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.