Mazda CX-9 Grand Touring. Manual - part 318

6



Turn the ignition switch off.  



Inspect for continuity between the 
following terminals (wiring harness-
side). 



APP sensor terminal F and 
PCM terminal 1BA.  



APP sensor terminal D and 
PCM terminal 1Y.  



APP sensor terminal G and 
PCM terminal 1AD.  



APP sensor terminal C and 
PCM terminal 1AH.  



APP sensor terminal B and 
PCM terminal 1AC.  



Are there continuity?  

Yes Go to the next step.

No

Repair or replace suspected part, then go to Step 

8.

7

INSPECT APP SENSOR NO.3 SIGNAL 
CIRCUIT FOR SHORT TO POWER 
SUPPLY  



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



Measure the voltage between the 
following terminals (wiring harness-
side). 



APP sensor terminal F and 
body ground.  



APP sensor terminal D and 
body ground.  



APP sensor terminal G and 
body ground.  



APP sensor terminal C and 
body ground.  



APP sensor terminal B and 
body ground.  



Are there voltage B+?  

Yes

Repair or replace suspected part, then go to Step 
8.

No

Go to the next step.

8

VERIFY TROUBLESHOOTING OF 
DTC P2133 HAS BEEN COMPLETED 



Verify that all disconnected 
connectors reconnected.  



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

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 10:08:43 AM

Page 405 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P2135 [MZI-3.7] 

DTC P2135 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 



Start the engine.  



Is the same DTC present?  

No

Go to the next step.

9

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

DTC troubleshooting completed.

DTC P2135

TP sensor No.1/No.2 voltage correlation

DETECTION 

CONDITION 



The PCM flagged a concern indicating that TP sensor No.1 and TP sensor No.2 
disagree by more than a calibrated limit.  

POSSIBLE CAUSE 



Short to power supply between TP sensor No.1 terminal F and PCM terminal 2Z



Short to power supply between TP sensor No.2 terminal C and PCM terminal 
2AD  



TP sensor circuits are shorted each other  



TP sensor malfunction  

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:08:43 AM

Page 406 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DTC P2135 (MZI-3.7) DIAGNOSTIC PROCEDURE 

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 10:08:43 AM

Page 407 

© 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

INSPECT TP SENSOR RESISTANCE 



Turn the ignition switch off.  



Disconnect the throttle body 
connector.  



Measure the resistance between the 
following terminals (throttle body 
component side). 



Throttle body terminal F and 
D: 700-1,800 ohms  



Throttle body terminal F and 
E: 1,300-2,800 ohms  



Throttle body terminal C and 
D: 1,000-2,400 ohms  



Throttle body terminal C and 
E: 500-1,500 ohms  



Throttle body terminal D and 
E: 700-2,100 ohms  



Are all the resistances within 
specifications?  

Yes Go to the next step.

No

Replace the throttle body, then go to Step 6. (See 

INTAKE-AIR SYSTEM 

REMOVAL/INSTALLATION [MZI-3.7] .)

4

INSPECT TP SENSOR SIGNAL 
CIRCUIT FOR SHORT TO POWER 
SUPPLY  



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



Measure the voltage between the 
following circuits: 



Throttle body terminal F 
(wiring harness-side) and 
body ground.  



Throttle body terminal C 
(wiring harness-side) and 

Yes Repair or replace suspected part, then go to Step 6.

No

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 10:08:43 AM

Page 408 

© 2005 Mitchell Repair Information Company, LLC.