically near the 
PCM.  

NOTE:



Perform the following resistance 
measurement between the CKP shield 
and the ground.  

Yes Go to the next step.

No

Repair the short circuit. Check for a poor 

ground. Then go to Step 13.

9

INSPECT FOR SHORT BETWEEN CKP (+) 
AND CKP (-) IN WIRING HARNESS  



Turn the ignition switch off.  



Disconnect the PCM connector.  

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 10:08:37 AM

Page 165 

© 2005 Mitchell Repair Information Company, LLC. 



Measure the resistance between: 



CKP sensor terminal A and B on the 
wiring harness side  



Is the resistance more than 10 kilohms?  

No

Repair or replace suspected part, Then go to 

Step 13.

10

INSPECT CKP CIRCUIT(S) FOR OPEN 
CIRCUIT IN WIRING HARNESS  



Measure the resistance between: 



CKP sensor connector A on the 
wiring harness side and PCM 
terminal 2P  



CKP sensor connector B on the 
wiring harness side and PCM 
terminal 2T  



Are the resistances less than 5 ohms?  

Yes Go to the next step.

No

Repair or replace suspected part, Then go to 

Step 13.

11

INSPECT CKP CIRCUIT(S) FOR SHORT 
TO GROUND IN WIRING HARNESS  



Measure the resistance between: 



CKP sensor connector A on the 
wiring harness side and battery 
negative  



CKP sensor connector B on the 
wiring harness side and battery 
negative  



Are the resistances more than 10 kilohms?  

Yes Go to the next step.

No

Repair or replace suspected part, Then go to 

Step 13.

12

INSPECT CKP CIRCUIT FOR SHORT TO 
VOLTAGE IN WIRING HARNESS  



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



Measure the voltage between: 



CKP sensor connector A on the 
wiring harness side and battery 
negative  



CKP sensor connector B on the 
wiring harness side and battery 
negative  



Are any voltage present?  

Yes

Repair or replace suspected part, Then go to 
Step 13.

No

Go to the next step.

VERIFY TROUBLESHOOTING OF DTC 
P0320 HAS BEEN COMPLETED  



Verify that all disconnected connectors are 

 

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 166 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0325 [MZI-3.7] 

DTC P0325 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

13

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.

14

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 P0325

KS circuit (RH)

DETECTION 

CONDITION 



The KS detects vibrations upon increase and decrease in engine RPM. The KS 
generates a voltage based on this vibration. A DTC is set if the voltage goes outside 
a calibrated level.  

POSSIBLE CAUSE 



Open circuit wiring harness between KS terminal C and PCM terminal 2L  



Short to power supply in wiring harness between KS terminal C and PCM terminal 
2L  



Short to ground circuit between KS terminal C and PCM terminal 2L  



Open circuit wiring harness between KS terminal D and PCM terminal 2G  



Short to power supply in wiring harness between KS terminal D and PCM terminal 
2G  



Short to ground circuit between KS terminal D and PCM terminal 2G  



Connector or terminal malfunction  



KS malfunction  

 

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 167 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DTC P0325 (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.

2

VERIFY RELATED REPAIR 
INFORMATION AVAILABILITY  



Verify related Service Bulletins 
and/or on-line 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 10:08:37 AM

Page 168 

© 2005 Mitchell Repair Information Company, LLC.